What cities are covered by Area Code 303?

Area Code 303 covers several cities in Colorado, including Denver, Boulder, Aurora, Lakewood, Arvada, Westminster, Thornton, and Longmont.

When was Area Code 303 implemented?

Area Code 303 was implemented in 1947 as part of the North American Numbering Plan.

Which telecom providers operate in Area Code 303?

Major telecom providers in Area Code 303 include AT&T, Verizon, and T-Mobile.

Is ten-digit dialing required in Area Code 303?

Yes, ten-digit dialing is mandatory for all calls within Area Code 303.

What are the overlay area codes for 303?

The overlay area codes for 303 are 720 and 983.

When was Area Code 720 added to Area Code 303?

Area Code 720 was added as an overlay to Area Code 303 in 1998.

What is the geographic region of Area Code 303?

Area Code 303 primarily serves the north-central region of Colorado.

How many phone numbers are available in Area Code 303?

There are approximately 23.8 million phone numbers available in Area Code 303.

What is the exhaust projection for Area Code 303?

The exhaust projection for Area Code 303 is 2023.

What type of services are offered in Area Code 303?

Services offered in Area Code 303 include landline, wireless, and VoIP.

What was the original area code for the entire state of Colorado?

Area Code 303 was originally the area code for the entire state of Colorado.

When was Area Code 719 split from 303?

Area Code 719 was split from 303 in 1988.

When was Area Code 970 created from 303?

Area Code 970 was created from 303 in 1995.

When was Area Code 983 introduced?

Area Code 983 was introduced as an additional overlay in 2022.

What is the significance of Area Code 303 in Colorado?

Area Code 303 is significant as it serves major cities like Denver and Boulder, supporting a diverse and growing population.

How can I learn more about the regulatory framework for Area Code 303?

For more information on the regulatory framework, visit the Colorado Public Utilities Commission website.

What does the term 'overlay' mean in telecommunications?

In telecommunications, an 'overlay' refers to an additional area code that serves the same geographic region as an existing area code to meet the demand for more phone numbers.

Where can I find more information about Area Code 303?

You can find more information about Area Code 303 on the Colorado Public Utilities Commission website or Wikipedia.

What is the NPA code for Area Code 303?

The NPA (Numbering Plan Area) code for Area Code 303 is 303 itself.

Area Code 303: Cities, Coverage, and Telecom Insights in Colorado

Area Code 303 is a vital part of Colorado's telecommunications landscape. It primarily serves the north-central region, encompassing major cities like Denver and Boulder. This guide will provide you with detailed insights into its coverage, history, regulatory framework, and the telecom services available.

What is Area Code 303?

Area Code 303 is part of the North American Numbering Plan (NANP), originally implemented in 1947. It covers a significant portion of Colorado, particularly the north-central areas, and is overlaid by Area Codes 720 and 983 to meet the growing demand for phone numbers.

Quick Facts:

NPA Code: 303
State: Colorado
Type: Overlay
Implementation Date: 1947

Geographic Coverage of Area Code 303

Area Code 303 covers several key cities in Colorado, offering a mix of urban and suburban environments. Here are some of the major cities within this area code:

City	Latitude	Longitude
Denver	39.73915	-104.9847
Boulder	40.01499	-105.27055
Aurora	39.72943	-104.83192
Lakewood	39.70471	-105.08137
Arvada	39.80276	-105.08748
Westminster	39.83665	-105.0372
Thornton	39.86804	-104.97192
Longmont	40.16721	-105.10193

Telecommunications Infrastructure

Major Carriers

Area Code 303 is supported by several major telecommunications providers, offering a range of services:

AT&T
Verizon
T-Mobile

Services Offered

Landline
Wireless
VoIP

Regulatory Framework

The Colorado Public Utilities Commission regulates telecommunications in the state, ensuring compliance with national standards and local requirements. Here are some key points:

Ten-Digit Dialing: Mandatory for all calls within the area.
Overlay Complex: Includes Area Codes 720 and 983.

For more detailed regulatory information, visit the Colorado Public Utilities Commission.

Historical Milestones

1947: Area Code 303 was established as one of the original area codes.
1988: Area Code 719 was split from 303.
1995: Area Code 970 was created from 303.
1998: Area Code 720 was added as an overlay.
2022: Area Code 983 was introduced as an additional overlay.

Numbering Statistics

Total Numbers Available: Approximately 23.8 million
Exhaust Projection: 2023

Conclusion

Area Code 303 is crucial for Colorado's communication needs, serving a diverse and rapidly growing population. Its integration with Area Codes 720 and 983 ensures that the region continues to meet the demand for new numbers. For more information, you can explore additional resources on the Colorado Public Utilities Commission or learn more about Area Code 303 on Wikipedia.

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