diff --git a/tools/cooja/java/org/contikios/cooja/interfaces/IPAddress.java b/tools/cooja/java/org/contikios/cooja/interfaces/IPAddress.java
index 67fd284e3..b9834aacc 100644
--- a/tools/cooja/java/org/contikios/cooja/interfaces/IPAddress.java
+++ b/tools/cooja/java/org/contikios/cooja/interfaces/IPAddress.java
@@ -44,6 +44,7 @@ import org.contikios.cooja.MoteInterface;
 import org.contikios.cooja.mote.memory.MemoryInterface;
 import org.contikios.cooja.mote.memory.MemoryInterface.SegmentMonitor;
 import org.contikios.cooja.mote.memory.VarMemory;
+import org.contikios.cooja.util.IPUtils;
 
 /**
  * Read-only interface to IPv4 or IPv6 address.
@@ -93,36 +94,14 @@ public class IPAddress extends MoteInterface {
    */
   public String getIPString() {
     if (isVersion4()) {
-      String ipString = "";
       byte[] ip = moteMem.getByteArray("uip_hostaddr", 4);
-      for (int i = 0; i < 3; i++) {
-        ipString += (0xFF & ip[i]) + ".";
-      }
-      ipString += (0xFF & ip[3]);
-      return ipString;
+      return IPUtils.getIPv4AddressString(ip);
     } else if (isVersion6()) {
-      String ipString = getUncompressedIPv6Address();
-      return compressIPv6Address(ipString);
+      return IPUtils.getCompressedIPv6AddressString(getIPv6Address());
     }
     return null;
   }
 
-  public static String compressIPv6Address(String ipString) {
-    if (ipString.contains(":0000:0000:0000:0000:")) {
-      ipString = ipString.replace(":0000:0000:0000:0000:", "::");
-    } else if (ipString.contains(":0000:0000:0000:")) {
-      ipString = ipString.replace(":0000:0000:0000:", "::");
-    } else if (ipString.contains(":0000:0000:")) {
-      ipString = ipString.replace(":0000:0000:", "::");
-    } else if (ipString.contains(":0000:")) {
-      ipString = ipString.replace(":0000:", "::");
-    }
-    while (ipString.contains(":0")) {
-      ipString = ipString.replaceAll(":0", ":");
-    }
-    return ipString;
-  }
-
   public byte[] getIPv6Address() {
     byte[] ip = null;
 
@@ -169,23 +148,6 @@ public class IPAddress extends MoteInterface {
     return ip;
   }
 
-  public static String getUncompressedIPv6AddressString(byte[] ip) {
-    StringBuilder sb = new StringBuilder();
-    for (int i = 0; i < 14; i += 2) {
-      sb.append(String.format("%02x%02x:", 0xFF & ip[i + 0], 0xFF & ip[i + 1]));
-    }
-    sb.append(String.format("%02x%02x", 0xFF & ip[14], 0xFF & ip[15]));
-    return sb.toString();
-  }
-
-  public String getUncompressedIPv6Address() {
-    byte[] ip = getIPv6Address();
-    if (ip == null) {
-      return "";
-    }
-    return getUncompressedIPv6AddressString(ip);
-  }
-
   /**
    * @return True if mote has an IPv4 address
    */
diff --git a/tools/cooja/java/org/contikios/cooja/plugins/BufferListener.java b/tools/cooja/java/org/contikios/cooja/plugins/BufferListener.java
index aa668b66b..2a67d0243 100644
--- a/tools/cooja/java/org/contikios/cooja/plugins/BufferListener.java
+++ b/tools/cooja/java/org/contikios/cooja/plugins/BufferListener.java
@@ -104,6 +104,7 @@ import org.contikios.cooja.mote.memory.MemoryInterface.SegmentMonitor;
 import org.contikios.cooja.mote.memory.VarMemory;
 import org.contikios.cooja.motes.AbstractEmulatedMote;
 import org.contikios.cooja.util.ArrayQueue;
+import org.contikios.cooja.util.IPUtils;
 import org.contikios.cooja.util.StringUtils;
 
