--- title: "Area code 531: Nebraska, United States" url: "https://lookvalid.com/area-code/531.md" canonical_url: "https://lookvalid.com/area-code/531" last_updated: "2026-10-23" type: "reference" summary: "Area code 531 serves Nebraska, United States. Number formats, numbering rules, a live phone validator and the other codes in Nebraska." --- # Area code 531: Nebraska, United States Area code 531 serves Nebraska, United States. Number formats, numbering rules, a live phone validator and the other codes in Nebraska. NANPA lists 264 central office codes (prefixes) in use in area code 531, held by 39 holders across 104 rate centers. Onvoy holds the most prefixes, 64 (24%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 394 complaints on file for 340 numbers in 531, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2011-03-26 - Time zone: Central (C) - Assigned overlays: 402 (1947-01-01) - Prefixes in use: 264 - Pooled prefixes: 264 (100%) - Rate centers: 104 - Companies holding prefixes: 39 - Assignment dates on file: 2013-02-13 to 2026-07-02 (252 prefixes) - ZIP codes in its places: 173 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | OMAHA | 83 | 31% | | LINCOLN | 25 | 9% | | AURORA | 10 | 4% | | FREMONT | 5 | 2% | | COLUMBUS | 4 | 2% | | SOSIOUX CY | 4 | 2% | | AINSWORTH | 3 | 1% | | CRESTON | 3 | 1% | | 96 other rate centers | 127 | 48% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | Onvoy | 64 | 24% | | New Cingular Wireless PCS | 23 | 9% | | Verizon Wireless | 23 | 9% | | Teleport Communications America | 18 | 7% | | Aerial Communications | 17 | 6% | | United States Cellular | 15 | 6% | | 33 other carriers | 104 | 39% | A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. ## History - 1947-01-01: Area code 402, named as the parent of 531 in the NANPA report, was in service. - 2011-03-26: Area code 531 went into service. ## Nearest area codes The area codes closest to 531, measured between the centers of the ZIP code places they serve, are 712 (about 101 miles), 785 (about 135 miles), 515 (about 167 miles), 816 (about 177 miles) and 913 (about 182 miles). ## ZIP codes 173 ZIP codes fall in places that have a rate center in this area code. The places with the most are Omaha, NE (48 ZIP codes), Lincoln, NE (29 ZIP codes) and Blair, NE (2 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes. ## Complaints on file 394 complaints for 340 numbers. Numbers whose latest complaint falls in each year: - 2023: 35 - 2024: 43 - 2025: 33 ## Questions ### Where is area code 531? NANPA assigns area code 531 to Nebraska, United States. ### In which state does area code 531 sit? Nebraska. 531 is one of 3 area codes the NANPA table assigns to the state. ### Which places does area code 531 cover? The places with the most ZIP codes among the rate centers in 531 are Omaha, NE, Lincoln, NE and Blair, NE. The rate center list on this page shows all of them. ### Who owns area code 531? NANPA assigns area codes. Within 531, Onvoy holds the most prefixes, 64 prefixes or 24%. ### Which time zone does 531 use? The NANPA NPA report lists the time zone for 531 as Central (C). ### What year did 531 enter service? The NANPA NPA report gives an in-service date of 2011-03-26, so 531 has been in use since 2011. ### Does area code 531 have an overlay? Yes. 402 (in service 1947-01-01) shares the same area with 531, so numbers from all of them are local to each other. ### Which area codes are nearest to 531? The area codes closest to 531, measured between the centers of the ZIP code places they serve, are 712 (about 101 miles), 785 (about 135 miles), 515 (about 167 miles), 816 (about 177 miles) and 913 (about 182 miles). ### How many prefixes does area code 531 have? NANPA's report dated 2026-10-17 lists 264 prefixes in service in 531, spread over 104 rate centers and 39 holders. ### Are there complaints about 531 numbers? The FCC data on file has 394 complaints for 340 numbers in 531. They are unverified consumer reports. A number with no complaints on file is not proven safe. Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).