E.164 Number Format
Short definition
E.164 Number Format: The international telephone-numbering format combining a country code and national number.
Meaning and how it works
The number combines a country code with a national significant number; the plus sign indicates international notation, not a digit. Telephone numbering depends on national rules, carrier capabilities and the selected calling route. Customers benefit from consistent dialling formats and reliable number reachability.
Business applications
- Business scenario:
A CRM stores international phone numbers consistently so dialling and messaging systems can interpret them.
What to check before implementation
Before deployment, verify geographical availability, permitted number formats, tariffs, caller-ID restrictions and both inbound and outbound calling behaviour.