#2529 NXDN adds aliasing support for Type-D identifiers and fixes issue in certain NXDN messaing where the TO identifiers are incorrectly tagged. (#2547)

Co-authored-by: denny <dennis.sheirer@gmail.com>

src/main/java/io/github/dsheirer/alias/AliasFactory.java

@@ -30,12 +30,16 @@ import io.github.dsheirer.alias.id.legacy.mobileID.Min;
 import io.github.dsheirer.alias.id.legacy.siteID.SiteID;
 import io.github.dsheirer.alias.id.lojack.LoJackFunctionAndID;
 import io.github.dsheirer.alias.id.priority.Priority;
+import io.github.dsheirer.alias.id.radio.NXDNTypeDRadio;
+import io.github.dsheirer.alias.id.radio.NXDNTypeDRadioRange;
 import io.github.dsheirer.alias.id.radio.P25FullyQualifiedRadio;
 import io.github.dsheirer.alias.id.radio.Radio;
 import io.github.dsheirer.alias.id.radio.RadioRange;
 import io.github.dsheirer.alias.id.record.Record;
 import io.github.dsheirer.alias.id.status.UnitStatusID;
 import io.github.dsheirer.alias.id.status.UserStatusID;
+import io.github.dsheirer.alias.id.talkgroup.NXDNTypeDTalkgroup;
+import io.github.dsheirer.alias.id.talkgroup.NXDNTypeDTalkgroupRange;
 import io.github.dsheirer.alias.id.talkgroup.P25FullyQualifiedTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.Talkgroup;
 import io.github.dsheirer.alias.id.talkgroup.TalkgroupRange;
@@ -79,6 +83,31 @@ public class AliasFactory
                 Min copyMin = new Min();
                 copyMin.setMin(originalMin.getMin());
                 return copyMin;
+            case NXDN_TYPE_D_RADIO_ID:
+                NXDNTypeDRadio originalTypeDRadio = (NXDNTypeDRadio)id;
+                NXDNTypeDRadio copyTypeDRadio = new NXDNTypeDRadio(originalTypeDRadio.getHomeRepeater(),
+                        originalTypeDRadio.getIdentifier());
+                copyTypeDRadio.setOverlap(originalTypeDRadio.overlapProperty().get());
+                return copyTypeDRadio;
+            case NXDN_TYPE_D_RADIO_ID_RANGE:
+                NXDNTypeDRadioRange originalTypeDRadioRange = (NXDNTypeDRadioRange)id;
+                NXDNTypeDRadioRange copyTypeDRadioRange = new NXDNTypeDRadioRange(originalTypeDRadioRange.getHomeRepeater(),
+                        originalTypeDRadioRange.getMinIdentifier(), originalTypeDRadioRange.getMaxIdentifier());
+                copyTypeDRadioRange.setOverlap(originalTypeDRadioRange.overlapProperty().get());
+                return copyTypeDRadioRange;
+            case NXDN_TYPE_D_TALKGROUP:
+                NXDNTypeDTalkgroup originalTypeDTalkgroup = (NXDNTypeDTalkgroup)id;
+                NXDNTypeDTalkgroup copyTypeDTalkgroup = new NXDNTypeDTalkgroup(originalTypeDTalkgroup.getHomeRepeater(),
+                        originalTypeDTalkgroup.getIdentifier());
+                copyTypeDTalkgroup.setOverlap(originalTypeDTalkgroup.overlapProperty().get());
+                return copyTypeDTalkgroup;
+            case NXDN_TYPE_D_TALKGROUP_RANGE:
+                NXDNTypeDTalkgroupRange originalTypeDTalkgroupRange = (NXDNTypeDTalkgroupRange)id;
+                NXDNTypeDTalkgroupRange copyTypeDTalkgroupRange = new NXDNTypeDTalkgroupRange(
+                        originalTypeDTalkgroupRange.getHomeRepeater(), originalTypeDTalkgroupRange.getMinIdentifier(),
+                        originalTypeDTalkgroupRange.getMaxIdentifier());
+                copyTypeDTalkgroupRange.setOverlap(originalTypeDTalkgroupRange.overlapProperty().get());
+                return copyTypeDTalkgroupRange;
             case P25_FULLY_QUALIFIED_RADIO_ID:
                 P25FullyQualifiedRadio originalP25 = (P25FullyQualifiedRadio) id;
                 P25FullyQualifiedRadio copyP25 = new P25FullyQualifiedRadio(originalP25.getWacn(),

src/main/java/io/github/dsheirer/alias/AliasList.java

@@ -134,6 +134,7 @@ public class AliasList
                 switch(id.getType())
                 {
                     case TALKGROUP:
+                    case NXDN_TYPE_D_TALKGROUP:
                         Talkgroup talkgroup = (Talkgroup)id;
 
