678
Area code
GA
United States geographic area code, in service since 1998-01-06. Part of the 404/470/678/770/943 overlay complex — ten-digit dialing required.
Statusin service
Introduced1998-01-06
JurisdictionGA, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 101% of assignable prefixes assigned
As of 09/17/2026
0%800 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 2023-12-05.
Area codes serve rate-center geographies, not municipal boundaries. “GA” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | PAETEC ITEL, LLC | 159 | 19.9% |
| 02 | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 123 | 15.4% |
| 03 | LEVEL 3 COMMUNICATIONS, LLC - GA | 94 | 11.8% |
| 04 | METROPCS, INC. | 64 | 8% |
| 05 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 56 | 7% |
| 06 | POWERTEL ATLANTA LICENSES, INC. | 55 | 6.9% |
| 07 | NEW CINGULAR WIRELESS PCS, LLC - GA | 48 | 6% |
| 08 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 36 | 4.5% |
| 09 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 28 | 3.5% |
| 10 | LEVEL 3 TELECOM OF GEORGIA, LP - GA | 26 | 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- 1998-01-06Area code 678 entered service (created from 470).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-05-10 | PL-559 ↗ | NPA 943 to Overlay NPA 404/470/678/770 (Georgia) supersedes PL-555 |
| 1997-11-21 | PL-102 ↗ | NANP-Overlay of 770 and 404 Numbering Plan Areas (NPA) in Georgia |