47 CFR § 52.21 - Definitions

Publisher

Legal Information Institute (Cornell Law School), reproducing the Code of Federal Regulations

URL

https://www.law.cornell.edu/cfr/text/47/52.21

Published

2015-10-29

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

US federal regulation text is public domain; LII page presentation is LII's; regulatory text public domain; short excerpts and locators only for LII presentation

Source notes citing this source

• 47 CFR 52.21 defines number portability as users keeping their existing numbers at the same location, without impairing quality, reliability or convenience, when switching carriers. in context
• 47 CFR 52.21 defines the Local Number Portability Administrator as an independent, non-governmental entity that is not aligned with any industry segment and whose duties are determined by the NANC. in context
• 47 CFR 52.21 defines location portability, meaning a user keeps a number when moving between physical locations, separately from number portability between carriers. in context
• 47 CFR 52.21 defines service portability as keeping a number when switching from one telecommunications service to another without changing carrier. in context
• FCC rules define the database method of number portability as one that uses one or more external databases to provide called-party routing information. in context
• FCC rules define number portability as retaining existing numbers at the same location when switching carriers; keeping a number while moving location is defined separately as location portability. in context

Cite this source record

APA

WarmTransfer. (2015, October 29). 47 CFR § 52.21 - Definitions. WarmTransfer. https://warmtransfer.net/knowledge/sources/cornell-lii-47-cfr-52-21

BibTeX

@misc{warmtransfer-cornell-lii-47-cfr-52-21,
  title  = {47 CFR § 52.21 - Definitions},
  author = {{WarmTransfer}},
  year   = {2015},
  url    = {https://warmtransfer.net/knowledge/sources/cornell-lii-47-cfr-52-21},
  note   = {Legal Information Institute (Cornell Law School), reproducing the Code of Federal Regulations, accessed 2026-09-24}
}