566 area code — NANP AREA non-geographic

Data: NANPA public reports, current as of July 28, 2026.

Scope
Non-geographic
Time zone
Eastern
In service since
2012-04-17
Split from
500
Overlay complex
500 / 521 / 522 / 523 / 524 / 525 / 526 / 527 / 528 / 529 / 532 / 533 / 538 / 542 / 544 / 566 / 577 / 588

The 566 area code covers NANP AREA, Eastern time zone, and dates back to April 17, 2012. Together with 500, 533, 544, 577, 588, 521, 522, 523, 524, 525, 526, 527, 528, 529, 532, 538, 542 it forms the 500/521/522/523/524/525/526/527/528/529/532/533/538/542/544/566/577/588 overlay. Because of number portability and VoIP, the area code tells you where the number was issued, not where the caller is right now.

Its parent code is 500, which it left in 2012.

Use this page to decode where 566 numbers come from — and remember that spoofing means the screen can lie about everything except your own caution.

566 is a non-geographic service code (Non-Geographic Services): it is not tied to any state or rate center, and its numbers are assigned under service-specific rules rather than the geographic central-office process. Public prefix tables therefore do not apply to this code.

FAQ

Where is a 566 number from?

566 is assigned to NANP AREA in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.

Is 566 a toll-free number?

No. 566 is a non-geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.

Why do 500 and 566 cover the same place?

They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 500/521/522/523/524/525/526/527/528/529/532/533/538/542/544/566/577/588 complex shares one service area, and local calls are dialed with 10 digits.

Why am I getting spam calls from 566 numbers?

Scammers spoof real area codes so calls look legitimate. A displayed 566 number does not prove the call originated there — see our guide to spotting spoofed calls.