Minnesota · Central Time
924 Area Code
Area code 924 is in Minnesota, serving southern Minnesota including Rochester, Mankato, Winona and Austin. It is in the Central Time zone. It shares its territory with overlay code 507, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 924 area code?
924 is a Minnesota area code covering southern Minnesota including Rochester, Mankato, Winona and Austin. In the wider directory it sits in the Midwest region.
Cities in the 924 area code
- Rochester
- Mankato
- Winona
- Austin
- Owatonna
- Faribault
- Northfield
- Albert Lea
- New Ulm
- Marshall
- Worthington
- Fairmont
- St. Peter
Counties served by 924
Olmsted County, Blue Earth County, Winona County, Mower County, Steele County, Rice County, Freeborn County, Nicollet County, Brown County and Lyon County.
924 overlay codes and dialing
The 924 territory is covered by an overlay of 2 area codes: 507, 924. All of them serve the same geographic area, and the original code is 507. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 924 area code
924 went into service on August 30, 2024 as an overlay of 507, relieving number exhaustion in the Rochester area. Rather than splitting the region, the overlay lets existing customers keep their numbers while new lines draw from the added code. Learn more in our overlay guide.
Is 924 a scam or spam risk?
924 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 924 number on your screen is no guarantee the caller is in Rochester, MN or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Minnesota area codes
Explore more
See every code in Minnesota, compare codes across the Midwest region, or view all Central Time codes. You can also browse the 9XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
924 area code FAQ
Where is the 924 area code?
The 924 area code is in Minnesota, covering southern Minnesota including Rochester, Mankato, Winona and Austin, in the Midwest region.
What cities are in the 924 area code?
Cities in the 924 area code include Rochester, Mankato, Winona, Austin, Owatonna, Faribault, Northfield, Albert Lea, New Ulm and Marshall.
What time zone is 924 in?
924 is in the Central Time zone.
What is the overlay for the 924 area code?
924 shares its territory with 507. Both codes (507, 924) serve the same area, so 10-digit dialing is required for every call.
When did the 924 area code start?
924 went into service on August 30, 2024 as an overlay of 507.
Do I have to dial 10 digits for 924?
Yes. Because 924 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 924 a toll-free or premium code?
No. 924 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.