Local Calling Guide
Area code/prefix search
NPA: 406
[Rate centres in NPA 406]
[Dial plan for NPA 406]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-686
| 2 |
Clyde Park |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2011-01-10 |
|
| 406-686
| 3 |
Clyde Park |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2011-04-10 |
|
| 406-686
| 4 |
Clyde Park |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-686
| 5 |
Clyde Park |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2024-03-15 |
|
| 406-686
| 6 |
Clyde Park |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2009-02-13 |
|
| 406-686
| 7 |
Clyde Park |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2007-04-14 |
|
| 406-686
| 8 |
Clyde Park |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-10-20 |
|
| 406-686
| 9 |
Clyde Park |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-687
| A |
West Glendive |
MT |
WGLNMTXCDS2 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-687
| 0 |
West Glendive |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2025-02-03 |
|
| 406-687
| 1 |
West Glendive |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-687
| 2 |
West Glendive |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2025-05-29 |
|
| 406-687
| 3 |
West Glendive |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-687
| 4 |
West Glendive |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2025-05-29 |
|
| 406-687
| 7 |
West Glendive |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-687
| 8 |
West Glendive |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-687
| 9 |
West Glendive |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-688
| A |
Scobey |
MT |
|
443B SAGEBRUSH CELLULAR, INC. |
650 |
|
|
|
| 406-688
| 6 |
Scobey |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2025-08-29 |
|
| 406-688
| 8 |
Scobey |
MT |
|
443B SAGEBRUSH CELLULAR, INC. |
650 |
|
2014-04-01 |
|
| 406-688
| 9 |
Scobey |
MT |
|
443B SAGEBRUSH CELLULAR, INC. |
650 |
|
2014-04-01 |
|
| 406-689
| A |
Wisdom |
MT |
WSDMMTXCDS0 |
2254 SOUTHERN MONTANA TEL. CO. |
648 |
|
|
|
| 406-690
| A |
Billings |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-691
| A |
Anaconda |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-691
| 0 |
Anaconda |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-691
| 4 |
Anaconda |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2019-08-09 |
|
| 406-691
| 7 |
Anaconda |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-05-24 |
|
| 406-691
| 8 |
Anaconda |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-07-18 |
|
| 406-691
| 9 |
Anaconda |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2015-08-10 |
|
| 406-692
| A |
Yellow Bay |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-692
| 0 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-692
| 1 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-692
| 2 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-692
| 3 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-692
| 4 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-692
| 5 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-692
| 6 |
Yellow Bay |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2014-06-27 |
|
| 406-692
| 7 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2007-12-06 |
|
| 406-692
| 8 |
Yellow Bay |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2011-03-05 |
|
| 406-692
| 9 |
Yellow Bay |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-693
| A |
Warm Springs |
MT |
WRSPMTMARS1 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-693
| 0 |
Warm Springs |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-03-07 |
|
| 406-693
| 1 |
Warm Springs |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2007-03-19 |
|
| 406-693
| 2 |
Warm Springs |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-693
| 3 |
Warm Springs |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-693
| 4 |
Warm Springs |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-693
| 5 |
Warm Springs |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2025-02-03 |
|
| 406-693
| 6 |
Warm Springs |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-693
| 7 |
Warm Springs |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-693
| 8 |
Warm Springs |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2011-10-24 |
|
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 >>
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
Sponsored by: VoIP.ms
Like this site? We accept donations via PayPal.