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US area code · Connecticut

Area code 203

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.

Missed a call from +1 203?

In the 30 days to September 24, 2026, 369 unwanted calls showing a 203 number were reported to the US Federal Trade Commission, 54% of them recorded messages or robocalls. That puts 203 at #261 of 670 area codes reported.

Other155
Dropped call or no message54
Calls pretending to be government, businesses, or family and friends41
Reducing your debt (credit cards, mortgage, student loans)35
Before you call back
  • If you do not know anyone in Connecticut, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 203 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 203 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 203:

Southern New England Telco Dba Frontier Comm Of Ct 338Cellco Partnership Dba Verizon Wireless 61New Cingular Wireless PCS, LLC 52Omnipoint Communications, Inc. 47Level 3 Communications, LLC 41Paetec Itel, LLC 40

About 14.1% of the 800 prefixes in use belong to mobile carriers: a 203 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

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