Three Digit Extensions to Avoid Using With an Internal Numbering Plan
Some 3-digit extension numbers are being used by certain 8x8 services, and we highly recommend against using these as user extensions.
- 8x8 Work
- Contact Center
We highly recommend using 4-digit extensions for your internal numbering plan instead of 3-digit ones. If you would still need to use 3-digit extensions, avoid using the below extension numbers in your internal numbering plan, as it will start causing issues with your services when dialing them.
These should not be used as 8x8 Work or Contact Center extensions.