621 Area Code
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Area code 621 covers the same geographic area as area codes 713, 281, 832, and 346, encompassing Houston and its surrounding areas.
Area code 621 is part of an overlay complex with area codes 713, 281, 832, and 346. Area code 713 was established in 1947, area code 281 was created in 1996, area code 832 was added in 1999, area code 346 was added in 2014 and area code 621 was implemented in 2025. Ten-digit dialing is mandatory for all calls in this region.
Area code 621 is a general purpose code which was placed in service on January 23, 2025.
Our Texas phone number lookup service will analyze the three-digit prefix of any 621 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Texas geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
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Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
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