645
Area code
FL
United States geographic area code, in service since 2023-08-04. Part of the 305/645/786 overlay complex — ten-digit dialing required.
Statusin service
Introduced2023-08-04
JurisdictionFL, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 11.6% of assignable prefixes assigned
As of 09/17/2026
0%92 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2023-10-19, most recent 2026-09-10.
Area codes serve rate-center geographies, not municipal boundaries. “FL” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | NEW CINGULAR WIRELESS PCS, LLC - GA | 17 | 18.5% |
| 02 | ONVOY, LLC - FL | 15 | 16.3% |
| 03 | WIDE VOICE, LLC - FL | 9 | 9.8% |
| 04 | MULTIPLE OCN LISTING | 9 | 9.8% |
| 05 | OMNIPOINT MIAMI E LICENSE, LLC | 5 | 5.4% |
| 06 | IP HORIZON LLC | 5 | 5.4% |
| 07 | EON TELECOM, INC. | 5 | 5.4% |
| 08 | 5 | 5.4% | |
| 09 | ONVOY SPECTRUM, LLC | 3 | 3.3% |
| 10 | LIVEWIRE TELECOM, LLC | 3 | 3.3% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 2022-04-14 NPA 645 to Overlay NPA 305/786 (Florida)
- 2023-08-04Area code 645 entered service (created from 305).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-04-14 | PL-588 ↗ | NPA 645 to Overlay NPA 305/786 (Florida) |