diff --git a/src/core/operations/ChangeIPFormat.mjs b/src/core/operations/ChangeIPFormat.mjs
new file mode 100644
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--- /dev/null
+++ b/src/core/operations/ChangeIPFormat.mjs
@@ -0,0 +1,121 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Utils from "../Utils";
+import {fromHex} from "../lib/Hex";
+
+/**
+ * Change IP format operation
+ */
+class ChangeIPFormat extends Operation {
+
+ /**
+ * ChangeIPFormat constructor
+ */
+ constructor() {
+ super();
+
+ this.name = "Change IP format";
+ this.module = "JSBN";
+ this.description = "Convert an IP address from one format to another, e.g. 172.20.23.54
to ac141736
";
+ this.inputType = "string";
+ this.outputType = "string";
+ this.args = [
+ {
+ "name": "Input format",
+ "type": "option",
+ "value": ["Hex", "Raw"]
+ },
+ {
+ "name": "Output format",
+ "type": "option",
+ "value": ["Hex", "Raw"]
+ }
+ ];
+ }
+
+ /**
+ * @param {string} input
+ * @param {Object[]} args
+ * @returns {string}
+ */
+ run(input, args) {
+ const inFormat = args[0],
+ outFormat = args[1],
+ lines = input.split("\n");
+ let output = "",
+ j = 0;
+
+
+ for (let i = 0; i < lines.length; i++) {
+ if (lines[i] === "") continue;
+ let baIp = [];
+ let octets;
+ let decimal;
+
+ if (inFormat === outFormat) {
+ output += lines[i] + "\n";
+ continue;
+ }
+
+ // Convert to byte array IP from input format
+ switch (inFormat) {
+ case "Dotted Decimal":
+ octets = lines[i].split(".");
+ for (j = 0; j < octets.length; j++) {
+ baIp.push(parseInt(octets[j], 10));
+ }
+ break;
+ case "Decimal":
+ decimal = lines[i].toString();
+ baIp.push(decimal >> 24 & 255);
+ baIp.push(decimal >> 16 & 255);
+ baIp.push(decimal >> 8 & 255);
+ baIp.push(decimal & 255);
+ break;
+ case "Hex":
+ baIp = fromHex(lines[i]);
+ break;
+ default:
+ throw "Unsupported input IP format";
+ }
+
+ let ddIp;
+ let decIp;
+ let hexIp;
+
+ // Convert byte array IP to output format
+ switch (outFormat) {
+ case "Dotted Decimal":
+ ddIp = "";
+ for (j = 0; j < baIp.length; j++) {
+ ddIp += baIp[j] + ".";
+ }
+ output += ddIp.slice(0, ddIp.length-1) + "\n";
+ break;
+ case "Decimal":
+ decIp = ((baIp[0] << 24) | (baIp[1] << 16) | (baIp[2] << 8) | baIp[3]) >>> 0;
+ output += decIp.toString() + "\n";
+ break;
+ case "Hex":
+ hexIp = "";
+ for (j = 0; j < baIp.length; j++) {
+ hexIp += Utils.hex(baIp[j]);
+ }
+ output += hexIp + "\n";
+ break;
+ default:
+ throw "Unsupported output IP format";
+ }
+ }
+
+ return output.slice(0, output.length-1);
+ }
+
+}
+
+export default ChangeIPFormat;