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8x8 Support

Three digit extensions to avoid using with the internal numbering plan

Objective

Some 3-digit extension numbers are being used by certain 8x8 services, and we highly recommend against using these as user extensions.

Applies To

  • 8x8 Work

Procedure

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, please avoid using the below extension numbers in your internal numbering plan, as it will start causing issues with your services when dialling them.

 444  463   577 
 620   464   614 
 557   465   595 
 500   466   588 
 615   467   587
 460   468   593 
 601   469   570 
 602   591   559 
 603   442   590 
 604   443   599 
 605   610   594 
 461   556  441 
 470   598   555
 462   612