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SIM) whileE.214 is used for routing database queries acrossPSTN networks.Country code Country code - necessary only when dialing to phones in other countries. In international usage,telephone numbers are quoted with the country code preceded by a "+",and with spaces in place of hyphens (e.g.,"+XX YYY ZZZ ZZZZ"). This allows the reader to choose which Access Code (also known as International Dialing Digit) they need to dial from their location. However,it is often quoted together with the international access code which must precede it in the dial string,especially in the United States and Canada (e.g.,"011-XX-YYY-ZZZ-ZZZZ"). This can cause confusion as "011" may not be a valid Access Code where the reader is located. OnGSM networks,"+" is an actual character that may be used internally as the international access code,rather than simply being a convention. Area code Area codes are also known as Numbering Plan Areas (NPAs). These are necessary (for the most part) only when dialed from outside the code area,from mobile phones,and (especially within North America) from withinoverlay plans. Area codes usually indicate geographical areas within one country that are covered by perhaps hundreds of telephone exchanges,although the correlation to geographical area is becoming obsolete.[ 2 - It must usually be preceded in the dial string by either the national access code or the international access code and country code. For non-geographical numbers,as well as mobile telephones outside of the United States and Canada,the "area code" does not correlate to a particular geographic area. Area codes were introduced in the United States by theBell System,in 1951,with the first direct dial long distance call.[ 3 - Local number The local number (or subscriber number) must always be dialed in its entirety. The first few digits in the local number typically indicate smaller geographical areas or individualtelephone exchanges. In mobile networks they may indicate a network provider in case the area code does not. Callers from a number with a given area/country code usually do not need to (but optionally may) include the particular area/country code in the number dialed,which enables shorter "dial strings" to be used. Devices that dial phone numbers automatically can include the full number with area and access codes,since there is no additional annoyance related to dialing extra digits.

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Globe icon. E 214 - Phone Number Plan - England Phones
E 214 - Phone Number Plan - England Phones
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