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United States

621 area code

The 621 area code serves the Houston area of Texas in the United States. To call from abroad, start with +1 621.

The +1 country code is shared by the United States, Canada and other destinations.

Dial +1 621, then the seven-digit local number.

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United States starting rates

Landline
From $0.02/min
Mobile
From $0.02/min

These are starting rates for the US. Your full number and selected caller ID determine the final rate, which you see before calling.

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Where is the 621 area code?

The 621 area code serves the Houston area of Texas.

Its coverage does not follow exact city boundaries, and the person using a number may be elsewhere.

621 coverage area

Approximate coverage
621 area-code coverage in United States, highlighted in orange. Boundaries are simplified.HoustonBeaumontTexas CityPort ArthurConroe
United StatesExplore map
Map details and sources

Orange shows the approximate area served by 621. Boundaries are simplified for this map, using a historical telephone-area dataset with reviewed updates for shared and combined areas. It is a coverage guide, not an exact exchange-boundary survey. An area code does not show a caller’s current location.

Telephone boundaries: HSIP / UCLA dataset (public domain). Map geography: Natural Earth (public domain). Nearby city coordinates: Wikidata (CC0).

Coverage references: Numbering authority.

Got a call from 621?

621 is a geographic area code, but it does not identify who is calling or prove where they are. People can keep numbers after moving or use internet calling.

Caller ID can be faked. If a caller claims to be a company you know, check independently using a number from its official website.

How to dial 621 from abroad

From abroad

+1 621 XXX XXXX

Within the US

(621) XXX-XXXX

Replace each X with a digit from the number you want to call.

Dial +1, then 621, then the seven-digit local number. Within the US or Canada, keep the area code; your phone service may also require the leading 1.

In Talkala, enter the full number starting with +. If your phone service does not accept +, use its international access prefix instead. This varies by country and carrier.

Common questions

Questions about 621

Is 621 a US or Canadian area code?

621 belongs to United States, in Texas. Both countries use +1, so the three-digit area code helps identify the destination.

Why was 621 added?

621 adds more phone numbers in the area already served by 346 and its existing overlay codes. Existing numbers keep their area code.

Is 621 a country code?

621 is an area code used in the US. The country calling code is +1.

The +1 calling code is shared by the United States, Canada and other countries and territories. Keep the recipient's area code when dialing.

Can I call numbers with area code 621 from my browser?

Yes. Enter the full number in Talkala, check the rate, then sign in to call.

The person answering uses their usual phone and does not need Talkala. Even if the format is correct, the number may no longer be in use or reachable.

Sources and limits

Numbering details checked Oct 16, 2026. Coverage is a general guide and may not list every place served.

Prices come from Talkala's published rates, updated May 12, 2026, using the default United States caller ID. The exact rate depends on your selected caller ID and full number.