--- title: "Area code 464: Illinois, United States" url: "https://lookvalid.com/area-code/464.md" canonical_url: "https://lookvalid.com/area-code/464" last_updated: "2026-10-23" type: "reference" summary: "Area code 464 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois." --- # Area code 464: Illinois, United States Area code 464 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois. NANPA lists 105 central office codes (prefixes) in use in area code 464, held by 11 holders across 24 rate centers. New Cingular Wireless PCS holds the most prefixes, 52 (50%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 138 complaints on file for 128 numbers in 464, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2022-01-21 - Time zone: Central (C) - Assigned overlays: 708 (1989-11-11) - Prefixes in use: 105 - Pooled prefixes: 105 (100%) - Rate centers: 24 - Companies holding prefixes: 11 - Assignment dates on file: 2021-11-02 to 2026-03-19 (105 prefixes) - ZIP codes in its places: 19 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | FOREST | 19 | 18% | | OAK FOR SO | 19 | 18% | | LA GRANGE | 17 | 16% | | CICERO | 9 | 9% | | BLUEISLAND | 8 | 8% | | CHICAGOHTS | 6 | 6% | | HARVEY | 3 | 3% | | ORLAND | 3 | 3% | | 16 other rate centers | 21 | 20% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | New Cingular Wireless PCS | 52 | 50% | | Onvoy | 19 | 18% | | Fractel | 14 | 13% | | Ton80 Communications | 5 | 5% | | T-Mobile USA | 4 | 4% | | Verizon Wireless | 3 | 3% | | 5 other carriers | 8 | 8% | 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 - 1989-11-11: Area code 708, named as the parent of 464 in the NANPA report, was in service. - 2022-01-21: Area code 464 went into service. ## Nearest area codes The area codes closest to 464, measured between the centers of the ZIP code places they serve, are 312 (about 25 miles), 331 (about 27 miles), 630 (about 28 miles), 219 (about 34 miles) and 847 (about 35 miles). ## ZIP codes 19 ZIP codes fall in places that have a rate center in this area code. The places with the most are Oak Lawn, IL (2 ZIP codes), Tinley Park, IL (2 ZIP codes) and Beecher, IL (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 138 complaints for 128 numbers. Numbers whose latest complaint falls in each year: - 2023: 13 - 2024: 15 - 2025: 58 ## Questions ### Where is area code 464? NANPA assigns area code 464 to Illinois, United States. ### In which state does area code 464 sit? Illinois. 464 is one of 17 area codes the NANPA table assigns to the state. ### Which places does area code 464 cover? The places with the most ZIP codes among the rate centers in 464 are Oak Lawn, IL, Tinley Park, IL and Beecher, IL. The rate center list on this page shows all of them. ### Who owns area code 464? NANPA assigns area codes. Within 464, New Cingular Wireless PCS holds the most prefixes, 52 prefixes or 50%. ### Which time zone does 464 use? The NANPA NPA report lists the time zone for 464 as Central (C). ### What year did 464 enter service? The NANPA NPA report gives an in-service date of 2022-01-21, so 464 has been in use since 2022. ### Does area code 464 have an overlay? Yes. 708 (in service 1989-11-11) shares the same area with 464, so numbers from all of them are local to each other. ### Which area codes are nearest to 464? The area codes closest to 464, measured between the centers of the ZIP code places they serve, are 312 (about 25 miles), 331 (about 27 miles), 630 (about 28 miles), 219 (about 34 miles) and 847 (about 35 miles). ### How many prefixes does area code 464 have? NANPA's report dated 2026-10-17 lists 105 prefixes in service in 464, spread over 24 rate centers and 11 holders. ### Are there complaints about 464 numbers? The FCC data on file has 138 complaints for 128 numbers in 464. 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).