NANP area code
475
UTC−5, UTC−4 during daylight saving
- State
- Connecticut
- Primary city
- Bridgeport
- Time zone
- Eastern
- In service
- 2009
- Overlay
- 203
Area Code 475 — Bridgeport, Connecticut
The code reaches 67 communities and 6 planning regions across Connecticut.
Was this call legitimate?
The area code itself carries no risk signal. 475 is assigned to Bridgeport, Connecticut, so a call from it is consistent with a real caller in that area — but the digits alone prove nothing, because they can be forged.
Caller ID is set by whoever places the call, not verified by the network. That is why neighbour spoofing works: an operation anywhere in the world can display a number that matches the area code — and often the first three digits after it — of the person being called, so the call looks local. Every community in the 475 territory is a plausible-looking origin for a forged 475 number, which is why one can be made to look like a neighbour to so many people. The same applies to its overlay code 203, which serves the same ground.
If you did not recognise the call: let it go to voicemail — a legitimate caller with real business will leave one. Do not return the call using the number shown; look the organisation up independently and call the number you found. Never confirm personal details, card numbers, or one-time codes to someone who called you, however plausible the number looked.
Codes.zone publishes no complaint counts, risk scores, or caller identities. We hold no data on individual numbers and will not estimate what we cannot source.
Local time and when to call back
Time there now
—
Eastern · UTC−5, UTC−4 during daylight saving
Reasonable callback window
8:00 AM – 9:00 PM
local time in Eastern
Federal rules bar telemarketing calls to a residence outside 8:00 AM–9:00 PM in the called party's own time zone. It is a sensible bound for a personal callback too — and a caller who rang you well outside it was not observing it.
Overlay codes and ten-digit dialling
475 does not have its territory to itself. 203 covers the same ground, serving Bridgeport and the rest of the 475 territory. An overlay is what a regulator adds when a region runs out of assignable numbers: rather than splitting the area and forcing half the residents to change their number, a second code is laid over the top and new numbers are issued from it.
The practical consequence: two neighbours on the same street can hold numbers in different area codes, so the code tells you nothing about which part of town a caller is in — and local calls must be dialled as all ten digits, because seven is no longer unambiguous.
- 475 203
Cities served
| City | ZIP codes | Planning region |
|---|---|---|
| New Haven | 28 | South Central Connecticut Planning Region |
| Stamford | 17 | Western Connecticut Planning Region |
| Waterbury | 16 | Naugatuck Valley Planning Region |
| Bridgeport | 10 | Greater Bridgeport Planning Region |
| Norwalk | 10 | Western Connecticut Planning Region |
| Danbury | 6 | Western Connecticut Planning Region |
| Wallingford | 4 | South Central Connecticut Planning Region |
| Westport | 4 | Western Connecticut Planning Region |
| Cheshire | 3 | Naugatuck Valley Planning Region |
| Fairfield | 3 | Greater Bridgeport Planning Region |
| Greenwich | 3 | Western Connecticut Planning Region |
| Hamden | 3 | South Central Connecticut Planning Region |
| Meriden | 2 | South Central Connecticut Planning Region |
| Middletown | 2 | Lower Connecticut River Valley Planning Region |
| Milford | 2 | South Central Connecticut Planning Region |
| Ridgefield | 2 | Western Connecticut Planning Region |
| Stratford | 2 | Greater Bridgeport Planning Region |
| Ansonia | 1 | Naugatuck Valley Planning Region |
| Beacon Falls | 1 | Naugatuck Valley Planning Region |
| Bethany | 1 | South Central Connecticut Planning Region |
47 further communities not listed. All Connecticut area codes →
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every community matched to 475. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot), GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . Coordinates are place reference points, not boundaries.
Planning regions
Prefixes inside 475
We do not publish the NXX prefixes inside 475. The assignment of prefixes to rate centres comes from LERG routing data, which is proprietary, and we will not estimate it from postal data — ZIP codes and telephone prefixes do not map onto each other. Awaiting a clean-rights NPA-NXX source.
Why this code exists
475 is the newer code here, added in 2009 over 203 (1947). The older code had run out of exchanges to assign, and an overlay avoids the alternative — splitting the region and forcing half its residents to renumber. New lines have been issued from 475 since.