HRS §269-36
Phone number portability
This section says the state must make it possible for you to keep your phone number when you switch providers within the same area, as soon as it's practical. A neutral group will handle phone numbers and give them out fairly.
everyone
The statute, as written — Telecommunications number portability
The commission shall ensure that telecommunications number portability within an exchange is available, upon request, as soon as technically feasible and economically reasonable. An impartial entity shall administer telecommunications numbering and make the numbers available on an equitable basis.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.