402 Area Code: Omaha, Lincoln & Nebraska's 531 Overlay

The 402 area code covers eastern Nebraska and has served the region since January 1, 1947 — one of the 86 original area codes established when AT&T launched the North American Numbering Plan. Omaha, Lincoln, Bellevue, Fremont, Norfolk, and every other major population center in eastern Nebraska share the 402 code.

Western Nebraska operates under 308, a separate code split from 402 in 1962. By 2015, rapid mobile and VoIP growth pushed 402 toward exhaustion, prompting the addition of a full overlay: 531, which opened a second number pool without changing any existing 402 number. Today both codes serve the same eastern Nebraska geography, with Central Time as the shared time zone.

This guide explains where 402 reaches, how the 531 overlay changed dialing rules, why Omaha became one of America's most unexpected financial capitals, and what it means when a 402 number shows up in California or Texas search results.

Where 402 reaches — and where 308 takes over

The 402 area code location is eastern Nebraska — the more densely populated half of the state, anchored by the Omaha metropolitan area and Nebraska's capital, Lincoln. The geographic boundary between 402 and 308 runs roughly north-south through central Nebraska.

Cities in the 402 area code:

Cities in the 308 area code (western Nebraska) — NOT in 402: Grand Island · Kearney · North Platte · Scottsbluff · Alliance · Ogallala · McCook

The dividing line is not a strict county boundary — some large counties that straddle the divide have exchanges under both 402 and 308 depending on the specific community. If you are unsure whether an address falls under 402 or 308, check the NANPA number resource portal by ZIP code. For context on how other original 1947 codes have aged, 401 covers all of Rhode Island and has never required a split in nearly 80 years — a contrast to Nebraska's faster growth trajectory.

How 531 became 402's overlay

By the early 2010s, eastern Nebraska's explosive growth in mobile subscriptions and VoIP lines had pushed the 402 number pool toward exhaustion. Rather than split the region — which would have separated Omaha from Lincoln or required businesses to change numbers — regulators chose an all-services overlay: a second area code assigned to the identical geographic footprint without displacing a single existing number.

Timeline of the 531 overlay:

• August 1, 2015 — Mandatory 10-digit dialing began across the entire 402 region. From this date, all calls — even local — required the full 10-digit number including the area code.
• October 1, 2015 — Area code 531 went live as a full overlay on 402. New subscribers began receiving 531 numbers; all existing 402 numbers remained permanently unchanged.

What the overlay means in practice:

An Omaha business on 402-XXX-XXXX and a neighbor on 531-XXX-XXXX are on the same block — same geography, same rates, always local. New subscribers do not choose their code; the carrier assigns whichever number is next in the available pool. If you need a specific Omaha or Lincoln city prefix, a VoIP provider can search available exchanges across both 402 and 531.

Area code 402 through the decades

January 1, 1947 — Area code 402 launched as one of 86 original codes in AT&T's North American Numbering Plan, covering the entire state of Nebraska from Omaha to the Wyoming border. Nebraska's population was concentrated in the east, but the code served the whole state from day one.

1962 — Western Nebraska's growth in agriculture, ranching, and railroad services justified its own code. 308 was split from 402 to serve everything west of the central Nebraska boundary — from Grand Island to Scottsbluff. Area code 402 contracted to eastern Nebraska only, a footprint it has held ever since.

1990s–2000s — Mobile phone adoption, internet dial-up service, and later VoIP accelerated number consumption across the Omaha and Lincoln metro areas. Subscriber growth outpaced what the 402 pool could sustain indefinitely.

August–October 2015 — NANPA activated the 531 overlay. Ten-digit dialing became mandatory August 1; area code 531 went live October 1. Nebraska joined the growing list of states where a single major metro requires two area codes to serve one geography.

What the 402 economy runs on

Omaha's economic profile defies its population rank. The metro area punches far above its size, anchored by a cluster of globally significant institutions:

Berkshire Hathaway and the "Oracle of Omaha" Warren Buffett has operated Berkshire Hathaway from Omaha since 1962, turning a struggling textile company into one of the world's largest conglomerates by market capitalization. The annual Berkshire shareholder meeting — known as the "Woodstock for Capitalists" — draws more than 40,000 attendees to Omaha each May, generating an estimated $100 million in local economic impact for a single weekend.

Union Pacific Railroad Union Pacific has been headquartered in Omaha since helping complete the first transcontinental railroad in 1869. It operates roughly 32,000 miles of track across 23 western states and is one of the most storied freight railroad operators in the United States — Omaha's most historically rooted major institution.

