What is the primary city served by area code 503?

The primary city served by area code 503 is Aloha, Oregon.

Which state is covered by area code 503?

Area code 503 covers the state of Oregon.

Is area code 503 only for Aloha, Oregon?

No, area code 503 also serves other cities in the Portland metropolitan area, including Portland, Salem, and Beaverton.

When was area code 503 established?

Area code 503 was established in 1947.

Does area code 503 require ten-digit dialing?

Yes, due to the overlay with area code 971, ten-digit dialing is required for area code 503.

Which county is Aloha, Oregon located in?

Aloha, Oregon is located in Washington County.

What are the geographic coordinates of Aloha, Oregon?

The geographic coordinates of Aloha, Oregon are approximately 45.49428° N latitude and -122.86705° W longitude.

What is the dialing pattern for local calls within area code 503?

The dialing pattern for local calls within area code 503 is 10D (10 digits).

What is the dialing pattern for toll calls within area code 503?

The dialing pattern for toll calls within area code 503 is 1+10D (1 plus 10 digits).

What are some major cities in the Portland metropolitan area covered by area code 503?

Some major cities in the Portland metropolitan area covered by area code 503 include Portland, Salem, Beaverton, Hillsboro, and Gresham.

What is an overlay in terms of area codes?

An overlay is when two or more area codes serve the same geographic region, requiring ten-digit dialing.

Which area code is overlaid with area code 503?

Area code 971 is overlaid with area code 503.

Which major telecom carriers operate in area code 503?

Major telecom carriers operating in area code 503 include Verizon, AT&T, and T-Mobile.

How has area code 503 changed since its creation?

Area code 503 originally covered the entire state of Oregon but was split to accommodate population growth and increased demand for phone numbers.

What is the purpose of the North American Numbering Plan (NANP)?

The North American Numbering Plan (NANP) is a telephone numbering plan for the United States, Canada, and other countries in North America, designed to facilitate efficient and standardized telecommunications.

Is area code 503 used for both residential and business phone numbers?

Yes, area code 503 is used for both residential and business phone numbers within its coverage area.

Do I need to dial '1' before making local calls within area code 503?

No, you do not need to dial '1' for local calls within area code 503, only for toll calls.

Where can I find more information about area codes and regulations?

For more information about area codes and regulations, you can visit the Federal Communications Commission (FCC) website or the North American Numbering Plan Administration (NANPA) website.

What is the significance of the Portland metropolitan area in terms of area code 503?

The Portland metropolitan area is significant because it is the primary region served by area code 503, encompassing major cities and economic activities.

Comprehensive Guide to Area Code 503: Aloha, Oregon

Area code 503 is a telephone area code in the North American Numbering Plan (NANP) for the state of Oregon, specifically covering the city of Aloha. This guide provides detailed information about area code 503, including its geographic coverage, regulatory details, and frequently asked questions.

Where is Area Code 503 Located?

Area code 503 serves the northwestern region of Oregon, including the city of Aloha. Aloha is situated in Washington County, part of the Portland metropolitan area. The coordinates for Aloha are approximately 45.49428° N latitude and -122.86705° W longitude.

Geographic Coverage

State: Oregon (OR)
Major City: Aloha
County: Washington
Country: United States

Area code 503 is one of the original area codes established in 1947 and covers a significant portion of northwestern Oregon. It is primarily used in the Portland metropolitan area, encompassing cities like Portland, Salem, and Beaverton.

Regulatory Information

Dialing Patterns

Standard HNPA (Home NPA) LOCAL: 10D (10 digits)
Standard HNPA TOLL: 1+10D (1 plus 10 digits)
Standard FNPA (Foreign NPA) LOCAL: 10D (10 digits)
Standard FNPA TOLL: 1+10D (1 plus 10 digits)
Standard OPERATOR ASSISTED: 0+10D (0 plus 10 digits)

The dialing patterns for area code 503 are standardized to facilitate local and long-distance calling within the region.

Cities and Regions Covered by Area Code 503

Area code 503 serves several cities and towns in Oregon, including but not limited to:

Portland
Salem
Beaverton
Hillsboro
Gresham
Aloha

These cities are part of the greater Portland area, known for its vibrant culture and economic activities.

Frequently Asked Questions

What is the history of Area Code 503?

Area code 503 was one of the original area codes created in 1947. It initially covered the entire state of Oregon but was eventually split to accommodate the growing population and demand for telephone numbers.

Are there any overlays for Area Code 503?

Yes, area code 503 shares an overlay with area code 971. This means that both area codes serve the same geographic region, and ten-digit dialing is required.

How do I call a number within Area Code 503?

To call a number within area code 503, dial the ten-digit number, which includes the area code and the seven-digit local number. For toll calls, prefix the number with '1'.

What carriers operate in Area Code 503?

Various carriers provide services in area code 503, including major telecom companies like Verizon, AT&T, and T-Mobile, as well as local providers.

Conclusion

Area code 503 is a vital part of Oregon's telecommunications infrastructure, serving a diverse and economically significant region. Understanding its coverage, dialing patterns, and history can help both residents and businesses navigate their communication needs effectively.

For more information, consider visiting Federal Communications Commission (FCC) or North American Numbering Plan Administration (NANPA).

Explore more about area codes and telecommunications in our Telecommunications Resources section.

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