--- title: "Area code 708: Illinois, United States" url: "https://lookvalid.com/area-code/708.md" canonical_url: "https://lookvalid.com/area-code/708" last_updated: "2026-10-23" type: "reference" summary: "Area code 708 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois." --- # Area code 708: Illinois, United States Area code 708 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois. NANPA lists 783 central office codes (prefixes) in use in area code 708, held by 26 holders across 37 rate centers. Illinois Bell Tel holds the most prefixes, 178 (23%). 70% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 2,889 complaints on file for 2,278 numbers in 708, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 1989-11-11 - Time zone: Central (C) - Assigned overlays: 464 (2022-01-21) - Prefixes in use: 783 - Pooled prefixes: 549 (70%) - Rate centers: 37 - Companies holding prefixes: 26 - Assignment dates on file: 2001-02-12 to 2025-10-02 (248 prefixes) - ZIP codes in its places: 34 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | LA GRANGE | 129 | 16% | | CHICAGOHTS | 64 | 8% | | BLUEISLAND | 43 | 5% | | ROSELLE | 41 | 5% | | MAYWOOD | 35 | 4% | | OAK LAWN | 31 | 4% | | NORTHBROOK | 30 | 4% | | ORLAND | 30 | 4% | | 29 other rate centers | 380 | 49% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | Illinois Bell Tel | 178 | 23% | | T-Mobile USA | 122 | 16% | | New Cingular Wireless PCS | 107 | 14% | | Level 3 Communications | 65 | 8% | | Mcimetro Access Transmission Services | 50 | 6% | | Verizon Wireless | 49 | 6% | | 20 other carriers | 212 | 27% | 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 312, named as the parent of 708 in the NANPA report, was in service. - 1989-11-11: Area code 708 went into service. - 1996-01-20: Area code 847 went into service and names 708 as its parent. - 1996-08-03: Area code 630 went into service and names 708 as its parent. - 2022-01-21: Area code 464 went into service as an overlay in the same area as 708. ## Nearest area codes The area codes closest to 708, measured between the centers of the ZIP code places they serve, are 312 (about 17 miles), 630 (about 22 miles), 331 (about 23 miles), 847 (about 28 miles) and 224 (about 29 miles). ## ZIP codes 34 ZIP codes fall in places that have a rate center in this area code. The places with the most are Oak Park, IL (4 ZIP codes), Hinsdale, IL (2 ZIP codes) and Northbrook, IL (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 2,889 complaints for 2,278 numbers. Numbers whose latest complaint falls in each year: - 2023: 168 - 2024: 135 - 2025: 143 ## Questions ### Where is area code 708? NANPA assigns area code 708 to Illinois, United States. ### In which state does area code 708 sit? Illinois. 708 is one of 17 area codes the NANPA table assigns to the state. ### Which places does area code 708 cover? The places with the most ZIP codes among the rate centers in 708 are Oak Park, IL, Hinsdale, IL and Northbrook, IL. The rate center list on this page shows all of them. ### Who owns area code 708? NANPA assigns area codes. Within 708, Illinois Bell Tel holds the most prefixes, 178 prefixes or 23%. ### Which time zone does 708 use? The NANPA NPA report lists the time zone for 708 as Central (C). ### What year did 708 enter service? The NANPA NPA report gives an in-service date of 1989-11-11, so 708 has been in use since 1989. ### Does area code 708 have an overlay? Yes. 464 (in service 2022-01-21) shares the same area with 708, so numbers from all of them are local to each other. ### Which area codes are nearest to 708? The area codes closest to 708, measured between the centers of the ZIP code places they serve, are 312 (about 17 miles), 630 (about 22 miles), 331 (about 23 miles), 847 (about 28 miles) and 224 (about 29 miles). ### How many prefixes does area code 708 have? NANPA's report dated 2026-10-17 lists 783 prefixes in service in 708, spread over 37 rate centers and 26 holders. ### Are there complaints about 708 numbers? The FCC data on file has 2,889 complaints for 2,278 numbers in 708. 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).