--- title: "Area code 620: Kansas, United States" url: "https://lookvalid.com/area-code/620.md" canonical_url: "https://lookvalid.com/area-code/620" last_updated: "2026-10-23" type: "reference" summary: "Area code 620 serves Kansas, United States. Number formats, numbering rules, a live phone validator and the other codes in Kansas." --- # Area code 620: Kansas, United States Area code 620 serves Kansas, United States. Number formats, numbering rules, a live phone validator and the other codes in Kansas. NANPA lists 705 central office codes (prefixes) in use in area code 620, held by 70 holders across 257 rate centers. Southwestern Bell holds the most prefixes, 149 (21%). 76% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 1,415 complaints on file for 927 numbers in 620, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2001-02-03 - Time zone: CM - Prefixes in use: 705 - Pooled prefixes: 534 (76%) - Rate centers: 257 - Companies holding prefixes: 70 - Assignment dates on file: 2001-01-29 to 2026-01-07 (311 prefixes) - ZIP codes in its places: 215 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | HUTCHINSON | 28 | 4% | | GARDENCITY | 18 | 3% | | DODGE CITY | 16 | 2% | | EMPORIA | 15 | 2% | | PITTSBURG | 15 | 2% | | GREAT BEND | 14 | 2% | | LIBERAL | 13 | 2% | | COFFEYVL | 12 | 2% | | 249 other rate centers | 574 | 81% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | Southwestern Bell | 149 | 21% | | Centurylink | 60 | 9% | | Verizon Wireless | 59 | 8% | | Level 3 Communications | 41 | 6% | | New Cingular Wireless PCS | 32 | 5% | | Onvoy | 30 | 4% | | 64 other carriers | 334 | 47% | 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 316, named as the parent of 620 in the NANPA report, was in service. - 2001-02-03: Area code 620 went into service. ## Nearest area codes The area codes closest to 620, measured between the centers of the ZIP code places they serve, are 316 (about 20 miles), 785 (about 105 miles), 572 (about 159 miles), 405 (about 161 miles) and 539 (about 162 miles). ## ZIP codes 215 ZIP codes fall in places that have a rate center in this area code. The places with the most are Hutchinson, KS (3 ZIP codes), Liberal, KS (2 ZIP codes) and Albert, KS (1 ZIP code). 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 1,415 complaints for 927 numbers. Numbers whose latest complaint falls in each year: - 2023: 85 - 2024: 84 - 2025: 42 ## Questions ### Where is area code 620? NANPA assigns area code 620 to Kansas, United States. ### In which state does area code 620 sit? Kansas. 620 is one of 4 area codes the NANPA table assigns to the state. ### Which places does area code 620 cover? The places with the most ZIP codes among the rate centers in 620 are Hutchinson, KS, Liberal, KS and Albert, KS. The rate center list on this page shows all of them. ### Who owns area code 620? NANPA assigns area codes. Within 620, Southwestern Bell holds the most prefixes, 149 prefixes or 21%. ### Which time zone does 620 use? The NANPA NPA report lists the time zone for 620 as CM. ### What year did 620 enter service? The NANPA NPA report gives an in-service date of 2001-02-03, so 620 has been in use since 2001. ### Does area code 620 have an overlay? The NANPA NPA report lists no other area code in an overlay with 620. ### Which area codes are nearest to 620? The area codes closest to 620, measured between the centers of the ZIP code places they serve, are 316 (about 20 miles), 785 (about 105 miles), 572 (about 159 miles), 405 (about 161 miles) and 539 (about 162 miles). ### How many prefixes does area code 620 have? NANPA's report dated 2026-10-17 lists 705 prefixes in service in 620, spread over 257 rate centers and 70 holders. ### Are there complaints about 620 numbers? The FCC data on file has 1,415 complaints for 927 numbers in 620. 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).