484
Area code
PA
United States geographic area code, in service since 1999-06-05. Part of the 484/610/835 overlay complex — ten-digit dialing required.
Statusin service
Introduced1999-06-05
JurisdictionPA, 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 2001-01-16, most recent 2023-05-30.
Area codes serve rate-center geographies, not municipal boundaries. “PA” 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 | 152 | 19% |
| 02 | LEVEL 3 COMMUNICATIONS, LLC - PA | 129 | 16.1% |
| 03 | ONVOY, LLC - PA | 78 | 9.8% |
| 04 | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 62 | 7.8% |
| 05 | NEW CINGULAR WIRELESS PCS, LLC - DC | 53 | 6.6% |
| 06 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 45 | 5.6% |
| 07 | CORE COMMUNICATIONS, INC. - PA | 29 | 3.6% |
| 08 | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 26 | 3.3% |
| 09 | VERIZON PENNSYLVANIA, INC. | 25 | 3.1% |
| 10 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 21 | 2.6% |
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- 2022-01-13 NPA 835 to Overlay NPA 484/610 (Pennsylvania)
- 1999-06-05Area code 484 entered service (created from 610).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-01-13 | PL-578 ↗ | NPA 835 to Overlay NPA 484/610 (Pennsylvania) |
| 2005-06-23 | PL-344 ↗ | PA 835 Implementation for 484/610 NPA Rescinded - 835 NPA Code Reclaimed |
| 2000-07-27 | PL-237 ↗ | NPA 445 to Overlay NPAs 215 and 267 (Pennsylvania) NPA 835 to Overlay NPAs 610 and 484 (Pennsylvania) |
| 1999-11-29 | PL-199 ↗ | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 484 and 610 NPAs (Pennsylvannia) |
| 1998-07-31 | PL-135 ↗ | NANP-Overlay of 610 (Pennsylvania) Numbering Plan Area (NPA) with 484 NPA |