Area code
918
918 is a United States area code. Under the North American Numbering Plan it belongs to Oklahoma, which has 5 area codes in total.
Validate a number in 918
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 918 at a glance
NANPA lists 782 central office codes (prefixes) in use in area code 918, held by 55 holders across 181 rate centers.
| Fact | Value |
|---|---|
| In service since | 1953-01-01 |
| Time zone | Central (C) |
| Assigned overlays | 539 (2011-04-01) |
| Prefixes in use | 782 |
| Pooled prefixes | 506 (65%) |
| Rate centers | 181 |
| Companies holding prefixes | 55 |
| Assignment dates on file | 2001-01-16 to 2025-03-10 (210 prefixes) |
| ZIP codes in its places | 201 |
Rate centers in area code 918
| Rate center | Prefixes | Share |
|---|---|---|
| TULSA | 275 | 35% |
| BROKENARRW | 29 | 4% |
| MUSKOGEE | 28 | 4% |
| BARTLESVL | 26 | 3% |
| TAHLEQUAH | 20 | 3% |
| MCALESTER | 16 | 2% |
| JENKS | 12 | 2% |
| MIAMI | 11 | 1% |
| 173 other rate centers | 365 | 47% |
Who holds the prefixes in 918
Southwestern Bell holds the most prefixes, 233 (30%). 65% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Southwestern Bell | 233 | 30% |
| New Cingular Wireless PCS | 93 | 12% |
| Verizon Wireless | 50 | 6% |
| T-Mobile USA | 49 | 6% |
| Windstream Comm SW | 36 | 5% |
| United States Cellular | 32 | 4% |
| 49 other carriers | 289 | 37% |
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 918
- 1953-01-01 Area code 918 went into service.
- 2011-04-01 Area code 539 went into service as an overlay in the same area as 918.
Area codes nearest to 918
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 918
201 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Tulsa, OK | 52 |
| Claremore, OK | 3 |
| Muskogee, OK | 3 |
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 918 numbers
2,631 FCC complaints are on file for 2,197 numbers in 918, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 144 |
| 2024 | 136 |
| 2025 | 69 |
Other area codes in Oklahoma
Oklahoma is one state with 5 area codes in the NANPA table. 918 is one of them.
Next to 918 in the numbering table
These are the codes just before and after 918 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 918 was first assigned in Oklahoma. 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 Oklahoma next to a 918 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 918
Where is area code 918?
NANPA assigns area code 918 to Oklahoma, United States.
In which state does area code 918 sit?
Oklahoma. 918 is one of 5 area codes the NANPA table assigns to the state.
Which places does area code 918 cover?
The places with the most ZIP codes among the rate centers in 918 are Tulsa, OK, Claremore, OK and Muskogee, OK. The rate center list on this page shows all of them.
Who owns area code 918?
NANPA assigns area codes. Within 918, Southwestern Bell holds the most prefixes, 233 prefixes or 30%.
Which time zone does 918 use?
The NANPA NPA report lists the time zone for 918 as Central (C).
What year did 918 enter service?
The NANPA NPA report gives an in-service date of 1953-01-01, so 918 has been in use since 1953.
Does area code 918 have an overlay?
Yes. 539 (in service 2011-04-01) shares the same area with 918, so numbers from all of them are local to each other.
Which area codes are nearest to 918?
The area codes closest to 918, measured between the centers of the ZIP code places they serve, are 479 (about 97 miles), 572 (about 101 miles), 405 (about 105 miles), 580 (about 144 miles) and 417 (about 147 miles).
How many prefixes does area code 918 have?
NANPA's report dated 2026-10-17 lists 782 prefixes in service in 918, spread over 181 rate centers and 55 holders.
Are there complaints about 918 numbers?
The FCC data on file has 2,631 complaints for 2,197 numbers in 918. 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.