Understanding E.164 Format

A deep dive into the international telephone numbering plan.

2024-11-25•Technical

What is E.164?

E.164 is the international standard for phone number formats. It ensures that every number is unique worldwide.

It consists of a country code (e.g., +1), a national destination code, and a subscriber number. The maximum length is 15 digits.

Generate E.164-ready numbers

Output global E.164 strings for telecom APIs.

You’ll land on the tool with the Global E.164 preset prefilled (100 numbers, E.164 format). Click “Generate numbers” to copy or export.