Skip to content
Country Dialing CodesA clearer way to call the world
AboutContact
Español — prefijos-telefonicos.comFrançais — indicatifs-telephoniques.net
US area code · Connecticut

203 area code

Where the 203 area code is, its overlay and how to dial a +1 203 number from anywhere.

CoversBridgeport, ConnecticutTime zoneEastern (ET)TypeOverlay
Quick answer

The 203 area code is in Bridgeport, Connecticut, United States (Eastern (ET)). To call from abroad: +1 203 555-0123. It is an overlay, so all 10 digits are dialled.

StateConnecticut
Main areaBridgeport
Time zoneEastern (ET)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1947

The 203 area code is a geographic North American Numbering Plan (NANP) code covering Bridgeport, Connecticut. It has been in service since 01-Jan-1947 and sits in the Eastern (ET) time zone.

Overlay 203 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

203475

How to dial a 203 number

From abroad+1 203 555-0123
Within the US / Canada1 203 555-0123
Locally (same area)203 555-0123

Cities in the 203 area code

A 203 number is usually in one of these places in Connecticut — 2 counties.

Bridgeport FairfieldDanbury FairfieldEast Haven New HavenMeriden New HavenMilford New HavenNaugatuck New HavenNew Haven New HavenNorth Haven New HavenNorwalk FairfieldShelton FairfieldStamford FairfieldStratford FairfieldTrumbull FairfieldWaterbury New HavenWest Haven New HavenWestport Fairfield

Other Connecticut area codes

475860959

Frequently asked questions

Where is the 203 area code?

The 203 area code is in Bridgeport, Connecticut, United States (Eastern (ET)).

Is 203 an overlay area code?

Yes. 203 overlays the same region as 475, so callers dial all 10 digits.

Do I have to dial 10 digits for 203?

Yes — dial the area code plus the seven-digit number.

How do I call a 203 number from another country?

Dial your exit code (or +), then 1, then 203, then the number: +1 203 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 203 number does not pinpoint a street or ZIP code.

Number holders in area code 203

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 203, shared by 24 companies. The largest holders:

CompanyPrefixesShare
Southern New England Telco Dba Frontier Comm Of Ct33842%
Cellco Partnership Dba Verizon Wireless618%
New Cingular Wireless PCS, LLC527%
Omnipoint Communications, Inc.476%
Level 3 Communications, LLC415%
Paetec Itel, LLC405%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 203 numbers

Reports to the FTC, last 30 days
369
Recorded messages or robocalls
54%
Rank among area codes
#261 of 670
Most reported subjects
Other (155)
Dropped call or no message (54)
Calls pretending to be government, businesses, or family and friends (41)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 203 — cities & rate centres

Explore by continent