743
Area code
NC
United States geographic area code, in service since 2016-05-23. Part of the 336/743 overlay complex — ten-digit dialing required.
Statusin service
Introduced2016-05-23
JurisdictionNC, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 22% of assignable prefixes assigned
As of 09/17/2026
0%174 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 2016-04-06, most recent 2026-08-20.
Area codes serve rate-center geographies, not municipal boundaries. “NC” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | ONVOY, LLC - NC | 35 | 20.1% |
| 02 | TON80 COMMUNICATIONS, LLC | 21 | 12.1% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 13 | 7.5% |
| 04 | FRACTEL, LLC | 11 | 6.3% |
| 05 | BANDWIDTH.COM CLEC, LLC - NC | 10 | 5.7% |
| 06 | ONVOY SPECTRUM, LLC | 9 | 5.2% |
| 07 | MULTIPLE OCN LISTING | 9 | 5.2% |
| 08 | SUNCOM DBA T-MOBILE USA | 7 | 4% |
| 09 | METROPCS, INC. | 7 | 4% |
| 10 | 6 | 3.4% |
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- 2015-01-09 NPA 743 to Overlay NPA 336 (North Carolina)
- 2016-05-23Area code 743 entered service (created from 336).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2015-01-09 | PL-475 ↗ | NPA 743 to Overlay NPA 336 (North Carolina) |
| 2014-09-18 | PL-469 ↗ | NPA 743 to Overlay NPA 336 (North Carolina) |