Area code
464
464 is a United States area code. Under the North American Numbering Plan it belongs to Illinois, which has 17 area codes in total.
Validate a number in 464
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 464 at a glance
NANPA lists 105 central office codes (prefixes) in use in area code 464, held by 11 holders across 24 rate centers.
| Fact | Value |
|---|---|
| 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 in area code 464
| 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% |
Who holds the prefixes in 464
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.
| 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. Find which carrier a number is on, or browse the prefix holders.
History of area code 464
- 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.
Area codes nearest to 464
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
ZIP codes in area code 464
19 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Oak Lawn, IL | 2 |
| Tinley Park, IL | 2 |
| Beecher, IL | 1 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 464 numbers
138 FCC complaints are on file for 128 numbers in 464, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 13 |
| 2024 | 15 |
| 2025 | 58 |
Other area codes in Illinois
Illinois is one state with 17 area codes in the NANPA table. 464 is one of them.
Next to 464 in the numbering table
These are the codes just before and after 464 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 464 was first assigned in Illinois. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Illinois next to a 464 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 464
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.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.