621 area code
Houston area, Central Time.Area code 621 covers Houston, Bammel, Spring and 42 more places in Texas, on Central Time. 281, 346, 713 and 832 cover the same area.
Right now in Houston
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM (Texas law)
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Where 621 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 621 covers 45, but it's new and has barely been issued yet, so these are ranked by the numbers its overlay already holds. Its biggest metro area is Houston-Pasadena-The Woodlands, TX.
Houston, Houston suburbs, Bammel, Spring, Langham Creek, Sugar Land, Richmond-Rosenberg, Baytown, Cypress, Humble, Barker, Tomball + 33 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 621 number?
Sales calls to homes and cell phones have legal hours, set by Texas law. Hold every 621 number to them, since you can't tell a work line from a personal cell.
What applies to 621Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- Texas lawMon to Sat, 9 AM to 9 PM · Sun, noon to 9 PMCalls to residences.Tex. Bus. & Com. Code 301.051(b)(2) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
621 and 281, 346, 713 and 832
621 went into service on January 23, 2025. 621, 281, 346, 713 and 832 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 621 holds 0% of the area's exchanges; 281 holds the most. Local calls take all 10 digits.
- 1947713 overlay
- 1996281 overlay
- 1999832 overlay
- 2014346 overlay
- 2025621 starts
Source: NANPA area code database
Calling a list of 621 numbers?
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621 area code FAQ
What area code is 621?
621 is a Texas area code for Houston, Bammel, Spring, Langham Creek and 41 more places.
What time zone is the 621 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 281 the same as 621?
Same area, different code. 621, 281, 346, 713 and 832 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 621 numbers?
Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM, local time, under Texas law.
When did the 621 area code start?
On January 23, 2025.
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