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Phone number formats
Phone number formats

In this article, you will learn about different phone number formats as well as how to use E.164 Standard

Reply Team avatar
Written by Reply Team
Updated over a week ago

There are several formats for phone numbers: local, domestic and international.



(541) 754-3010




The domestic phone number format can be used for calls within the same country as your rented phone number. For example, if you rented a US number, you do not need to add +1 to recipient numbers from the US.

However, we recommend using E.164 formatting for all prospect phone numbers in Reply. This is an internationally-recognized standard phone number format that will help to ensure the deliverability of calls and SMS messages across the globe.

How does E.164 work?

E.164 formatting entails the following:

  1. A + (plus) sign (replacing the international call prefix like 011)

  2. The international country calling code

  3. Local area code

  4. Local phone number

For example, here’s a US-based number in standard local formatting: (415) 555-2671

Here’s the same phone number in E.164 formatting: +14155552671

E.164 Mobile Numbers:

In a number of countries, local dialing may require the addition of a '0' in front of the subscriber number. With E.164 formatting, this '0' should usually be removed.

For example, here’s a UK-based number in standard local formatting: 020 7183 8750

Here’s the same phone number in E.164 formatting: +442071838750

Please note: We only support the following symbols in the phone number field: +, (), -

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