640
Area code
NJ
United States geographic area code, in service since 2018-09-17. Part of the 609/640 overlay complex — ten-digit dialing required.
Statusin service
Introduced2018-09-17
JurisdictionNJ, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 18.3% of assignable prefixes assigned
As of 09/17/2026
0%145 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 2018-11-26, most recent 2026-09-10.
Area codes serve rate-center geographies, not municipal boundaries. “NJ” 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 - DC | 33 | 22.8% |
| 02 | ONVOY, LLC - NJ | 27 | 18.6% |
| 03 | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 16 | 11% |
| 04 | MULTIPLE OCN LISTING | 9 | 6.2% |
| 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 8 | 5.5% |
| 06 | FRACTEL, LLC | 7 | 4.8% |
| 07 | BANDWIDTH.COM CLEC, LLC - NJ | 7 | 4.8% |
| 08 | ONVOY SPECTRUM, LLC | 5 | 3.4% |
| 09 | 5 | 3.4% | |
| 10 | TON80 COMMUNICATIONS, LLC | 4 | 2.8% |
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- 2017-05-26 NPA 640 to Overlay NPA 609 (New Jersey)
- 2018-09-17Area code 640 entered service (created from 609).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2017-05-26 | PL-508 ↗ | NPA 640 to Overlay NPA 609 (New Jersey) |