531 area code
Omaha area, Central Time.Area code 531 covers Omaha, Lincoln, Aurora and 278 more places in Nebraska, on Central Time. 402 covers the same area.
Right now in Omaha
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 531 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 531 has 281. Each one's share is how many 531 numbers start there. Its biggest metro area is Omaha, NE-IA.
- Omaha31%
- Lincoln9%
- Aurora4%
- Fremont2%
Also: Columbus, South Sioux City, Norfolk, Plattsmouth, Valentine, Wayne, West Point, Schuyler, Ainsworth, Creston, Howells, Oakland + 265 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 531 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 531 number to them, since you can't tell a work line from a personal cell.
What applies to 531Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
531 and 402
531 went into service on March 26, 2011. 531 and 402 cover the same area, so new numbers can get either code and neighbors can have different area codes. 531 holds 25% of the area's exchanges; 402 holds the most. Local calls take all 10 digits.
- 1947402 overlay
- 2011531 starts
Source: NANPA area code database
Other Nebraska area codes
All Nebraska area codes- Grand Island308
Calling a list of 531 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
531 area code FAQ
What area code is 531?
531 is a Nebraska area code for Omaha, Lincoln, Aurora, Fremont and 277 more places.
What time zone is the 531 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 402 the same as 531?
Same area, different code. 531 and 402 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 531 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 531 area code start?
On March 26, 2011.
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