Area code 959: Connecticut
Area code 959 is a US state area code for Connecticut, on Eastern Time. It has 162 prefixes in service across 52 rate centers, the largest being Hartford, New Britain and New London. It shares its area with 860, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 959
America/New_York
Prefixes in service
162 of 792 possible
52 rate centers
Area code 959 facts
| Location | Connecticut, United States |
|---|---|
| Time zone | Eastern Time |
| Overlays | 860 |
| Overlay of | 860 |
| In service since | August 30, 2014 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 959?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 959 rate centers with the most prefixes in service. 40 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Hartford | 37 |
| New Britain | 8 |
| New London | 7 |
| Torrington | 6 |
| Willimantic | 6 |
| Norwich | 6 |
| Southington | 4 |
| Deep River | 4 |
| Bristol | 4 |
| Glastonbury | 4 |
| Farmington | 3 |
| Essex | 3 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 959 number?
NANPA's dialling plan for 959: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 959 | 959-555-0147 |
|---|---|
| From another US or Canadian area code | 1-959-555-0147 |
| From outside North America | +1 959 555 0147 |
| E.164, for CRMs and SMS tools | +19595550147 |
When did area code 959 start?
Area code 959 went into service on August 30, 2014 as an overlay of 860. Today 959 and 860 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 959 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 959 number tells you where it was issued, not what it is now.
Mobiles, landlines and VoIP lines share area codes, and numbers move between carriers. A live line-type and carrier lookup on every number in your list says which is which, and that decides which calling and texting rules apply. It's in the Email + Phone plan.
- Drop your list as a CSV
- See its rows, duplicates and bad formats, free
- 100 free email checks when you sign in with Google, no card
Ready to verify now? See the Email + Phone plan
Area code 959 questions
- What state is area code 959?
- Area code 959 is in Connecticut, United States. Its largest rate centers by number of prefixes are Hartford, New Britain, New London, Torrington and Willimantic.
- What time zone is area code 959 in?
- Eastern Time.
- What area codes overlay 959?
- 860. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 959 start?
- Area code 959 went into service on August 30, 2014 as an overlay of 860.
- Is a 959 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 959 have?
- 162 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Connecticut
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.