Keys, FL — rate center

NANPA rate center & CO code data, current as of July 28, 2026.

Phone numbers "from Keys" are, precisely speaking, numbers whose prefixes are anchored to the Keys rate center of Florida, under 305, 645, 786.

The rate center currently carries 181 working prefixes across 29 carriers. 161 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.

The rate center belongs to the Miami-Fort Lauderdale-Pompano-West Palm Beach, FL Metropolitan Statistical Area. Routing-wise it sits in LATA 460.

Multiple area codes over one rate center (305/645/786) is the overlay pattern: same geography, different first three digits.

At 181 prefixes — a ceiling of 1,810,000 numbers — Keys is one of Florida's heavyweight rate centers.

A Keys prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.

Prefixes anchored to Keys

FAQ

What area code is Keys, FL?

Keys is served by 3 area codes — 305, 645, 786 — which overlay the same territory.

How many prefixes does Keys have?

181 active NXX prefixes are anchored to this rate center in NANPA records, held by 29 carriers.

Is a call from a Keys prefix really from Keys?

Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.