 /**
@@ -1696,7 +1697,7 @@ public class BufferListener extends VisPlugin {
       } else {
         mem = ba.mem;
       }
-      return IPAddress.compressIPv6Address(StringUtils.toHex(mem, 2).replaceAll(" ", ":"));
+      return IPUtils.getCompressedIPv6AddressString(mem);
     }
   }
 
@@ -1708,15 +1709,7 @@ public class BufferListener extends VisPlugin {
       if (ba.mem.length < 4) {
         return "[must monitor at least 4 bytes]";
       }
-      StringBuilder sb = new StringBuilder();
-      sb.append(0xff&ba.mem[0]);
-      sb.append(".");
-      sb.append(0xff&ba.mem[1]);
-      sb.append(".");
-      sb.append(0xff&ba.mem[2]);
-      sb.append(".");
-      sb.append(0xff&ba.mem[3]);
-      return sb.toString();
+      return IPUtils.getIPv4AddressString(ba.mem);
     }
   }
 
diff --git a/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPHCPacketAnalyzer.java b/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPHCPacketAnalyzer.java
index b6121c6ce..80b1c72cb 100644
--- a/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPHCPacketAnalyzer.java
+++ b/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPHCPacketAnalyzer.java
@@ -1,6 +1,6 @@
 package org.contikios.cooja.plugins.analyzers;
 
-import org.contikios.cooja.util.StringUtils;
+import org.contikios.cooja.util.IPUtils;
 
 public class IPHCPacketAnalyzer extends PacketAnalyzer {
 
@@ -466,9 +466,9 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
             .append(", FL = ").append(flowLabel)
             .append("<br>");
     verbose.append("From ");
-    printAddress(verbose, srcAddress);
+    IPUtils.getUncompressedIPv6AddressString(verbose, srcAddress);
     verbose.append("  to ");
-    printAddress(verbose, destAddress);
+    IPUtils.getUncompressedIPv6AddressString(verbose, destAddress);
     if (error != null) {
       verbose.append(" ").append(error);
     }
@@ -496,13 +496,4 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
     }
   }
 
-  public static void printAddress(StringBuilder out, byte[] address) {
-    for (int i = 0; i < 16; i += 2) {
-      out.append(StringUtils.toHex((byte) (address[i] & 0xff))
-              + StringUtils.toHex((byte) (address[i + 1] & 0xff)));
-      if (i < 14) {
-        out.append(":");
-      }
-    }
-  }
 }
diff --git a/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPv6PacketAnalyzer.java b/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPv6PacketAnalyzer.java
index 0d33b0bd3..4ecc99e4a 100644
--- a/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPv6PacketAnalyzer.java
+++ b/tools/cooja/java/org/contikios/cooja/plugins/analyzers/IPv6PacketAnalyzer.java
@@ -1,6 +1,6 @@
 package org.contikios.cooja.plugins.analyzers;
 
-import org.contikios.cooja.util.StringUtils;
+import org.contikios.cooja.util.IPUtils;
 
 public class IPv6PacketAnalyzer extends PacketAnalyzer {
 
@@ -60,23 +60,13 @@ public class IPv6PacketAnalyzer extends PacketAnalyzer {
             .append("</b> TC = ").append(trafficClass)
             .append(" FL: ").append(flowLabel).append("<br>");
     verbose.append("From ");
-    printAddress(verbose, srcAddress);
+    IPUtils.getUncompressedIPv6AddressString(verbose, srcAddress);
     verbose.append("  to ");
-    printAddress(verbose, destAddress);
+    IPUtils.getUncompressedIPv6AddressString(verbose, destAddress);
 
     packet.lastDispatch = (byte) (proto & 0xff);
     packet.level = APPLICATION_LEVEL;
     return ANALYSIS_OK_CONTINUE;
   }
 
-  public static void printAddress(StringBuilder out, byte[] address) {
-    for (int i = 0; i < 16; i += 2) {
-      out.append(StringUtils.toHex((byte) (address[i] & 0xff))
-              + StringUtils.toHex((byte) (address[i + 1] & 0xff)));
-      if (i < 14) {
-        out.append(":");
-      }
-    }
-  }
-
 }