diff --git a/src/main/java/com/solab/iso8583/codecs/BigIntBcdCodec.java b/src/main/java/com/solab/iso8583/codecs/BigIntBcdCodec.java
new file mode 100644
index 0000000..7ddb00b
--- /dev/null
+++ b/src/main/java/com/solab/iso8583/codecs/BigIntBcdCodec.java
@@ -0,0 +1,40 @@
+package com.solab.iso8583.codecs;
+
+import com.solab.iso8583.CustomBinaryField;
+import com.solab.iso8583.util.Bcd;
+
+import java.math.BigInteger;
+
+/**
+ * A custom field encoder/decoder to be used with LLBIN/LLLBIN fields
+ * that contain BigIntegers in BCD encoding.
+ *
+ * @author Enrique Zamudio
+ *         Date: 07/05/13 13:02
+ */
+public class BigIntBcdCodec implements CustomBinaryField<BigInteger> {
+
+    @Override
+    public BigInteger decodeBinaryField(byte[] value, int pos, int len) {
+        return Bcd.decodeToBigInteger(value, pos, len*2);
+    }
+
+    @Override
+    public byte[] encodeBinaryField(BigInteger value) {
+        final String s = value.toString(10);
+        final byte[] buf = new byte[s.length() / 2 + s.length() % 2];
+        Bcd.encode(s, buf);
+        return buf;
+    }
+
+    @Override
+    public BigInteger decodeField(String value) {
+        return new BigInteger(value, 10);
+    }
+
+    @Override
+    public String encodeField(BigInteger value) {
+        return value.toString(10);
+    }
+
+}
diff --git a/src/main/java/com/solab/iso8583/codecs/LongBcdCodec.java b/src/main/java/com/solab/iso8583/codecs/LongBcdCodec.java
new file mode 100644
index 0000000..e8c002b
--- /dev/null
+++ b/src/main/java/com/solab/iso8583/codecs/LongBcdCodec.java
@@ -0,0 +1,37 @@
+package com.solab.iso8583.codecs;
+
+import com.solab.iso8583.CustomBinaryField;
+import com.solab.iso8583.util.Bcd;
+
+/**
+ * A custom field encoder/decoder to be used with LLBIN/LLLBIN fields
+ * that contain Longs in BCD encoding.
+ *
+ * @author Enrique Zamudio
+ *         Date: 07/05/13 13:02
+ */
+public class LongBcdCodec implements CustomBinaryField<Long> {
+
+    @Override
+    public Long decodeBinaryField(byte[] value, int pos, int length) {
+        return Bcd.decodeToLong(value, pos, length*2);
+    }
+
+    @Override
+    public byte[] encodeBinaryField(Long value) {
+        final String s = Long.toString(value, 10);
+        final byte[] buf = new byte[s.length() / 2 + s.length() % 2];
+        Bcd.encode(s, buf);
+        return buf;
+    }
+
+    @Override
+    public Long decodeField(String value) {
+        return Long.parseLong(value, 10);
+    }
+
+    @Override
+    public String encodeField(Long value) {
+        return value.toString();
+    }
+}