What cities are included in area code 408?

Area code 408 includes cities such as San Jose, Santa Clara, Campbell, Gilroy, Los Gatos, Milpitas, Morgan Hill, Saratoga, and Sunnyvale.

When was area code 408 established?

Area code 408 was established on March 1, 1959.

What is the current utilization rate of area code 408?

The current utilization rate of area code 408 is 70%.

Which major carriers operate within area code 408?

Major carriers in area code 408 include AT&T, Verizon, and T-Mobile.

What is the projected exhaustion date for area code 408?

Area code 408 is projected to be exhausted by 2025.

What type of area code is 408 considered?

Area code 408 is considered an overlay.

What historical changes have occurred to area code 408?

In 1998, a geographic split led to the creation of area code 831, and in 2012, an overlay with area code 669 was implemented.

Is 10-digit dialing required for area code 408?

Yes, 10-digit dialing has been mandatory for area code 408 since October 20, 2012.

Which state does area code 408 belong to?

Area code 408 belongs to the state of California.

How many numbers are available in area code 408?

Approximately 7.92 million numbers are available in area code 408.

What regulatory body oversees area code 408?

The California Public Utilities Commission (CPUC) regulates area code 408.

What services are supported by area code 408?

Area code 408 supports landline, wireless, and VoIP services.

What is the market share of AT&T in area code 408?

AT&T holds a 40% market share in area code 408.

What is the significance of area code 408 in California's telecommunications?

Area code 408 is crucial for telecommunications in the southern San Francisco Bay Area, covering key cities like San Jose and Santa Clara.

How does area code 408 relate to area code 669?

Area code 669 is an overlay of area code 408, implemented in 2012.

What is the NPA code for area code 408?

The NPA (Numbering Plan Area) code for area code 408 is 408.

How has area code 408 evolved over time?

Area code 408 has evolved through a geographic split in 1998 and an overlay in 2012 to meet increasing demand.

What is the market share of Verizon in area code 408?

Verizon holds a 30% market share in area code 408.

What counties does area code 408 cover?

Area code 408 covers parts of Santa Clara County and Northern Santa Cruz County.

Where can I find more information about area code 408?

More information about area code 408 can be found on the North American Numbering Plan Administration website.

Area Code 408: Locations, Carriers, and Regulations Explained

Area code 408 serves the southern San Francisco Bay Area, including parts of Santa Clara and Northern Santa Cruz counties in California.

What is Area Code 408?

Area code 408 is a crucial component of California's telecommunications network, primarily serving the southern San Francisco Bay Area. Established on March 1, 1959, it includes major cities like San Jose and Santa Clara.

Key Details

NPA Code: 408
Type: Overlay
Implementation Date: 1959
State: California

Geographic Coverage of Area Code 408

Area code 408 encompasses a significant portion of Santa Clara County and extends into parts of Northern Santa Cruz County.

Major Cities in Area Code 408

City	Latitude	Longitude
Campbell	37.28717	-121.94996
Gilroy	37.00578	-121.56828
Los Gatos	37.22661	-121.97468
Milpitas	37.42827	-121.90662
Morgan Hill	37.1305	-121.65439
San Jose	37.33939	-121.89496
Santa Clara	37.35411	-121.95524
Saratoga	37.26383	-122.02301
Sunnyvale	37.36883	-122.03635

Numbering and Utilization

Area code 408 has approximately 7.92 million numbers available, with a utilization rate of 70%. Projections suggest exhaustion by 2025.

Telecommunications Infrastructure

Major Carriers

AT&T: 40% market share
Verizon: 30% market share
T-Mobile: 20% market share
Others: 10% market share

Types of Services

Landline
Wireless
VoIP

Regulatory Overview

Area code 408 is regulated by the California Public Utilities Commission (CPUC). Compliance with the North American Numbering Plan Administration (NANPA) guidelines is mandatory.

Dialing Requirements

10-digit dialing has been mandatory since October 20, 2012.

Historical Milestones

1959: Area code 408 was created from area code 415.
1998: Geographic split led to the creation of area code 831.
2012: An overlay with area code 669 was implemented.

Conclusion

Area code 408 is vital for telecommunications in California's Bay Area, evolving through splits and overlays to meet increasing demand. It supports diverse services across various carriers.

For more detailed information, visit the North American Numbering Plan Administration website.

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