Area code 621 covers Houston and surrounding areas in Texas. It was activated in 2025 as an overlay of area code 346. Today it shares its territory with overlay codes 281 and 346 and 713 and 832. For the full picture, see all Texas area codes.
| State | Texas |
|---|---|
| Primary city | Houston |
| Cities also served | Houston, Baytown, League City, Missouri City, Pasadena, Pearland, Sugar Land, The Woodlands |
| Time zone | Central (UTC-6 / UTC-5 DST) |
| Year established | January 23, 2025 |
| Original 1947 NPA? | No |
| Parent code | 346 |
| Overlay codes | 281, 346, 713, 832 |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
Cities Served by Area Code 621
Area code 621 serves Greater Houston metropolitan area and surrounding communities across Harris, Austin, Brazoria, Chambers, Fort Bend, Galveston, Liberty, Montgomery, San Jacinto, and Waller Counties, including the following cities and communities:
- Houston
- Baytown
- League City
- Missouri City
- Pasadena
- Pearland
- Sugar Land
- The Woodlands
Nearby area codes covering the same broader region include: 281, 346, 713, 832.
How to Get a 621 Phone Number
There are three ways to get a phone number with the 621 area code, each suited to a different need:
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Browse 621 Numbers →- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 621 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 621 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 621 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 621 number. If you already have a 621 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Texas sometimes can’t accept inbound ports of 621 numbers due to 911 routing rules.
Looking for a 621 number? 212areacode.com offers premium 621 numbers for Houston, Texas — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 621 numbers →
Frequently Asked Questions
Is the 621 area code still in use?
Yes. 621 is actively assigned to new phone lines in Greater Houston metropolitan area and surrounding communities across Harris, Austin, Brazoria, Chambers, Fort Bend, Galveston, Liberty, Montgomery, San Jacinto, and Waller Counties.
What is the difference between 621 and 281?
Today they share the same geographic territory in Texas. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.
What is the parent area code of 621?
Area code 621 is an overlay of 346. Both codes serve the same region of Texas.
Can I get a 621 number if I don't live in Texas?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 621 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 621 a scam area code?
No. 621 is a legitimate, active area code for Greater Houston metropolitan area and surrounding communities across Harris, Austin, Brazoria, Chambers, Fort Bend, Galveston, Liberty, Montgomery, San Jacinto, and Waller Counties. Like any area code, scammers occasionally spoof 621 caller IDs, but the code itself is heavily used by real Texas businesses, government offices, and residents.
