860
Area code
CT
United States geographic area code, in service since 1995-08-28. Part of the 860/959 overlay complex — ten-digit dialing required.
Statusin service
Introduced1995-08-28
JurisdictionCT, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 100.9% of assignable prefixes assigned
As of 09/17/2026
0%799 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 2001-03-26, most recent 2024-03-12.
Area codes serve rate-center geographies, not municipal boundaries. “CT” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 325 | 40.7% |
| 02 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 63 | 7.9% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 60 | 7.5% |
| 04 | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 56 | 7% |
| 05 | PAETEC ITEL, LLC | 50 | 6.3% |
| 06 | NEW CINGULAR WIRELESS PCS, LLC - DC | 44 | 5.5% |
| 07 | METROPCS, INC. | 29 | 3.6% |
| 08 | OMNIPOINT COMMUNICATIONS, INC. - CT | 28 | 3.5% |
| 09 | LEVEL 3 COMMUNICATIONS, LLC - CT | 28 | 3.5% |
| 10 | COMCAST IP PHONE, LLC | 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- 2013-08-27 NPA 959 to Overlay NPA 860 (Connecticut)
- 1995-08-28Area code 860 entered service (created from 203).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2013-08-27 | PL-456 ↗ | NPA 959 to Overlay NPA 860 (Connecticut) |
| 2009-04-14 | PL-388 ↗ | NPA 475 to Overlay NPA 203; NPA 860 10-digit dialing (Connecticut) |
| 2001-01-03 | PL-255 ↗ | Update on the Introduction of NPAs 475 and 959 (Connecticut) |
| 2000-02-24 | PL-217 ↗ | NPA 475 To Overlay NPA 203; NPA 959 To Overlay NPA 860 (Connecticut) |
| 1998-10-05 | PL-138 ↗ | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for Connecticut NPAs 203 & 860 |
| 1995-04-06 | IL-95-04-002 ↗ | NANP-SPLIT OF 203 (CONNECTICUT) NUMBERING PLAN AREA (NPA) |