Billings city phone area codes
406-206
406-208
406-215
406-237
406-238
406-245
406-247
406-248
406-252
406-254
406-255
406-256
406-259
406-272
406-281
406-294
406-325
406-371
406-373
406-384
406-435
406-534
406-545
406-591
406-598
406-620
406-633
406-651
406-652
406-655
406-656
406-657
406-661
406-670
406-671
406-672
406-679
406-690
406-694
406-696
406-697
406-698
406-749
406-788
406-794
406-839
406-850
406-855
406-860
406-861
406-867
406-869
406-894
406-896
417-258
417-289
417-369
417-463
417-583
417-695
417-732
417-743
417-744
417-748
580-391
580-422
580-725