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本帖最後由 Julekha461 於 2023-7-18 13:13 編輯
A switch code, also known as a country code or international dialing code, is the first digit or group of digits in a telephone number that identifies the country or region in which the phone is located. Switch codes are used to route international calls so that they reach the correct destination.
The switch code for North America is 1, for South America is 5, for Europe is 3, for Asia is 8, for Africa is 2, and for Oceania is 6. There are also switch codes for specific Photo Editor Service Price countries or regions, such as 44 for the United Kingdom, 61 for Australia, and 81 for Japan.
Switch codes are used in conjunction with the rest of the phone number to uniquely identify a particular phone line. For example, the phone number 1-212-555-1212 is a North American phone number because it starts with the switch code 1. The rest of the phone number, 212-555-1212, identifies a specific phone line in New York City.
Switch codes are an important part of the international telephone system. They allow calls to be routed correctly and efficiently, regardless of where the caller and callee are located.
In addition to their primary purpose of routing calls, switch codes can also be used for other purposes. For example, some countries use switch codes to identify specific types of phone numbers, such as toll-free numbers or emergency numbers.
Switch codes are also used in some cases to identify specific carriers or service providers. For example, in the United States, the switch code 700 is used for calls to premium-rate numbers.
While switch codes are an important part of the international telephone system, they can also be used for less legitimate purposes. For example, some people use switch codes to scam or defraud others.
Overall, switch codes are a valuable tool that allows people to make and receive international calls. However, it is important to be aware of the potential for misuse of switch codes.
The first switch codes were introduced in the early 1960s.
The International Telecommunication Union (ITU) is responsible for assigning switch codes.
There are currently over 250 different switch codes in use.
Switch codes are typically two digits long, but some countries use longer codes.
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