diff --git a/src/utils/index.ts b/src/utils/index.ts
index 941eeda1a..f53f01019 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -164,6 +164,21 @@ export async function updateResourceInHearth(resource: fhir.ResourceBase) {
   return res.text()
 }
 
+export const convertToMSISDN = (phone: string, countryAlpha3: string) => {
+  const countryCode = callingCountries[countryAlpha3.toUpperCase()].alpha2
+
+  const phoneUtil = PhoneNumberUtil.getInstance()
+  const number = phoneUtil.parse(phone, countryCode)
+
+  return (
+    phoneUtil
+      .format(number, PhoneNumberFormat.INTERNATIONAL)
+      // libphonenumber adds spaces and dashes to phone numbers,
+      // which we do not want to keep for now
+      .replace(/[\s-]/g, '')
+  )
+}
+
 const csvStringify = promisify<Array<Record<string, any>>, Options>(stringify)
 export async function writeJSONToCSV(
   filename: string,
diff --git a/typings/country-data.d.ts b/typings/country-data.d.ts
new file mode 100644
index 000000000..7f2dd2e33
--- /dev/null
+++ b/typings/country-data.d.ts
@@ -0,0 +1,11 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * OpenCRVS is also distributed under the terms of the Civil Registration
+ * & Healthcare Disclaimer located at http://opencrvs.org/license.
+ *
+ * Copyright (C) The OpenCRVS Authors located at https://github.com/opencrvs/opencrvs-core/blob/master/AUTHORS.
+ */
+declare module 'country-data'