### Question
What is the definition of number portability?


### Answer
The definition of **number portability** is as follows in *47 U.S.C. § 153*:

> the ability of users of telecommunications services to retain, at the same location, existing telecommunications numbers without impairment of quality, reliability, or convenience when switching from one telecommunications carrier to another

#### Citation:
  - *47 U.S.C. § 153*
  - Heading: **CHAPTER 4-RADIO ACT OF 1927 > SUBCHAPTER I-GENERAL PROVISIONS**

