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Northern Mariana Islands (NN) Area Code 670 Active Prefix Listing
State
Prefixes
Northern Mariana Islands (NN)
211
233
234
235
236
237
256
285
286
287
288
311
321
322
323
328
411
433
483
484
488
511
532
555
588
611
664
670
682
700
711
783
785
788
789
811
838
848
858
868
878
888
898
911
950
958
959
976
989
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