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Area Code Overview
Area code 959 is a geographic telephone area code in Connecticut that went into service on August 30, 2014. The geographic regions covered by this area code overlay has a population of approximately 1,729,388.
Overlay and Dialing Rules
- Area Code: 959
- State: Connecticut
- Type: General Purpose Code
- In Service Date: August 30, 2014
- Overlay Complex: 860/959
- Local Dialing Plan: This area does require you to dial the area code when calling locally.
Estimated Number of Assigned Phone Numbers in Area Code 959
This area code is ranked 311th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 4th out of 4.
1,328,000
Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 959
Wireline and VoIP
735,000 assigned
55.35%
Other / Unclassified
161,000 assigned
12.12%
Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 959
Estimated assigned wireless phone numbers: 432,000
Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.
Verizon Wireless 184,000 (42.59%)
T-Mobile 153,000 (35.42%)
AT&T Wireless 92,000 (21.30%)
Optimum Mobile 3,000 (0.69%)
Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 959
Estimated assigned wireline and VoIP phone numbers: 735,000
Spectrum 131,000 (17.82%)
Peerless Network 27,000 (3.67%)
Comcast Business 22,000 (2.99%)
EON TELECOM, INC. 20,000 (2.72%)
PAETEC ITEL, LLC 15,000 (2.04%)
Other / Unclassified Assigned Numbering in Area Code 959
Estimated assigned other or unclassified phone numbers: 161,000
TELEPORT COMMUNICATIONS AMERICA, LLC - CT 67,000 (41.61%)
IP HORIZON LLC 36,000 (22.36%)
TON80 COMMUNICATIONS, LLC 33,000 (20.50%)
FRACTEL, LLC 10,000 (6.21%)
BARR TEL USA, INC. - CT 9,000 (5.59%)
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2,000 (1.24%)
CSC VOICE, LLC 1,000 (0.62%)
EXIANT COMMUNICATIONS LLC 1,000 (0.62%)
HD CARRIER LLC 1,000 (0.62%)
WAVENATION, LLC 1,000 (0.62%)
Cities and Towns in Area Code 959
Bristol, Connecticut Canaan, Connecticut Canterbury, Connecticut Canton, Connecticut Clinton, Connecticut Colchester, Connecticut Columbia, Connecticut Cornwall, Connecticut Coventry, Connecticut Danielson, Connecticut Deep River, Connecticut East Hampton, Connecticut Enfield, Connecticut Essex, Connecticut Farmington, Connecticut Glastonbury, Connecticut Haddam, Connecticut Hartford, Connecticut Harwinton, Connecticut Jewett City, Connecticut Kent, Connecticut Killingworth, Connecticut Lakeville, Connecticut Lebanon, Connecticut Ledyard, Connecticut Litchfield, Connecticut Lyme Station, Connecticut Manchester, Connecticut Middletown, Connecticut Moodus, Connecticut Mystic, Connecticut New Britain, Connecticut New London, Connecticut New Milford, Connecticut Niantic, Connecticut Norfolk, Connecticut Norwich, Connecticut Old Saybrook, Connecticut Pawcatuck, Connecticut Plainfield, Connecticut Plainville, Connecticut Putnam, Connecticut Rockville, Connecticut Sharon, Connecticut Simsbury, Connecticut Southington, Connecticut Stafford Springs, Connecticut Storrs, Connecticut Thomaston, Connecticut Torrington, Connecticut Washington, Connecticut Watertown, Connecticut Willimantic, Connecticut Windsor, Connecticut Winsted, Connecticut These geographic regions are also served by area code 860.
How These Figures Were Built
These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 959, not live customer counts.
Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.
They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.
Population data and locality matching provided by GeoNames.
Last refreshed: April 15, 2026 6:22 pm