Phone number management for the United States

Publisher

Microsoft

URL

https://learn.microsoft.com/en-us/microsoftteams/phone-reference/manage-numbers/phone-number-management-for-the-u-s

Published

2023-05-15

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Microsoft Learn content; verify license before reuse; no-redistribution; short excerpts and locators only

Source notes citing this source

• For US Microsoft Calling Plan ports, changes must be requested at least 2 business days, and cancellations at least 1 business day, before the approved port date. in context
• In the US, toll-free numbers ported to Microsoft Calling Plans can serve voice apps and audio conferencing but not user assignments. in context
• For US ports, changes must be requested at least 2 business days, and cancellations at least 1 business day, before the approved porting date. in context
• The US country page gives an approximate porting time of 5 to 12 business days for US numbers. disputed in context
• For US ports, Microsoft publishes two separate LOA forms, one for geographic user, voice app and conferencing numbers and one for toll-free numbers. Microsoft highly recommends also supplying the CSR from the losing carrier and a recent invoice. in context
• In the US, geographic numbers can be ported as user, voice app or audio conferencing numbers, but toll-free numbers can be ported only for voice apps or audio conferencing, not as user numbers. in context

Cite this source record

APA

WarmTransfer. (2023, May 15). Phone number management for the United States. WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-phone-number-mgmt-us

BibTeX

@misc{warmtransfer-ms-learn-phone-number-mgmt-us,
  title  = {Phone number management for the United States},
  author = {{WarmTransfer}},
  year   = {2023},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-phone-number-mgmt-us},
  note   = {Microsoft, accessed 2026-09-24}
}