Area Code 918

Oklahoma (OK) * Tulsa, Broken Arrow, Bartlesville, Claremore, Muskogee, Adair, Afton, Agra * Central Time (CT)

1.6M

Population

227

ZIP codes

Oklahoma

Primary state

Central Time (CT)

Time zones

What stands out

Coverage: 1.6M people across 227 ZIP codes.
Overlapping area codes: 539
Major cities: Tulsa, Broken Arrow, Bartlesville.

Primary state:Oklahoma (OK)Major cities:Tulsa, Broken Arrow, Bartlesville, Claremore, Muskogee, Adair, Afton, Agra

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Basics

Percentiles compare this area code to other area codes nationwide.

Population

1.6M

ZIP codes

227

Median age

38.4 yrs

Population density

81.8/sq mi

Mean commute time

23 min

Avg. household size

2.5

Neighbors

Neighboring area codes

405 417 479 539 572 580 620 870

Notes & Sources

Area-code boundaries can change over time; verify official assignments with NANPA for critical use.
In regions with overlapping area codes, new numbers may use a different code.
This page aggregates ZIP-based crosswalks for orientation and does not indicate phone-number availability.

Data freshness

ACS 5-year: 2020–2024
Page updated: 2026-02-23

Release schedule and upstream dates: Sources.

Data sources

U.S. Census (ACS 5-year)U.S. Census TIGER/LineNANPA

Derived statistics

Area codes are not Census geographies; statistics are estimated by aggregating ZCTA (ZIP) values for associated ZIPs.
ZIP↔area code associations are derived from NPA boundary polygons and ZCTA centroid points, and can be approximate.
Median age, mean commute, and household size are population-weighted; population density uses summed ZIP land area.

Area code overlays and service areas are primarily governed by NANPA; this page uses aggregated geographic overlays for orientation only.

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.

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