                         TalkgroupAliasList talkgroupAliasList = mTalkgroupProtocolMap.get(talkgroup.getProtocol());
@@ -147,6 +148,7 @@ public class AliasList
                         talkgroupAliasList.add(talkgroup, alias);
                         break;
                     case TALKGROUP_RANGE:
+                    case NXDN_TYPE_D_TALKGROUP_RANGE:
                         TalkgroupRange talkgroupRange = (TalkgroupRange)id;
 
                         TalkgroupAliasList talkgroupRangeAliasList = mTalkgroupProtocolMap.get(talkgroupRange.getProtocol());
@@ -186,6 +188,7 @@ public class AliasList
                         p25TalkgroupAliasList.add(qualifiedTalkgroup, alias);
                         break;
                     case RADIO_ID:
+                    case NXDN_TYPE_D_RADIO_ID:
                         Radio radio = (Radio)id;
 
                         RadioAliasList radioAliasList = mRadioProtocolMap.get(radio.getProtocol());
@@ -199,6 +202,7 @@ public class AliasList
                         radioAliasList.add(radio, alias);
                         break;
                     case RADIO_ID_RANGE:
+                    case NXDN_TYPE_D_RADIO_ID_RANGE:
                         RadioRange radioRange = (RadioRange)id;
 
                         RadioAliasList radioRangeAliasList = mRadioProtocolMap.get(radioRange.getProtocol());

src/main/java/io/github/dsheirer/alias/id/AliasID.java

@@ -35,12 +35,16 @@ import io.github.dsheirer.alias.id.legacy.talkgroup.LegacyTalkgroupID;
 import io.github.dsheirer.alias.id.legacy.uniqueID.UniqueID;
 import io.github.dsheirer.alias.id.lojack.LoJackFunctionAndID;
 import io.github.dsheirer.alias.id.priority.Priority;
+import io.github.dsheirer.alias.id.radio.NXDNTypeDRadio;
+import io.github.dsheirer.alias.id.radio.NXDNTypeDRadioRange;
 import io.github.dsheirer.alias.id.radio.P25FullyQualifiedRadio;
 import io.github.dsheirer.alias.id.radio.Radio;
 import io.github.dsheirer.alias.id.radio.RadioRange;
 import io.github.dsheirer.alias.id.record.Record;
 import io.github.dsheirer.alias.id.status.UnitStatusID;
 import io.github.dsheirer.alias.id.status.UserStatusID;
+import io.github.dsheirer.alias.id.talkgroup.NXDNTypeDTalkgroup;
+import io.github.dsheirer.alias.id.talkgroup.NXDNTypeDTalkgroupRange;
 import io.github.dsheirer.alias.id.talkgroup.P25FullyQualifiedTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.StreamAsTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.Talkgroup;
@@ -64,6 +68,10 @@ import javafx.util.Callback;
     @JsonSubTypes.Type(value = Min.class, name = "min"),
     @JsonSubTypes.Type(value = MPT1327ID.class, name = "mpt1327ID"),
     @JsonSubTypes.Type(value = NonRecordable.class, name = "nonRecordable"),
+    @JsonSubTypes.Type(value = NXDNTypeDRadio.class, name = "nxdnTypeDRadio"),
+    @JsonSubTypes.Type(value = NXDNTypeDRadioRange.class, name = "nxdnTypeDRadioRange"),
+    @JsonSubTypes.Type(value = NXDNTypeDTalkgroup.class, name = "nxdnTypeDTalkgroup"),
+    @JsonSubTypes.Type(value = NXDNTypeDTalkgroupRange.class, name = "nxdnTypeDTalkgroupRange"),
     @JsonSubTypes.Type(value = P25FullyQualifiedRadio.class, name = "p25FullyQualifiedRadio"),
     @JsonSubTypes.Type(value = P25FullyQualifiedTalkgroup.class, name = "p25FullyQualifiedTalkgroup"),
     @JsonSubTypes.Type(value = Priority.class, name = "priority"),

