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US area code · Texas

737 area code

Where the 737 area code is, its overlay and how to dial a +1 737 number from anywhere.

CoversAustin, TexasTime zoneCentral (CT)TypeOverlay
Quick answer

The 737 area code is in Austin, Texas, United States (Central (CT)). To call from abroad: +1 737 555-0123. It is an overlay, so all 10 digits are dialled.

StateTexas
Main areaAustin
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since25-Apr-2000

The 737 area code is a geographic North American Numbering Plan (NANP) code covering Austin, Texas. It has been in service since 25-Apr-2000 and sits in the Central (CT) time zone.

Overlay 737 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.

737512

How to dial a 737 number

From abroad+1 737 555-0123
Within the US / Canada1 737 555-0123
Locally (same area)737 555-0123

Cities in the 737 area code

A 737 number is usually in one of these places in Texas — 3 counties.

Austin Hays;Travis;WilliamsonCedar Park WilliamsonGeorgetown WilliamsonRound Rock WilliamsonSan Marcos Hays

Other Texas area codes

210214254281325346361409430432469512621682713726

Frequently asked questions

Where is the 737 area code?

The 737 area code is in Austin, Texas, United States (Central (CT)).

Is 737 an overlay area code?

Yes. 737 overlays the same region as 512, so callers dial all 10 digits.

Do I have to dial 10 digits for 737?

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

How do I call a 737 number from another country?

Dial your exit code (or +), then 1, then 737, then the number: +1 737 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 737 number does not pinpoint a street or ZIP code.

Number holders in area code 737

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 345 prefixes are in use in 737, shared by 47 companies. The largest holders:

CompanyPrefixesShare
Onvoy, LLC8123%
T-Mobile USA, Inc.3310%
New Cingular Wireless PCS, LLC298%
Cellco Partnership Dba Verizon Wireless288%
Fractel, LLC268%
Bandwidth.Com CLEC, LLC216%

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

Complaints about 737 numbers

Reports to the FTC, last 30 days
287
Recorded messages or robocalls
62%
Rank among area codes
#294 of 670
Most reported subjects
Other (118)
Reducing your debt (credit cards, mortgage, student loans) (52)
Dropped call or no message (34)

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 737 — cities & rate centres

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