Nebraska · Central Time
531 Area Code
Area code 531 is in Nebraska, serving eastern Nebraska, including Omaha, Lincoln and surrounding towns. It is in the Central Time zone. It shares its territory with overlay code 402, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 531 area code?
531 is a Nebraska area code covering eastern Nebraska, including Omaha, Lincoln and surrounding towns. In the wider directory it sits in the Midwest region.
Cities in the 531 area code
- Omaha
- Lincoln
- Bellevue
- Fremont
- Hastings
- Norfolk
- Columbus
- Papillion
- La Vista
- South Sioux City
- Beatrice
- York
- Blair
- Nebraska City
Counties served by 531
Douglas County, Lancaster County, Sarpy County, Dodge County, Adams County, Madison County, Platte County, Dakota County, Gage County and York County.
Time zone note: Central in the east (Omaha, Lincoln); the Panhandle is Mountain.
531 overlay codes and dialing
The 531 territory is covered by an overlay of 2 area codes: 402, 531. All of them serve the same geographic area, and the original code is 402. 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 531 area code
531 went into service on March 26, 2011 as an overlay of 402, relieving number exhaustion in the Omaha 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 531 a scam or spam risk?
531 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 531 number on your screen is no guarantee the caller is in Omaha, NE or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in Nebraska, compare codes across the Midwest region, or view all Central Time codes. You can also browse the 5XX 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
531 area code FAQ
Where is the 531 area code?
The 531 area code is in Nebraska, covering eastern Nebraska, including Omaha, Lincoln and surrounding towns, in the Midwest region.
What cities are in the 531 area code?
Cities in the 531 area code include Omaha, Lincoln, Bellevue, Fremont, Hastings, Norfolk, Columbus, Papillion, La Vista and South Sioux City.
What time zone is 531 in?
531 is in the Central Time zone. Central in the east (Omaha, Lincoln); the Panhandle is Mountain.
What is the overlay for the 531 area code?
531 shares its territory with 402. Both codes (402, 531) serve the same area, so 10-digit dialing is required for every call.
When did the 531 area code start?
531 went into service on March 26, 2011 as an overlay of 402.
Do I have to dial 10 digits for 531?
Yes. Because 531 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 531 a toll-free or premium code?
No. 531 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.