src/main/java/io/github/dsheirer/alias/id/AliasIDType.java

@@ -29,6 +29,10 @@ public enum AliasIDType
     LOJACK("LoJack"),
     LTR_NET_UID("LTR-Net UID"),
     MIN("Passport MIN"),
+    NXDN_TYPE_D_RADIO_ID("NXDN Type-D Radio ID"),
+    NXDN_TYPE_D_RADIO_ID_RANGE("NXDN Type-D Radio ID Range"),
+    NXDN_TYPE_D_TALKGROUP("NXDN Type-D Talkgroup"),
+    NXDN_TYPE_D_TALKGROUP_RANGE("NXDN Type-D Talkgroup Range"),
     P25_FULLY_QUALIFIED_RADIO_ID("P25 Fully Qualified Radio ID"),
     P25_FULLY_QUALIFIED_TALKGROUP("P25 Fully Qualified Talkgroup"),
     PRIORITY("Audio Priority"),
@@ -58,6 +62,7 @@ public enum AliasIDType
 
     //Values used by the View-By alias editor
     public static EnumSet<AliasIDType> VIEW_BY_VALUES = EnumSet.of(TALKGROUP, TALKGROUP_RANGE, RADIO_ID, RADIO_ID_RANGE,
+        NXDN_TYPE_D_RADIO_ID, NXDN_TYPE_D_RADIO_ID_RANGE, NXDN_TYPE_D_TALKGROUP, NXDN_TYPE_D_TALKGROUP_RANGE,
         P25_FULLY_QUALIFIED_RADIO_ID, P25_FULLY_QUALIFIED_TALKGROUP, UNIT_STATUS, STATUS, TONES);
 
     public String toString()

src/main/java/io/github/dsheirer/alias/id/INXDNTypeD.java

@@ -0,0 +1,46 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id;
+
+/**
+ * NXDN Type-D alias identifier composed of a home repeater and a radio or talkgroup identifier value.
+ */
+public interface INXDNTypeD
+{
+    /**
+     * Home repeater for the identifier
+     */
+    int getHomeRepeater();
+
+    /**
+     * Sets the home repeater for the identifier
+     */
+    void setHomeRepeater(int homeRepeater);
+
+    /**
+     * Radio or talkgroup value, without the home repeater.
+     */
+    int getIdentifier();
+
+    /**
+     * Sets the radio or talkgroup value, without the home repeater.
+     */
+    void setIdentifier(int identifier);
+}

src/main/java/io/github/dsheirer/alias/id/INXDNTypeDRange.java

@@ -0,0 +1,56 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id;
+
+/**
+ * NXDN Type-D alias identifier range of radio or talkgroup values that share a common home repeater.
+ */
+public interface INXDNTypeDRange
+{
+    /**
+     * Home repeater for the range
+     */
+    int getHomeRepeater();
+
+    /**
+     * Sets the home repeater for the range
+     */
+    void setHomeRepeater(int homeRepeater);
+
+    /**
+     * Minimum radio or talkgroup value, without the home repeater.
+     */
+    int getMinIdentifier();
+
+    /**
+     * Sets the minimum radio or talkgroup value, without the home repeater.
+     */
+    void setMinIdentifier(int identifier);
+
+    /**
+     * Maximum radio or talkgroup value, without the home repeater.
+     */
+    int getMaxIdentifier();
+
+    /**
+     * Sets the maximum radio or talkgroup value, without the home repeater.
+     */
+    void setMaxIdentifier(int identifier);
+}

