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

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.

E.164 formatting entails the following:

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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