Area code 641 covers Mason City and surrounding areas in Iowa. It was activated in 2000 as an overlay of area code 515. For the full picture, see all Iowa area codes.
| State | Iowa |
|---|---|
| Primary city | Mason City |
| Cities also served | Mason City, Marshalltown, Ottumwa, Newton, Pella, Grinnell, Oskaloosa, Clear Lake |
| Time zone | Central (UTC-6 / UTC-5 DST) |
| Year established | July 9, 2000 |
| Original 1947 NPA? | No |
| Parent code | 515 |
| Overlay codes | None |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
Cities Served by Area Code 641
Area code 641 serves Central and south-central Iowa, spanning more than 40 counties from the Minnesota border south to the Missouri border, including the following cities and communities:
- Mason City
- Marshalltown
- Ottumwa
- Newton
- Pella
- Grinnell
- Oskaloosa
- Clear Lake
Nearby area codes covering the same broader region include: 515, 319, 563, 712.
How to Get a 641 Phone Number
There are three ways to get a phone number with the 641 area code, each suited to a different need:
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Browse 641 Numbers →- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 641 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 641 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 641 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 641 number. If you already have a 641 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 Iowa sometimes can’t accept inbound ports of 641 numbers due to 911 routing rules.
Looking for a 641 number? 212areacode.com offers premium 641 numbers for Mason City, Iowa — 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 641 numbers →
Frequently Asked Questions
Is the 641 area code still in use?
Yes. 641 is actively assigned to new phone lines in Central and south-central Iowa, spanning more than 40 counties from the Minnesota border south to the Missouri border.
What is the parent area code of 641?
Area code 641 is an overlay of 515. Both codes serve the same region of Iowa.
Can I get a 641 number if I don't live in Iowa?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 641 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 641 a scam area code?
No. 641 is a legitimate, active area code for Central and south-central Iowa, spanning more than 40 counties from the Minnesota border south to the Missouri border. Like any area code, scammers occasionally spoof 641 caller IDs, but the code itself is heavily used by real Iowa businesses, government offices, and residents.
What cities are in the 641 area code?
The 641 area code serves Mason City, Marshalltown, Ottumwa, Newton, Pella, Grinnell, Oskaloosa, Clear Lake, and more than 200 other communities across central and south-central Iowa.
When did area code 641 go into service?
Area code 641 entered service on July 9, 2000, when it was split from area code 515. It was the first area code split in Iowa since the North American Numbering Plan was created in 1947.
Does the 641 area code have an overlay?
No. As of 2026, area code 641 has no overlay code. It is the sole area code for its geographic territory, and seven-digit local dialing remains permitted within the NPA.
What time zone is the 641 area code in?
Area code 641 is in the Central Time Zone — Central Standard Time (UTC-6) in winter and Central Daylight Time (UTC-5) during daylight saving time.
Related Reading
- How Are Area Codes Assigned?
- Why the Right Area Code Matters
- When Did We Start Using Area Codes?
- How Many Area Codes Are In the US?
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