src/main/java/io/github/dsheirer/alias/id/radio/NXDNTypeDRadio.java

@@ -0,0 +1,96 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.radio;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.alias.id.INXDNTypeD;
+import io.github.dsheirer.preference.identifier.talkgroup.NXDNTalkgroupFormatter;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * NXDN Type-D radio.  The value is the over-the-air 16-bit identifier that combines the home repeater and radio so that
+ * it matches the value of an NXDN Type-D radio identifier.
+ */
+public class NXDNTypeDRadio extends Radio implements INXDNTypeD
+{
+    public NXDNTypeDRadio()
+    {
+        //No-arg JAXB constructor
+        setProtocol(Protocol.NXDN);
+    }
+
+    /**
+     * Constructs an instance
+     * @param homeRepeater for the radio
+     * @param radio value, without the home repeater
+     */
+    public NXDNTypeDRadio(int homeRepeater, int radio)
+    {
+        super(Protocol.NXDN, NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, radio));
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.NXDN_TYPE_D_RADIO_ID;
+    }
+
+    @JsonIgnore
+    @Override
+    public int getHomeRepeater()
+    {
+        return NXDNTalkgroupFormatter.getTypeDHomeRepeater(getValue());
+    }
+
+    @Override
+    public void setHomeRepeater(int homeRepeater)
+    {
+        setValue(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, getIdentifier()));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getValue());
+    }
+
+    @Override
+    public void setIdentifier(int identifier)
+    {
+        setValue(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Type-D Radio ID:").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getIdentifier(), true));
+        sb.append(" Protocol:").append(getProtocol());
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+}

src/main/java/io/github/dsheirer/alias/id/radio/NXDNTypeDRadioRange.java

@@ -0,0 +1,124 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.radio;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.alias.id.INXDNTypeDRange;
+import io.github.dsheirer.preference.identifier.talkgroup.NXDNTalkgroupFormatter;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * NXDN Type-D radio range for a single home repeater.  The min and max values are the over-the-air 16-bit identifiers
+ * that combine the home repeater and radio.
+ */
+public class NXDNTypeDRadioRange extends RadioRange implements INXDNTypeDRange
+{
+    public NXDNTypeDRadioRange()
+    {
+        //No-arg JAXB constructor
+        setProtocol(Protocol.NXDN);
+    }
+
+    /**
+     * Constructs an instance
+     * @param homeRepeater for the range
+     * @param minRadio value, without the home repeater
+     * @param maxRadio value, without the home repeater
+     */
+    public NXDNTypeDRadioRange(int homeRepeater, int minRadio, int maxRadio)
+    {
+        super(Protocol.NXDN, NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, minRadio),
+                NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, maxRadio));
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.NXDN_TYPE_D_RADIO_ID_RANGE;
+    }
+
+    @JsonIgnore
+    @Override
+    public int getHomeRepeater()
+    {
+        return NXDNTalkgroupFormatter.getTypeDHomeRepeater(getMinRadio());
+    }
+
+    @Override
+    public void setHomeRepeater(int homeRepeater)
+    {
+        int min = getMinIdentifier();
+        int max = getMaxIdentifier();
+        setMinRadio(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, min));
+        setMaxRadio(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, max));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getMinIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getMinRadio());
+    }
+
+    @Override
+    public void setMinIdentifier(int identifier)
+    {
+        setMinRadio(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getMaxIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getMaxRadio());
+    }
+
+    @Override
+    public void setMaxIdentifier(int identifier)
+    {
+        setMaxRadio(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    /**
+     * Valid when the base range is valid and both ends of the range use the same home repeater.
+     */
+    @Override
+    public boolean isValid()
+    {
+        return super.isValid() && getHomeRepeater() == NXDNTalkgroupFormatter.getTypeDHomeRepeater(getMaxRadio());
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Type-D Radio ID Range:").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getMinIdentifier(), true));
+        sb.append(" to ").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getMaxIdentifier(), true));
+        sb.append(" Protocol:").append(getProtocol());
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+}

