E164 Format
E.164 is the international telephone numbering plan that ensures each device on the PSTN has globally unique number.
This number allows phone calls and text messages can be correctly routed to individual phones in different countries. E.164 numbers are formatted [+] [country code] [subscriber number including area code] and can have a maximum of fifteen digits.
Examples of E.164 Numbers
| E.164 Format | Country Code | Country | Subscriber Number (including area code) |
| +16175550011 | 1 | US | 6175550011 |
| +528882927942 | 52 | MX | 8882927942 |
| +441632960375 | 44 | UK | 1632960375 |
Where is E164 Format required?
There are 3 places in the Regal app where the exact E164 format is required.
AI Agent Builder > Transfer Call Action > Transfer to Phone Number
IVR Split Node > "Called From" Contact Phone Number
IVR Forward Node > "Forward To" Number
