Fuentes
Cada afirmación sobre normas o precios en esta página enlaza a su fuente primaria, a menudo en inglés. Las normas y los precios cambian: verifique antes de confiar en una cifra.
- ITU-T Recommendation E.164, The international public telecommunication numbering plan. Consultado el 14 Oct 2026
https://www.itu.int/rec/T-REC-E.164 - NANPA, About NANPA: neutral administration of North American Numbering Plan resources. Consultado el 14 Oct 2026
https://www.nanpa.com/about - 47 CFR § 52.35, Porting intervals (one business day for a simple port request, four for a non-simple one). Consultado el 14 Oct 2026
https://www.law.cornell.edu/cfr/text/47/52.35 - Federal Register, Local Number Portability Porting Interval and Validation Requirements; Telephone Number Portability, 75 FR 35305 (22 June 2010). Published 22 June 2010
https://www.federalregister.gov/documents/2010/06/22/2010-15073/local-number-portability-porting-interval-and-validation-requirements-telephone-number-portability - 47 CFR § 9.16, Multi-line telephone systems: direct 911 dialing, notification, and dispatchable location. Consultado el 14 Oct 2026
https://www.law.cornell.edu/cfr/text/47/9.16 - 47 U.S.C. § 623, Configuration of multi-line telephone systems for direct dialing of 9-1-1 (Kari’s Law). Consultado el 14 Oct 2026
https://www.law.cornell.edu/uscode/text/47/623 - 47 CFR § 64.6301, Caller ID authentication (STIR/SHAKEN implementation by voice service providers). Consultado el 14 Oct 2026
https://www.law.cornell.edu/cfr/text/47/64.6301 - Government of Canada, Telecommunications Act (S.C. 1993, c. 38), Justice Laws Website. Consultado el 14 Oct 2026
https://laws-lois.justice.gc.ca/eng/acts/t-3.4/