src/main/java/io/github/dsheirer/alias/id/talkgroup/NXDNTypeDTalkgroup.java

@@ -0,0 +1,96 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.talkgroup;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.alias.id.INXDNTypeD;
+import io.github.dsheirer.preference.identifier.talkgroup.NXDNTalkgroupFormatter;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * NXDN Type-D talkgroup.  The value is the over-the-air 16-bit identifier that combines the home repeater and talkgroup
+ * so that it matches the value of an NXDN Type-D talkgroup identifier.
+ */
+public class NXDNTypeDTalkgroup extends Talkgroup implements INXDNTypeD
+{
+    public NXDNTypeDTalkgroup()
+    {
+        //No-arg JAXB constructor
+        setProtocol(Protocol.NXDN);
+    }
+
+    /**
+     * Constructs an instance
+     * @param homeRepeater for the talkgroup
+     * @param talkgroup value, without the home repeater
+     */
+    public NXDNTypeDTalkgroup(int homeRepeater, int talkgroup)
+    {
+        super(Protocol.NXDN, NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, talkgroup));
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.NXDN_TYPE_D_TALKGROUP;
+    }
+
+    @JsonIgnore
+    @Override
+    public int getHomeRepeater()
+    {
+        return NXDNTalkgroupFormatter.getTypeDHomeRepeater(getValue());
+    }
+
+    @Override
+    public void setHomeRepeater(int homeRepeater)
+    {
+        setValue(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, getIdentifier()));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getValue());
+    }
+
+    @Override
+    public void setIdentifier(int identifier)
+    {
+        setValue(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Type-D Talkgroup:").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getIdentifier(), true));
+        sb.append(" Protocol:").append(getProtocol());
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+}

src/main/java/io/github/dsheirer/alias/id/talkgroup/NXDNTypeDTalkgroupRange.java

@@ -0,0 +1,125 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2026 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.talkgroup;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.alias.id.INXDNTypeDRange;
+import io.github.dsheirer.preference.identifier.talkgroup.NXDNTalkgroupFormatter;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * NXDN Type-D talkgroup range for a single home repeater.  The min and max values are the over-the-air 16-bit
+ * identifiers that combine the home repeater and talkgroup.
+ */
+public class NXDNTypeDTalkgroupRange extends TalkgroupRange implements INXDNTypeDRange
+{
+    public NXDNTypeDTalkgroupRange()
+    {
+        //No-arg JAXB constructor
+        setProtocol(Protocol.NXDN);
+    }
+
+    /**
+     * Constructs an instance
+     * @param homeRepeater for the range
+     * @param minTalkgroup value, without the home repeater
+     * @param maxTalkgroup value, without the home repeater
+     */
+    public NXDNTypeDTalkgroupRange(int homeRepeater, int minTalkgroup, int maxTalkgroup)
+    {
+        super(Protocol.NXDN, NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, minTalkgroup),
+                NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, maxTalkgroup));
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.NXDN_TYPE_D_TALKGROUP_RANGE;
+    }
+
+    @JsonIgnore
+    @Override
+    public int getHomeRepeater()
+    {
+        return NXDNTalkgroupFormatter.getTypeDHomeRepeater(getMinTalkgroup());
+    }
+
+    @Override
+    public void setHomeRepeater(int homeRepeater)
+    {
+        int min = getMinIdentifier();
+        int max = getMaxIdentifier();
+        setMinTalkgroup(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, min));
+        setMaxTalkgroup(NXDNTalkgroupFormatter.toTypeDValue(homeRepeater, max));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getMinIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getMinTalkgroup());
+    }
+
+    @Override
+    public void setMinIdentifier(int identifier)
+    {
+        setMinTalkgroup(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    @JsonIgnore
+    @Override
+    public int getMaxIdentifier()
+    {
+        return NXDNTalkgroupFormatter.getTypeDIdentifier(getMaxTalkgroup());
+    }
+
+    @Override
+    public void setMaxIdentifier(int identifier)
+    {
+        setMaxTalkgroup(NXDNTalkgroupFormatter.toTypeDValue(getHomeRepeater(), identifier));
+    }
+
+    /**
+     * Valid when the base range is valid and both ends of the range use the same home repeater.
+     */
+    @Override
+    public boolean isValid()
+    {
+        return super.isValid() &&
+                getHomeRepeater() == NXDNTalkgroupFormatter.getTypeDHomeRepeater(getMaxTalkgroup());
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Type-D Talkgroup Range:").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getMinIdentifier(), true));
+        sb.append(" to ").append(NXDNTalkgroupFormatter.toTypeD(getHomeRepeater(), getMaxIdentifier(), true));
+        sb.append(" Protocol:").append(getProtocol());
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+}