Area Code 621

Area code 621 is one of the newest NANP area codes

Area code 621 is one of the most recently added codes in the North American Numbering Plan, in service since January 23, 2025. It is an overlay that shares its territory with 281, 346, 713, 832, adding fresh numbers as those codes fill up. Existing numbers in the area keep their codes; only new phone lines may be issued a 621 number.

Because 621 is new and unfamiliar, some people are wary when it appears on caller ID and search for “who called me from 621?” An area code only shows where a number is registered, and any number can be spoofed — so a 621 call is not suspicious on its own. Judge each call by what it asks for, not the code. Is a call from 621 a scam?

Frequently asked questions

Where is area code 621?

Area code 621 covers Pasadena and nearby cities including Pearland, League City, Sugar Land in Texas, in the Central Time.

What cities use area code 621?

Area code 621 serves Pasadena, Pearland, League City, Sugar Land, Baytown, and 13 other communities in Texas.

What time zone is area code 621 in?

Area code 621 is in the Central Time (America/Chicago).

How do you dial a 621 number?

Dial all 10 digits: 621 followed by the 7-digit local number. From abroad, dial +1 621 and the local number.

Is a call from area code 621 a scam?

A 621 number is geographically tied to Texas, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Is 621 a country code?

No. 621 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 621 number written for international dialing looks like +1 621 followed by the 7-digit local number.