Area codes · +1
Area code 475
Area code 475 is centred on New Haven, Connecticut. We hold 3,039 allocated blocks for it across 32 rate centres, split 44% mobile, 29% landline and 27% VoIP.
The other area codes laid over 475
Area code 475 does not have New Haven to itself. 1 other code — 203 — 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.
2035,514 blocks, 33 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 475 number and a 203 number from the same street can report different line types. Filtering New Haven by area code needs all 2 of them.
475 is not confined to New Haven itself: its blocks sit across 32 rate centres, named in the table below.
Connecticut is split across 4 area codes — 860, 203, 475, 959. By allocated blocks 475 is the third largest of them, holding 19% of the Connecticut total.
Where 475 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 475 |
|---|---|---|
| New Haven | 466 | 15% |
| Stamford | 297 | 10% |
| Bridgeport | 266 | 9% |
| Norwalk | 238 | 8% |
| Ansonidrby | 200 | 7% |
| Danbury | 192 | 6% |
| Waterbury | 191 | 6% |
| Huntington | 95 | 3% |
| Greenwich | 76 | 3% |
| Meriden | 75 | 2% |
| Trumbull | 75 | 2% |
| Wallingfd | 65 | 2% |
| Fairfield | 60 | 2% |
| Newtown | 60 | 2% |
| Milford | 57 | 2% |
| Branford | 52 | 2% |
| Darien | 50 | 2% |
| Cheshire | 46 | 2% |
| Naugatuck | 44 | 1% |
| Westport | 42 | 1% |
| Byram | 41 | 1% |
| New Canaan | 36 | 1% |
| Oldgrnwich | 36 | 1% |
| Woodbury | 36 | 1% |
8 further rate centres in 475 hold fewer blocks than these.
Carriers holding the most 475 blocks
Onvoy790 blocks
Verizon Wireless511 blocks
Bandwidth247 blocks
AT&T Wireless236 blocks
Omnipoint Communications, Inc.182 blocks
T-Mobile USA, Inc.173 blocks
The largest holder, Onvoy, has 26% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 475 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 475 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 475?
Area code 475 covers New Haven, Connecticut. It is not the only code there: 203 is an overlay on the same rate centres, so a New Haven, Connecticut number can start with any of them.
Is a 475 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 475 the split runs 44% mobile, 29% landline and 27% VoIP, so mobile is the most likely single answer.
Which carriers hold 475 numbers?
The largest holders are Onvoy, Verizon Wireless, Bandwidth. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 475 numbers are there?
The code holds 3,039 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 475 covers on the order of 3,039,000 possible numbers — most of which have never been issued to anyone.