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.
503 is one of the Area Codes.
Lookup area code 503 regional location
State: OregonRegion: Oregon
Center City: Beaver, Gresham, Portland
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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503 is only the first 3-digit of the phone number, it can only lookup the regional location.
The full phone number is 10-digit, 503-xxx-yyyy, 503 is the area code, xxx is the Central Office, the Exchange Code, and yyyy is the subscriber number.
The list is 503-xxx all Central Office Exchange Code phone numbers.
503007 503002 503005 503009 503000 503003 503008 503004 503001 503006 503017 503012 503015 503019 503010 503013 503018 503014 503011 503016 503027 503022 503025 503029 503020 503023 503028 503024 503021 503026 503037 503032 503035 503039 503030 503033 503038 503034 503031 503036 503047 503042 503045 503049 503040 503043 503048 503044 503041 503046 503057 503052 503055 503059 503050 503053 503058 503054 503051 503056 503067 503062 503065 503069 503060 503063 503068 503064 503061 503066 503077 503072 503075 503079 503070 503073 503078 503074 503071 503076 503087 503082 503085 503089 503080 503083 503088 503084 503081 503086 503097 503092 503095 503099 503090 503093 503098 503094 503091 503096 503107 503102 503105 503109 503100 503103 503108 503104 503101 503106 503117 503112 503115 503119 503110 503113 503118 503114 503111 503116 503127 503122 503125 503129 503120 503123 503128 503124 503121 503126 503137 503132 503135 503139 503130 503133 503138 503134 503131 503136 503147 503142 503145 503149 503140 503143 503148 503144 503141 503146 503157 503152 503155 503159 503150 503153 503158 503154 503151 503156 503167 503162 503165 503169 503160 503163 503168 503164 503161 503166 503177 503172 503175 503179 503170 503173 503178 503174 503171 503176 503187 503182 503185 503189 503180 503183 503188 503184 503181 503186 503197 503192 503195 503199 503190 503193 503198 503194 503191 503196 503207 503202 503205 503209 503200 503203 503208 503204 503201 503206 503217 503212 503215 503219 503210 503213 503218 503214 503211 503216 503227 503222 503225 503229 503220 503223 503228 503224 503221 503226 503237 503232 503235 503239 503230 503233 503238 503234 503231 503236 503247 503242 503245 503249 503240 503243 503248 503244 503241 503246 503257 503252 503255 503259 503250 503253 503258 503254 503251 503256 503267 503262 503265 503269 503260 503263 503268 503264 503261 503266 503277 503272 503275 503279 503270 503273 503278 503274 503271 503276 503287 503282 503285 503289 503280 503283 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