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List of mobile network codes in the United States : ウィキペディア英語版 | List of mobile network codes in the United States This is a list of Mobile Network Codes (MNC)s in the United States, used by GSM and other wireless networks using the IMSI format to uniquely identify wireless subscribers indifferent of device or phone number. The MNC is the series of digits immediately following the mobile country code, or MCC. For a full list of MCC/MNC combinations worldwide, see the Mobile Network Code page. ==Considerations== Whereas the rest of the world uses two-digit MNCs, the United States nominally uses three-digit MNCs. However, due to this uniqueness, and a lack of support in international networks, carriers which are only uniquely identified via a three-digit MNC are not compatible with international roaming. As a result, in practice, most major US carriers have MNCs ending in 0, so that they are uniquely identified by the first two digits, thereby providing their subscribers with compatibility on international networks. Also, due to expectations in competition and regulation, plus the potential for IMSI use outside of GSM networks (such as in some satellite telephone systems), the US is allocated 7 different MCCs (310-316). As a result, it is theoretically possible for up to 7 different carriers in the U.S. to have the same MNC. However, since not all international networks honor more than one MCC per country, most major providers are within MCC 310 to ensure international compatibility. Furthermore, the GSMNA, which allocates MNCs, has attempted to ensure that MNCs do not overlap anywhere within North America (telephone country code 1) -- see Global Title.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「List of mobile network codes in the United States」の詳細全文を読む
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