305
Area code

FL

United States geographic area code, in service since 1947-01-01. Part of the 305/645/786 overlay complex — ten-digit dialing required.

Created 407. Created 954. Created 786. Created 645. Overlaid with 645, 786 .

Statusin service
Introduced1947-01-01
JurisdictionFL, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 100.8% of assignable prefixes assigned As of 09/17/2026
0%798 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 2001-01-02, most recent 2026-03-31.

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
Largest initial assignees in area code 305
RankAssigneePrefixesShare
01 BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 363 45.5%
02 NEW CINGULAR WIRELESS PCS, LLC - GA 92 11.5%
03 METROPCS, INC. 49 6.1%
04 OMNIPOINT MIAMI E LICENSE, LLC 43 5.4%
05 SPOK, INC. 42 5.3%
06 ABC PAGING CITY BEEPERS, INC. 38 4.8%
07 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 36 4.5%
08 PAETEC ITEL, LLC 17 2.1%
09 TELEPORT COMMUNICATIONS AMERICA, LLC - FL 16 2%
10 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 15 1.9%

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

Planning letters & orders

Primary documents
NANPA planning letters for area code 305
DateDocumentSubject
2022-04-14 PL-588 ↗ NPA 645 to Overlay NPA 305/786 (Florida)
2014-08-29 PL-468 ↗ Expansion of the Concentrated NPA 786 Overlay with NPA 305 (Florida)
2001-07-12 PL-287 ↗ Permissive Seven or Ten Digit Dialing 305 NPA (Keys Area)

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