Where Is Area Code 415 In Usa – Numbering plan areas in California (blue) and border states. Area codes 415 and 628 are shown in red.
Area codes 415 and 628 are telephone area codes for the city of San Francisco and its northern Marin County suburbs (across the Golden Gate) and the northeastern corner of San Mateo County. The 415 area code was one of eighty-six original North American area codes established in 1947, but was later changed to a geographic format. The 628 area code was assigned in 2015 to create an overlap in this area of the numbering plan to reduce central office prefix exhaustion.
Where Is Area Code 415 In Usa
When AT&T installed the North American Numbering Plan to select carriers for a fee in 1947, the state of California was divided into three Numbering Plan Areas (NPAs), which were divided into geographic zones: South, Central, and North. state.
Area Code. Location. Timezone. Toll Free? Scam? Who’s Calling?
Area code 415 is assigned to central California, area code 916 to the south, and area code 213 to the north. It stretches from Sacramento in the north to Bakersfield in the south.
In 1950, the boundaries of the numbering plan area were redrawn to form a north-central division along a north-south line. Numbering plan area 415 became the coastal area from the north coast to the Oregon border, while 916 was redrawn to include the northeast corner of the state.
As part of this rerouting, Sacramento’s area code was changed from 415 to 916, and Bakersfield’s area code was changed to 213.
In preparation for National Direct Dialing (DDD) in the early 1950s, the 318 area code was temporarily used in the San Francisco area, initially users from Glenwood, New Jersey were involved in the first attempts to reach the city. There are also some areas north of the Golden Gate.
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Due to the rapid economic growth of the Bay Area and the demand for telecommunications services, the 415 area code is divided into three parts:
On February 21, 2015, the numbering plan changed to an area overlap plan, adding the 628 area code to the new numbers in the same service area,
California Area Codes: 209, 213/323, 279/916, 310/424, 341/510, 408/669, 415/628, 442/760, 530, 559, 562, 66 618/70, 66 618 7818. , 5, 86, 5, 6 661, 669, 707, 714, 747, 760, 805, 818, 820, 831, 858, 909, 916, 921, 925, 9
204, 226, 236, 249, 250, 289, 306, 343, 365, 367, 403, 416, 418, 431, 437, 438, 450, 506, 45, 55, 55, 55, 55, 55 , 709, 778, 780, 782, 807, 819, 825, 867, 873, 902, 905
State Officials Approve New 628 Area Code For San Francisco, New Calling Procedure
212, 315, 332, 347, 516, 518, 585, 607, 631, 646, 680, 716, 718, 838, 845, 914, 917, 929, 934
210, 214, 254, 281, 325, 346, 361, 409, 430, 432, 469, 512, 682, 713, 726, 737, 806, 817, 609, 430, 432, 469, 512, 682, 713, 726, 737, 806, 817.
Contrary to what many Americans believe, area codes exist outside the United States. There are 405 area codes in the world: 326 in the US, 42 in Canada, 17 non-geographic and 20 others. Most of the other area codes are located in the Caribbean. However, some in the Pacific are 684 (American Samoa), 671 (Guam) and 670 (Northern Mariana Islands).
California is the state with 34 area codes, followed by Texas (27), New York (19), Florida (17) and Illinois (13). 12 US states have only one area code. While no area code in the US crosses state lines, three area codes in Canada do not cross provincial lines.
All California Area Codes
In the United States and its territories, Canada and the Caribbean, the organization and assignment of telephone numbers is managed by the North American Numbering Plan Administration (NANPA). NANPA manages the assignment of area codes and telephone prefixes to various telephone companies. The basic phone number format in these countries is NPA-NKXX-XXXXX or (NPA) NKXX-XXXXX.
NPA: Area codes came into use in the early 1940s. NPA codes were developed by AT&T and the Bell System to share coverage in “Number Plans” (NPAs for short). NPA codes are commonly referred to as area codes. Although this system was developed in the 40s, direct remote dialing was not used until the early 50s. Some area codes are reserved for special purposes. For example, the 800 area code (commonly referred to as 800 numbers) is reserved for toll-free calls where the caller is billed instead of the caller. Also, all area codes are now obsolete.
NXX: The next three digits of a landline or mobile phone are called NXX. NXX is also known as prefix or conversion. Different telephone operators reserve blocks of telephone numbers by reserving NXX in the area code. Like area codes, not all prefixes are currently in use.
Subscriber: Finally, the last 4 digits of the telephone number are called the subscriber or local number. Based on the total number of reserved active NPA and NXX combinations, each of which can have up to 10,000 potential subscriber numbers, the current total number of telephone numbers is 1,699,140,000. Based on the US Census and the World Bank total population per capita in the US and Canada leaves 4 phone numbers. Note that phone numbers are no longer used for regular home phones. Many phone numbers are now used for fax machines, cell phones or cordless phones, or Internet connections, so a person may need multiple phone lines.
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The 86 area code was created in 1947 by AT&T and the Bell System. They were created to prepare for a unique nationwide long distance dialing system – the ability to call any other calling area without an operator.
The first number cannot be zero (can be confused with an operator) or 1 (technical reasons). The second digit is 0 for an area code that covers the entire country/province or 1 for an area code that covers part of a country/province.
At the time, rotary phones did this so that it took less time to dial smaller numbers like 1 or 2 and longer to dial larger numbers. Area codes with shorter numbers, which are easier to dial, are assigned to areas with a large population and high call volume. For this reason, areas such as New York (212 area code requires 2+1+2=5 impulses), Los Angeles (213 area code requires 2+1+3=6 impulses) and Chicago (312 area code requires 3+ impulses ). ) is 1+ 2=6 pulses), which resulted in area codes that were much faster to dial than in rural areas like South Dakota (the 605 area code required 6+10+5=21 pulses).
Original area codes only exist in the US and Canada. Parts of Canada, Alaska and Hawaii are not yet covered.
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201. 315, 316, 317, 319, 401, 402, 403, 404, 405, 406, 412, 413, 414, 415, 416, 418, 419, 501, 501, 555, 555, 555 4 58, . , 815, 816, 901, 902, 913, 914, 915 and 916
When the telephone formats commonly used today were introduced in the 1940s and 1950s, blocks of telephone numbers of 10,000 telephone numbers (ie, 6 prefixes in total) were assigned to a telephone operator. 10,000 numbers are often enough for a small town, where larger cities are assigned several prefixes. In addition, local telephone operators often monopolize local telephone services, preventing the use of much of the allocated block.
In the 1990s, cell phones became very popular, which created a demand for new phone numbers. Cell phones also reduced the monopoly of local telephone operators, which reduced the use of assigned prefixes. Instead of one main telephone operator, cities have two or more operators – each requiring its own prefix. Additionally, with the growing popularity of the Internet (dial-up and DSL) and voice over IP (VOIP), local ISPs and cable companies have begun to require prefixes. Most of these prefixes have few subscribers.
Over the decades, new area codes have been created by splitting an existing area code into several areas. Generally, a more populated area will continue to use the existing area code. In less populated areas, all existing telephone numbers are reassigned to use the new area code to free up more numbers in the original area code. This process forces many people to dial a new phone number, which requires updating letterheads, business cards, phone books, personal contact lists, etc. Many people dial the wrong area code, which causes confusion.
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In 1992, the 917 area code was created as the first “overlap” area.