Offutt Air Force Base and US Strategic Command Bellevue's Offutt AFB is home to US Strategic Command (USSTRATCOM) — one of the Department of Defense's eleven unified combatant commands, responsible for strategic deterrence, space operations, and global strike planning. With more than 10,000 military and civilian employees, Offutt is among the largest single-site employers in Nebraska and a cornerstone of the region's defense economy.

Insurance and financial services Mutual of Omaha — one of the United States' largest mutual insurance companies — has been headquartered in Omaha since 1909. Kiewit Corporation (construction and engineering), First National Bank of Omaha, and a growing fintech sector round out the financial services cluster. Contact us to find available 402 or 531 prefixes for your Omaha or Lincoln business presence.

Is 402 in California or Texas?

No — 402 is Nebraska's area code and is not assigned in California or Texas. Both states operate under their own extensive sets of codes; 402 is not among them.

The search pattern "402 area code California" or "402 area code Texas" reflects a straightforward dynamic: Omaha-based businesses, call centers, and financial services firms make a high volume of outbound calls to California and Texas — two of America's largest consumer markets. When a California or Texas resident receives a call from a 402 number and doesn't recognize the Nebraska connection, they search their own state to try to identify the call's origin. The answer is always the same: a 402 number originates in eastern Nebraska, regardless of where the recipient is located.

This pattern is especially pronounced for 402 because of Omaha's unusually large insurance and financial services sector. Mutual of Omaha, First National Bank, and numerous financial call centers make routine outbound calls to all 50 states — which is why 402 numbers are disproportionately familiar to people far from Nebraska.

402 area code ZIP codes

Common ZIP codes within the 402 / 531 coverage area — useful for verifying whether an address falls inside the eastern Nebraska footprint:

Omaha 68101 · 68102 · 68104 · 68105 · 68106 · 68107 · 68108 · 68110 · 68111 · 68112 · 68114 · 68116 · 68117 · 68118 · 68122 · 68124 · 68127 · 68128 · 68130 · 68131 · 68132 · 68134 · 68135 · 68136 · 68137 · 68138 · 68144 · 68154 · 68164

Lincoln 68501 · 68502 · 68503 · 68504 · 68505 · 68506 · 68507 · 68508 · 68510 · 68512 · 68514 · 68516 · 68517 · 68520 · 68521 · 68522 · 68523 · 68524 · 68526 · 68528

Bellevue / Sarpy County 68005 · 68123 · 68133 · 68147 · 68157

Fremont 68025 · 68026

Norfolk 68701 · 68702

ZIP code and area code boundaries do not always align precisely. A small number of addresses near the 402 / 308 boundary may fall under different codes. Check the specific NPA-NXX assignment at NANPA's number resource portal for borderline addresses.

Scam calls from 402 numbers

Robocallers spoof 402 and 531 numbers to appear as though they are calling from Omaha or Lincoln — cities associated with financial services and insurance, which lend the calls a veneer of legitimacy. Common spoofed 402 schemes include:

• Financial services impersonation — Callers pose as Mutual of Omaha, First National Bank, or investment firms, exploiting Omaha's well-known financial reputation.
• Medicare and Social Security scams — Common in any area code but amplified when spoofed from a recognizable Midwest financial hub.
• Auto warranty and health insurance pitches — High-volume robocall campaigns using spoofed local numbers to increase answer rates.
• Text scams (smishing) — Fraudulent 402 texts about package deliveries, prize winnings, or account alerts with malicious links.

The FCC's STIR/SHAKEN call authentication framework requires carriers to verify caller ID — the reason many phones now show "Spam Risk" before suspected spoofed calls connect. If a 402 number calls and leaves no voicemail, treat it as a likely spoof.

Key takeaways

• 402 is eastern Nebraska's area code — Omaha, Lincoln, Bellevue, Fremont, Norfolk — in continuous service since January 1, 1947.
• 308 covers western Nebraska (Grand Island, Kearney, North Platte, Scottsbluff); 402 and 308 are separate codes divided by a north-south boundary through central Nebraska.
• 531 is the 402 overlay, active since October 1, 2015. No existing 402 number changed; 531 opened a new number pool for the same geography. Mandatory 10-digit dialing has been required since August 1, 2015.
• 402 is not in California or Texas — it is exclusively a Nebraska code; high outbound call volume from Omaha's financial sector drives those search queries.
• Time zone: Central (CT) — CST (UTC −6) in winter, CDT (UTC −5) during Daylight Saving Time.
• Omaha is home to Berkshire Hathaway, Union Pacific Railroad, USSTRATCOM at Offutt AFB, and Mutual of Omaha — a concentrated cluster of Fortune 500 and defense institutions unusual for a city its size.

Frequently asked questions