Area Code 918 — Tulsa, Oklahoma

NANP area code

918

UTC−6, UTC−5 during daylight saving

State
Oklahoma
Primary city
Tulsa
Time zone
Central
In service
1953
Overlay
539

The code reaches 205 communities and 29 counties across Oklahoma.

Was this call legitimate?

The area code itself carries no risk signal. 918 is assigned to Tulsa, Oklahoma, so a call from it is consistent with a real caller in that area — but the digits alone prove nothing, because they can be forged.

Caller ID is set by whoever places the call, not verified by the network. That is why neighbour spoofing works: an operation anywhere in the world can display a number that matches the area code — and often the first three digits after it — of the person being called, so the call looks local. Every community in the 918 territory is a plausible-looking origin for a forged 918 number, which is why one can be made to look like a neighbour to so many people. The same applies to its overlay code 539, which serves the same ground.

If you did not recognise the call: let it go to voicemail — a legitimate caller with real business will leave one. Do not return the call using the number shown; look the organisation up independently and call the number you found. Never confirm personal details, card numbers, or one-time codes to someone who called you, however plausible the number looked.

Codes.zone publishes no complaint counts, risk scores, or caller identities. We hold no data on individual numbers and will not estimate what we cannot source.

Local time and when to call back

Time there now

Central · UTC−6, UTC−5 during daylight saving

Reasonable callback window

8:00 AM – 9:00 PM

local time in Central

Federal rules bar telemarketing calls to a residence outside 8:00 AM–9:00 PM in the called party's own time zone. It is a sensible bound for a personal callback too — and a caller who rang you well outside it was not observing it.

Overlay codes and ten-digit dialling

918 does not have its territory to itself. 539 covers the same ground, serving Tulsa and the rest of the 918 territory. An overlay is what a regulator adds when a region runs out of assignable numbers: rather than splitting the area and forcing half the residents to change their number, a second code is laid over the top and new numbers are issued from it.

The practical consequence: two neighbours on the same street can hold numbers in different area codes, so the code tells you nothing about which part of town a caller is in — and local calls must be dialled as all ten digits, because seven is no longer unambiguous.

Cities served

largest 20 by ZIP count
Communities served by area code 918, ranked by how many ZIP codes each holds.
CityZIP codesCounty
Tulsa52Creek County
Bartlesville4Washington County
Broken Arrow4Tulsa County
Claremore3Rogers County
Muskogee3Muskogee County
Braggs2Muskogee County
Grove2Delaware County
Mcalester2Pittsburg County
Miami2Ottawa County
Pryor2Mayes County
Sapulpa2Creek County
Tahlequah2Cherokee County
Wagoner2Wagoner County
Adair1Mayes County
Afton1Ottawa County
Agra1Lincoln County
Albion1Pushmataha County
Alderson1Pittsburg County
Arkoma1Le Flore County
Avant1Osage County

185 further communities not listed. All Oklahoma area codes →

Each point is a community served by 918, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Scope every community matched to 918. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot), GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . Coordinates are place reference points, not boundaries.

Counties

Prefixes inside 918

We do not publish the NXX prefixes inside 918. The assignment of prefixes to rate centres comes from LERG routing data, which is proprietary, and we will not estimate it from postal data — ZIP codes and telephone prefixes do not map onto each other. Awaiting a clean-rights NPA-NXX source.

Why this code exists

918 has served this territory since 1953. It eventually ran short of exchanges to hand out, and rather than split the region and make half its residents change their number, the regulator laid 539 over the same ground in 2011. New lines here are issued from the newer code, which is why a neighbour’s number may not start with 918.