Skip to content
English
Sign in
  • There are no suggestions because the search field is empty.

Forbidden Extension Numbers

Certain extension numbers are not allowed due to potential conflicts with 911 services and potential misdialing's.

Extensions which are not allowed:
 
'000', '211', '311', '411', '611', '711', '811', '911', '933', '999'
 
When creating or deploying a customer, an error message will be displayed if trying to create an extension with one of these numbers.
 
image.png
 
See FCC for more information.