--- title: "Area code 405: Oklahoma, United States" url: "https://lookvalid.com/area-code/405.md" canonical_url: "https://lookvalid.com/area-code/405" last_updated: "2026-10-23" type: "reference" summary: "Area code 405 serves Oklahoma, United States. Number formats, numbering rules, a live phone validator and the other codes in Oklahoma." --- # Area code 405: Oklahoma, United States Area code 405 serves Oklahoma, United States. Number formats, numbering rules, a live phone validator and the other codes in Oklahoma. NANPA lists 782 central office codes (prefixes) in use in area code 405, held by 43 holders across 93 rate centers. The largest rate center is OKLA CITY, with 336 prefixes (43%). Southwestern Bell holds the most prefixes, 236 (30%). 72% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 3,720 complaints on file for 3,103 numbers in 405, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 1947-01-01 - Time zone: Central (C) - Assigned overlays: 572 (2021-05-24) - Prefixes in use: 782 - Pooled prefixes: 562 (72%) - Rate centers: 93 - Companies holding prefixes: 43 - Assignment dates on file: 2001-01-03 to 2025-12-22 (285 prefixes) - ZIP codes in its places: 101 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | OKLA CITY | 336 | 43% | | BRITTON | 36 | 5% | | BETHANY | 31 | 4% | | EDMOND | 30 | 4% | | STILLWATER | 26 | 3% | | MOORE | 25 | 3% | | NORMAN | 24 | 3% | | SHAWNEE | 17 | 2% | | 85 other rate centers | 257 | 33% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | Southwestern Bell | 236 | 30% | | New Cingular Wireless PCS | 102 | 13% | | T-Mobile USA | 87 | 11% | | Onvoy | 57 | 7% | | Verizon Wireless | 55 | 7% | | Comcast IP Phone | 41 | 5% | | 37 other carriers | 204 | 26% | 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 405 went into service. - 1997-11-01: Area code 580 went into service and names 405 as its parent. - 2021-05-24: Area code 572 went into service as an overlay in the same area as 405. ## Nearest area codes The area codes closest to 405, measured between the centers of the ZIP code places they serve, are 580 (about 41 miles), 539 (about 104 miles), 918 (about 105 miles), 940 (about 143 miles) and 316 (about 161 miles). ## ZIP codes 101 ZIP codes fall in places that have a rate center in this area code. The places with the most are Edmond, OK (6 ZIP codes), Norman, OK (6 ZIP codes) and Stillwater, OK (5 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 3,720 complaints for 3,103 numbers. Numbers whose latest complaint falls in each year: - 2023: 154 - 2024: 242 - 2025: 174 ## Questions ### Where is area code 405? NANPA assigns area code 405 to Oklahoma, United States. ### In which state does area code 405 sit? Oklahoma. 405 is one of 5 area codes the NANPA table assigns to the state. ### Which places does area code 405 cover? The places with the most ZIP codes among the rate centers in 405 are Edmond, OK, Norman, OK and Stillwater, OK. The rate center list on this page shows all of them. ### Who owns area code 405? NANPA assigns area codes. Within 405, Southwestern Bell holds the most prefixes, 236 prefixes or 30%. ### Which time zone does 405 use? The NANPA NPA report lists the time zone for 405 as Central (C). ### What year did 405 enter service? The NANPA NPA report gives an in-service date of 1947-01-01, so 405 has been in use since 1947. ### Does area code 405 have an overlay? Yes. 572 (in service 2021-05-24) shares the same area with 405, so numbers from all of them are local to each other. ### Which area codes are nearest to 405? The area codes closest to 405, measured between the centers of the ZIP code places they serve, are 580 (about 41 miles), 539 (about 104 miles), 918 (about 105 miles), 940 (about 143 miles) and 316 (about 161 miles). ### How many prefixes does area code 405 have? NANPA's report dated 2026-10-17 lists 782 prefixes in service in 405, spread over 93 rate centers and 43 holders. ### Are there complaints about 405 numbers? The FCC data on file has 3,720 complaints for 3,103 numbers in 405. 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).