Question 1

What is area code 412?

Accepted Answer

Area code 412 is a telephone area code in the North American Numbering Plan (NANP) that covers Pittsburgh, Pennsylvania, and its surrounding regions.

Question 2

When was area code 412 implemented?

Accepted Answer

Area code 412 was implemented in 1947.

Question 3

Which cities are covered by area code 412?

Accepted Answer

Area code 412 covers cities such as Pittsburgh, Bethel Park, McKeesport, Mount Lebanon, Monroeville, Penn Hills, Plum, Upper Saint Clair, and West Mifflin.

Question 4

What counties does area code 412 serve?

Accepted Answer

Area code 412 serves parts of Allegheny, Washington, and Westmoreland counties.

Question 5

What type of area code is 412?

Accepted Answer

Area code 412 is an overlay type area code.

Question 6

Which major carriers provide services in area code 412?

Accepted Answer

The major carriers providing services in area code 412 include Verizon, AT&T, T-Mobile, and Comcast.

Question 7

What services are offered in area code 412?

Accepted Answer

Services offered in area code 412 include landline, wireless, and VoIP.

Question 8

Is ten-digit dialing required in area code 412?

Accepted Answer

Yes, ten-digit dialing has been mandatory in area code 412 since 2001.

Question 9

What is the significance of the year 1998 for area code 412?

Accepted Answer

In 1998, area code 724 was split from 412 to address the growing demand for new numbers.

Question 10

What was introduced in 2001 related to area code 412?

Accepted Answer

In 2001, area code 878 was introduced as an overlay to both 412 and 724.

Question 11

Who regulates area code 412?

Accepted Answer

The Pennsylvania Public Utility Commission (PUC) regulates area code 412.

Question 12

What is the North American Numbering Plan (NANP)?

Accepted Answer

The North American Numbering Plan (NANP) is a telephone numbering plan that encompasses 25 regions in twenty countries, primarily in North America.

Question 13

Why was area code 878 introduced?

Accepted Answer

Area code 878 was introduced to ensure continued availability of phone numbers in the region covered by area codes 412 and 724.

Question 14

How does area code 412 impact businesses in Pittsburgh?

Accepted Answer

Area code 412 provides essential telecommunications services that support business operations in Pittsburgh and its surrounding areas.

Question 15

What historical significance does area code 412 have?

Accepted Answer

Area code 412 is one of the original North American area codes established in 1947, highlighting its long-standing role in regional telecommunications.

Question 16

How has area code 412 evolved over time?

Accepted Answer

Area code 412 has evolved through splits and overlays, such as the introduction of area codes 724 and 878, to accommodate increasing demand for phone numbers.

Question 17

What is an area code overlay?

Accepted Answer

An area code overlay is a telecommunications technique where a new area code is added to the same geographic region as an existing area code, allowing for more phone numbers.

Question 18

What is the geographic coordinate of Pittsburgh in area code 412?

Accepted Answer

The geographic coordinate of Pittsburgh in area code 412 is [40.44062, -79.99589].

Question 19

What is the role of the Pennsylvania Public Utility Commission (PUC) in area code 412?

Accepted Answer

The Pennsylvania Public Utility Commission (PUC) ensures compliance with NANPA guidelines and regulates telecommunications services in area code 412.

Question 20

Where can I find more information about area codes and number management?

Accepted Answer

For more information on area codes and number management, you can visit the North American Numbering Plan Administration website at https://www.nationalnanpa.com/.

Question 21

What is the North American Numbering Plan Administration (NANPA)?

Accepted Answer

The NANPA is an organization responsible for administering telephone numbering resources in North America, including area codes like 412.

Question 22

How does the overlay of area code 878 affect residents and businesses in the 412 area?

Accepted Answer

The overlay of area code 878 in the 412 region means that residents and businesses must dial ten digits (area code + phone number) for all calls to ensure proper routing.

Question 23

Besides Pittsburgh, what other notable cities use the 412 area code?

Accepted Answer

Besides Pittsburgh, other notable cities using the 412 area code include Bethel Park, McKeesport, and Monroeville.

Question 24

How can I find out if a phone number belongs to area code 412?

Accepted Answer

You can identify a phone number as belonging to area code 412 if the first three digits of the number are 412.

Question 25

What impact did the creation of area code 724 have on the 412 area code?

Accepted Answer

The creation of area code 724 reduced the geographic area covered by 412, allowing for more phone numbers to be assigned in both regions.

Question 26

Are there any current plans for further area code splits or overlays in the Pittsburgh region?

Accepted Answer

You can consult the Pennsylvania Public Utility Commission (PUC) or the NANPA website for the latest information on area code planning in the Pittsburgh region.

Question 27

What telecommunication services rely on area code 412 in Pittsburgh?

Accepted Answer

Landline, wireless, and VoIP services in Pittsburgh rely on area code 412 for proper routing and connectivity.

Question 28

How does the regulatory framework ensure the efficient management of area code 412?

Accepted Answer

The regulatory framework, overseen by the Pennsylvania PUC, ensures compliance with NANPA guidelines and efficient allocation of phone numbers within area code 412.

Question 29

What are the geographic boundaries of area code 412?

Accepted Answer

Area code 412 covers Pittsburgh and parts of Allegheny, Washington, and Westmoreland counties in Pennsylvania.

Question 30

How does mandatory ten-digit dialing affect call patterns within and outside of area code 412?

Accepted Answer

Mandatory ten-digit dialing ensures all calls, both within and outside area code 412, are correctly routed, especially with the overlay of area code 878.

Area Code 412: Comprehensive Guide to Pittsburgh's Phone Network

Introduction

Key Details and Technical Specifications

Geographic Coverage

Major Cities Served

Network Infrastructure and Carriers

Major Carriers

Services Offered

Regulatory Framework

Historical Milestones

Conclusion