diff --git a/google-libphonenumber/google-libphonenumber-tests.ts b/google-libphonenumber/google-libphonenumber-tests.ts
new file mode 100644
index 0000000000..0768f0f7a9
--- /dev/null
+++ b/google-libphonenumber/google-libphonenumber-tests.ts
@@ -0,0 +1,36 @@
+/// <reference path="google-libphonenumber.d.ts" />
+
+import libphonenumber = require('google-libphonenumber');
+import {PhoneNumberFormat, PhoneNumberUtil, AsYouTypeFormatter} from 'google-libphonenumber';
+
+() => {
+    // Require `PhoneNumberFormat`.
+    var PNF = libphonenumber.PhoneNumberFormat;
+
+    // Get an instance of `PhoneNumberUtil`.
+    var phoneUtil = libphonenumber.PhoneNumberUtil.getInstance();
+
+    // Parse number with country code.
+    var phoneNumber = phoneUtil.parse('202-456-1414', 'US');
+
+    // Print number in the international format.
+    console.log(phoneUtil.format(phoneNumber, PNF.INTERNATIONAL));
+    // => +1 202-456-1414
+}
+
+() => {
+    // Require `AsYouTypeFormatter`.
+    var AsYouTypeFormatter = libphonenumber.AsYouTypeFormatter;
+    var formatter = new AsYouTypeFormatter('US');
+
+    console.log(formatter.inputDigit('6')); // => 6
+    console.log(formatter.inputDigit('5')); // => 65
+    console.log(formatter.inputDigit('0')); // => 650
+    console.log(formatter.inputDigit('2')); // => 650-2
+    console.log(formatter.inputDigit('5')); // => 650-25
+    console.log(formatter.inputDigit('3')); // => 650-253
+    console.log(formatter.inputDigit('2')); // => 650-2532
+    console.log(formatter.inputDigit('2')); // => (650) 253-22
+
+    formatter.clear();
+}
diff --git a/google-libphonenumber/google-libphonenumber.d.ts b/google-libphonenumber/google-libphonenumber.d.ts
new file mode 100644
index 0000000000..fea36d9675
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+++ b/google-libphonenumber/google-libphonenumber.d.ts
@@ -0,0 +1,38 @@
+// Type definitions for libphonenumber v7.4.3
+// Project: https://github.com/googlei18n/libphonenumber
+// Project: https://github.com/seegno/google-libphonenumber
+// Definitions by: Leon Yu <https://github.com/leonyu>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace libphonenumber {
+    export enum PhoneNumberFormat {
+        E164,
+        INTERNATIONAL,
+        NATIONAL,
+        RFC3966
+    }
+
+    interface PhoneNumber {
+    }
+
+    export class PhoneNumberUtil {
+        static getInstance(): PhoneNumberUtil
+        parse(number: string, region: string): PhoneNumber;
+        isValidNumber(phoneNumber: PhoneNumber): boolean;
+        isValidNumberForRegion(phoneNumber: PhoneNumber): boolean;
+        getRegionCodeForNumber(phoneNumber: PhoneNumber): string;
+        isNANPACountry(regionCode: string): boolean;
+        format(phoneNumber: PhoneNumber, format: PhoneNumberFormat): string;
+    }
+
+    export class AsYouTypeFormatter {
+        constructor(region: string);
+        inputDigit(digit: string): string;
+        clear(): void;
+    }
+}
+
+
+declare module 'google-libphonenumber' {
+    export = libphonenumber;
+}