Area Code 412: Pittsburgh, Pennsylvania Coverage & History

Area code 412 covers Pittsburgh and surrounding areas in Pennsylvania. It is one of the original 86 area codes established by AT&T in 1947. Today it shares its territory with overlay code 878. For the full picture, see all Pennsylvania area codes.

Quick Facts: Area Code 412

State	Pennsylvania
Primary city	Pittsburgh
Cities also served	Pittsburgh, Bethel Park, Monroeville, McKeesport, Mount Lebanon, Wilkinsburg, Carnegie, West Mifflin
Time zone	Eastern (UTC-5 / UTC-4 DST)
Year established	January 1, 1947
Original 1947 NPA?	Yes
Overlay codes	878
Currently in use?	Yes, actively assigned
Ten-digit dialing required?	Yes

History of Area Code 412

Area code 412 is one of the 86 original area codes created by AT&T in 1947, when the first nationwide numbering plan went into effect on January 1 of that year. It was assigned to Pennsylvania as part of the initial map that divided the United States and Canada into geographic dialing regions.

Since its activation, the geographic area covered by 412 has been reshaped by the following splits:

• 1998 — area code 724 split off to cover On February 1, 1998, most of southwestern Pennsylvania outside Allegheny County was split off into the new area code 724, leaving 412 focused on Pittsburgh and its close-in suburbs.
• 2001 — area code 878 split off to cover On August 17, 2001, area code 878 was introduced as an all-services overlay for both the 412 and 724 numbering plan areas to relieve number exhaustion driven by the proliferation of cell phones and pagers, making ten-digit dialing mandatory across southwestern Pennsylvania.

Overlay codes have been added to the same geographic territory in:

• 2001 — area code 878 activated as an overlay

Cities and Areas Served by 412

Area code 412 serves City of Pittsburgh, most of Allegheny County, and small portions of Washington and Westmoreland counties, including the following cities and communities:

• Pittsburgh
• Bethel Park
• Monroeville
• McKeesport
• Mount Lebanon
• Wilkinsburg
• Carnegie
• West Mifflin

Nearby area codes covering the same broader region include: 724, 878.

Overlay Codes 412

Area code 878 shares the same geographic territory as 412 (added in 2001). New phone numbers in the region may be assigned either code.

Because multiple area codes serve the same area, ten-digit dialing is mandatory for all local calls. A call from any of these codes originates from the same geographic region in Pennsylvania.

The Cultural Weight of a 412 Number

Area code 412 is one of the original 86 numbering plan areas created in 1947 when AT&T and the Bell System built the North American Numbering Plan from scratch. It was assigned to the entire southwestern corner of Pennsylvania — from Butler County to the West Virginia border — reflecting the industrial weight of a region that was then among the most productive in the country. Pittsburgh sat at the center of that territory, its steel mills lining the banks of the Monongahela, Allegheny, and Ohio rivers and supplying the materials that built mid-century America. As telephone demand grew with the post-war boom in cell phones and pagers, the code underwent a geographic split on February 1, 1998, spinning off area code 724 for the outer suburbs, and then received the 878 overlay on August 17, 2001, mandating ten-digit dialing across the region. Through all those changes, 412 held the core: Pittsburgh, Allegheny County, and the identity of a city that earned its nickname “Steel City” from more than 300 steel-related businesses that once defined its economy.

Few three-digit codes carry the local pride that 412 does in Pittsburgh. Residents routinely refer to the city itself as “the 412,” and the number appears on apparel, murals, and business logos throughout the region. Pittsburgh’s sports culture reinforces that identity year-round: the NFL’s Pittsburgh Steelers — six-time Super Bowl champions — play at Acrisure Stadium on the North Shore, the NHL’s Pittsburgh Penguins have won five Stanley Cups, and the Pittsburgh Pirates play at PNC Park, one of the most celebrated ballparks in baseball. The city’s neighborhoods add texture to the code’s cultural footprint: the Strip District’s weekend markets, Lawrenceville’s gallery row, Squirrel Hill’s close-knit residential character, and the hillside views from Mount Washington above the downtown Golden Triangle. Pittsburgh-born Andy Warhol has his own museum in the city’s North Shore — the largest museum in the United States dedicated to a single artist — and the Carnegie Museum of Art and Carnegie Museum of Natural History anchor the Oakland cultural district near the University of Pittsburgh and Carnegie Mellon University, which together have made the 412 a recognized address in robotics and artificial intelligence research. Films including “The Dark Knight Rises” (2012) and “Perks of Being a Wallflower” (2012) used Pittsburgh locations prominently, bringing the city’s bridges and skyline to global audiences.

How to Get a Phone Number with Area Code 412

There are three ways to get a phone number with the 412 area code, each suited to a different need:

1. Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 412 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 412 inventory.
2. Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 412 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
3. Port an existing 412 number. If you already have a 412 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Pennsylvania sometimes can’t accept inbound ports of 412 numbers due to 911 routing rules.

Looking for a 412 number? 212areacode.com offers premium 412 numbers for Pittsburgh, Pennsylvania — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 412 numbers →

Frequently Asked Questions

Is the 412 area code still in use?
Yes. 412 is actively assigned to new phone lines in City of Pittsburgh, most of Allegheny County, and small portions of Washington and Westmoreland counties.

What is the difference between 412 and 878?
Today they share the same geographic territory in Pennsylvania. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.

Can I get a 412 number if I don't live in Pennsylvania?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 412 number from anywhere in the world. The number routes to whatever device or carrier you specify.

Is 412 a scam area code?
No. 412 is a legitimate, active area code for City of Pittsburgh, most of Allegheny County, and small portions of Washington and Westmoreland counties. Like any area code, scammers occasionally spoof 412 caller IDs, but the code itself is heavily used by real Pennsylvania businesses, government offices, and residents.

Is 412 one of the original area codes?
Yes. Area code 412 was established on January 1, 1947, as one of the original 86 numbering plan areas created when AT&T built the North American Numbering Plan. It is one of the oldest area codes still in active service.

What overlay codes share the 412 territory today?
Area code 878 is the overlay for the 412 numbering plan area, introduced on August 17, 2001. All local calls within the 412/878 region require ten-digit dialing.

Why does Pittsburgh have both 412 and 724?
On February 1, 1998, area code 412 was split to create 724, which took over most of southwestern Pennsylvania outside Allegheny County. Area code 412 was retained for Pittsburgh and its close-in suburbs. Both codes then received the 878 overlay in 2001.

What cities does the 412 area code cover?
The 412 area code covers Pittsburgh and most of Allegheny County, including communities such as Bethel Park, Monroeville, McKeesport, Mount Lebanon, Carnegie, West Mifflin, and Wilkinsburg, along with small portions of Washington and Westmoreland counties.

Related Reading

• Why Use Area Codes For Local Calls?
• What States Have the Most Area Codes?
• Most Desirable Area Codes
• How Do Area Codes Work?

See where it sits in the full US area code directory.