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 98 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-434
| 9 |
Shelby |
MT |
SHLBMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-435
| A |
Billings |
MT |
|
520K TDS METROCOM, LLC |
650 |
|
|
|
| 406-435
| 0 |
Billings |
MT |
|
520K TDS METROCOM, LLC |
650 |
|
2025-12-06 |
|
| 406-435
| 1 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 2 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 3 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 4 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 5 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 6 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 7 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 8 |
Billings |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 9 |
Billings |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2021-04-22 |
|
| 406-436
| A |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 0 |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 2 |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 5 |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 8 |
Broadus |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2026-05-09 |
|
| 406-436
| 9 |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-437
| A |
Helena |
MT |
HLNAMTMAMMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
|
|
| 406-437
| 0 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2023-09-28 |
|
| 406-437
| 1 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-04-09 |
|
| 406-437
| 2 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-07-06 |
|
| 406-437
| 3 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-09-14 |
|
| 406-437
| 4 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2011-04-04 |
|
| 406-437
| 5 |
Helena |
MT |
HLNAMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
2008-08-13 |
|
| 406-437
| 6 |
Helena |
MT |
HLNAMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
2008-08-13 |
|
| 406-437
| 7 |
Helena |
MT |
HLNAMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
2008-08-13 |
|
| 406-437
| 8 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2011-07-08 |
|
| 406-437
| 9 |
Helena |
MT |
HLNAMTMAMMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2004-09-19 |
|
| 406-438
| A |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-438
| 0 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2022-12-10 |
|
| 406-438
| 1 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-10-22 |
|
| 406-438
| 2 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-10-22 |
|
| 406-438
| 3 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-11-23 |
|
| 406-438
| 4 |
Helena |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-04-01 |
|
| 406-438
| 5 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2010-07-14 |
|
| 406-438
| 6 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2010-10-11 |
|
| 406-438
| 7 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2011-02-06 |
|
| 406-438
| 8 |
Helena |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2023-12-09 |
|
| 406-438
| 9 |
Helena |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2023-12-09 |
|
| 406-439
| A |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 0 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 1 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 2 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 3 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 4 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 5 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 6 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 7 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-439
| 8 |
Helena |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
<< 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 98 >>
Last updated: Sun, 17 May 2026 03:26:51 UTC
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