Area codes · +1
Area code 959
Area code 959 is centred on Hartford, Connecticut. We hold 1,588 allocated blocks for it across 52 rate centres, split 43% mobile, 27% landline and 30% VoIP.
The other area codes laid over 959
Area code 959 does not have Hartford to itself. 1 other code — 860 — serves the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
8605,984 blocks, 58 rate centres, mostly mobile
Each holds its own blocks and its own carrier mix, so a 959 number and a 860 number from the same street can report different line types. Filtering Hartford by area code needs all 2 of them.
959 is not confined to Hartford itself: its blocks sit across 52 rate centres, named in the table below.
Connecticut is split across 4 area codes — 860, 203, 475, 959. By allocated blocks 959 is the 4th largest of them, holding 10% of the Connecticut total.
Where 959 numbers are concentrated
Rate-centre names are reproduced as NANPA records them. The agency truncates them to ten characters, so longer names appear shortened elsewhere on this site.
| Rate centre | Blocks | Share of 959 |
|---|---|---|
| Hartford | 407 | 26% |
| Newbritain | 82 | 5% |
| New London | 69 | 4% |
| Willimntic | 64 | 4% |
| Norwich | 59 | 4% |
| Torrington | 59 | 4% |
| Deep River | 41 | 3% |
| Bristol | 40 | 3% |
| Glastonby | 38 | 2% |
| Southingtn | 37 | 2% |
| Essex | 30 | 2% |
| Farmington | 30 | 2% |
| Enfield | 28 | 2% |
| Plainfield | 27 | 2% |
| Clinton | 26 | 2% |
| Middletown | 25 | 2% |
| Colchester | 22 | 1% |
| Storrs | 22 | 1% |
| Watertown | 22 | 1% |
| Coventry | 21 | 1% |
| Danielson | 20 | 1% |
| Old Saybrk | 20 | 1% |
| Washington | 18 | 1% |
| Winsted | 18 | 1% |
28 further rate centres in 959 hold fewer blocks than these.
Carriers holding the most 959 blocks
Onvoy467 blocks
Verizon Wireless228 blocks
Onvoy Spectrum142 blocks
T-Mobile USA, Inc.85 blocks
Omnipoint Communications, Inc.78 blocks
AT&T Wireless76 blocks
The largest holder, Onvoy, has 29% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 959 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 959 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 959?
Area code 959 covers Hartford, Connecticut. It is not the only code there: 860 is an overlay on the same rate centres, so a Hartford, Connecticut number can start with any of them.
Is a 959 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 959 the split runs 43% mobile, 27% landline and 30% VoIP, so mobile is the most likely single answer.
Which carriers hold 959 numbers?
The largest holders are Onvoy, Verizon Wireless, Onvoy Spectrum. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 959 numbers are there?
The code holds 1,588 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 959 covers on the order of 1,588,000 possible numbers — most of which have never been issued to anyone.