USA Area Code System
Exploring the North American Area Code System: Unveiling the Secrets of Geographic Codes, Efficient Call Routing, Cities, States, Population, and Time Zones.
Composition of Telephone Numbers
A telephone number typically consists of several components, including:
1. Country Code:
This is a numeric code that represents the country in which the phone number is registered. For example, the country code for the United States is +1.
2. Area Code (NPA in NANP):
In many countries, including the United States, Canada, and some Caribbean nations, an area code is used to identify a specific geographic region within the country. It is usually the first three digits of the phone number and is also referred to as the Numbering Plan Area (NPA) within the North American Numbering Plan (NANP).
3. Exchange Code (Central Office Code, NXX in NANP):
This part of the phone number narrows down the location even further. It identifies a central office or exchange within the area code. It's typically the next three digits after the area code and is also known as the Central Office Code or NXX within the NANP.
4. Subscriber Number:
This is the unique number that identifies an individual or business line within the exchange. It can vary in length depending on the country and local regulations.
5. Extension (Optional):
In some cases, there may be an extension number, especially for business phone systems. This allows for routing calls to specific individuals or departments within a company.
6. International Dialing Prefix (Optional):
When calling international numbers, you may need to include an international dialing prefix, like "011" in the United States, before the country code.
Example of a complete phone number format, within the NANP
- "+1" is the country code for the United States.
- "(555)" is the area code (NPA in NANP).
- "123" is the exchange code (NXX in NANP).
- "4567" is the subscriber number.
Area codes by State and Country
| States | Area Code |
| Alabama | 205, 251, 256, 334, 659 and 938 |
| Alaska | 907 |
| Arizona | 480, 520, 602, 623 and 928 |
| Arkansas | 479, 501 and 870 |
| California | 209, 213, 279, 310, 323, 341, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 820, 831, 858, 909, 916, 925, 949 and 951 |
| Colorado | 303, 719, 720 and 970 |
| Connecticut | 203, 475, 860 and 959 |
| Delaware | 302 |
| Florida | 239, 305, 321, 352, 386, 407, 561, 689, 727, 754, 772, 786, 813, 850, 863, 904, 941 and 954 |
| Georgia | 229, 404, 470, 478, 678, 706, 762, 770 and 912 |
| Hawaii | 808 |
| Idaho | 208 and 986 |
| Illinois | 217, 224, 309, 312, 331, 618, 630, 708, 773, 779, 815, 847 and 872 |
| Indiana | 219, 260, 317, 364, 463, 574, 765, 812 and 930 |
| Iowa | 319, 515, 563, 641 and 712 |
| Kansas | 316, 620, 785 and 913 |
| Kentucky | 270, 364, 502, 606 and 859 |
| Louisiana | 225, 318, 337, 504 and 985 |
| Maine | 207 |
| Maryland | 227, 240, 301, 302, 304, 410, 443, 667 and 681 |
| Massachusetts | 339, 351, 413, 508, 617, 774, 781, 857 and 978 |
| Michigan | 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947 and 989 |
| Minnesota | 218, 320, 507, 612, 651, 763 and 952 |
| Mississippi | 228, 601, 662 and 769 |
| Missouri | 314, 417, 573, 636, 660 and 816 |
| Montana | 406 |
| Nebraska | 308, 402 and 531 |
| Nevada | 702, 725 and 775 |
| New Hampshire | 603 |
| New Jersey | 201, 215, 267, 445, 551, 609, 640, 732, 848, 856, 862, 908 and 973 |
| New Mexico | 505 and 575 |
| New York | 212, 315, 332, 347, 516, 518, 585, 607, 631, 646, 680, 716, 718, 838, 845, 914, 917, 929 and 934 |
| North Carolina | 252, 336, 704, 743, 828, 910, 919, 980 and 984 |
| North Dakota | 701 |
| Ohio | 216, 220, 234, 283, 304, 326, 330, 380, 419, 440, 513, 567, 606, 614, 681, 740 and 937 |
| Oklahoma | 405, 539, 572, 580 and 918 |
| Oregon | 458, 503, 541 and 971 |
| Pennsylvania | 215, 223, 267, 272, 412, 445, 484, 570, 610, 717, 724, 814 and 878 |
| Rhode Island | 401 |
| South Carolina | 803, 839, 843, 854 and 864 |
| South Dakota | 605 |
| Tennessee | 423, 615, 629, 731, 865, 901 and 931 |
| Texas | 210, 214, 254, 281, 325, 346, 361, 409, 430, 432, 469, 512, 682, 713, 726, 737, 806, 817, 830, 832, 903, 915, 936, 940, 956, 972 and 979 |
| Utah | 385, 435 and 801 |
| Vermont | 603 and 802 |
| Virginia | 276, 434, 540, 571, 703, 757 and 804 |
| Washington | 206, 253, 360, 425, 509 and 564 |
| West Virginia | 304 and 681 |
| Wisconsin | 262, 414, 534, 608, 715 and 920 |
| Wyoming | 307 |
| Whasington DC | 202 and 771 |
FAQS
What is area code?
An area code, often referred to as an NPA (Numbering Plan Area), is a three-digit numerical prefix used in phone numbers to signify specific geographic regions within a country. It's a crucial part of telephone numbering systems and is used in various countries worldwide to facilitate efficient call routing.
How Many Area Codes Are There in the United States?
There are over 330 active area codes in the United States. However, this number can change over time as new area codes are introduced to meet the increasing demand for phone numbers due to population growth and the proliferation of devices. The North American Numbering Plan Administration (NANPA) is responsible for managing and assigning area codes in the United States.
Only us use area code?
No, Many countries around the world use area codes or their equivalent to designate specific geographic regions within their telephone numbering systems.
- In the United States, Canada and Australia, they are called "Area Codes."
- In the United Kingdom, they are referred to as "Area Dialing Codes."
- In Germany, they are called "Vorwahlnummern" or "Ortsvorwahlnummern."
What is NANPA?
NANPA, or the North American Numbering Plan Administration, is the organization responsible for managing telephone numbering in the United States, Canada, and certain Caribbean nations. They allocate area codes, assign telephone numbers, and ensure efficient call routing within the region.
How Many Area Codes Are There in Canada?
Canada had over 40 active area codes. However, the number of area codes in Canada can change over time. Canadian Numbering Administrator (CNA) is the organization responsible for numbering administration in Canada.