The area code indicates the regional location of the phone number. According to NANP, there are 405 area codes in North America.
Of these, 326 are in the US, 42 are in Canada, 17 are non-geographic virtual number, and 20 are others(mostly Caribbean).
The number of area codes is different for each area, in the future, the area with the most phone number users will have more area codes.
406 is one of the Area Codes.
Lookup area code 406 regional location
State: MontanaRegion: Montana
Center City: Billings, Bozeman, Helena
State & Region & County & City & Location map with Area Code
Too many area codes, map size limit, all area codes may not be displayed, only major area codes.
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406 is only the first 3-digit of the phone number, it can only lookup the regional location.
The full phone number is 10-digit, 406-xxx-yyyy, 406 is the area code, xxx is the Central Office, the Exchange Code, and yyyy is the subscriber number.
The list is 406-xxx all Central Office Exchange Code phone numbers.
406007 406002 406005 406009 406000 406003 406008 406004 406001 406006 406017 406012 406015 406019 406010 406013 406018 406014 406011 406016 406027 406022 406025 406029 406020 406023 406028 406024 406021 406026 406037 406032 406035 406039 406030 406033 406038 406034 406031 406036 406047 406042 406045 406049 406040 406043 406048 406044 406041 406046 406057 406052 406055 406059 406050 406053 406058 406054 406051 406056 406067 406062 406065 406069 406060 406063 406068 406064 406061 406066 406077 406072 406075 406079 406070 406073 406078 406074 406071 406076 406087 406082 406085 406089 406080 406083 406088 406084 406081 406086 406097 406092 406095 406099 406090 406093 406098 406094 406091 406096 406107 406102 406105 406109 406100 406103 406108 406104 406101 406106 406117 406112 406115 406119 406110 406113 406118 406114 406111 406116 406127 406122 406125 406129 406120 406123 406128 406124 406121 406126 406137 406132 406135 406139 406130 406133 406138 406134 406131 406136 406147 406142 406145 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