Public regulatory phone

(406) 497-1000

Associations below come from public FCC regulatory records. Confidence describes the source relationship, not current ownership of the number.

Company or contact	FRN	System	Source record	Confidence	Observed
NorthWestern Corporation owner	0012478665	ASR	79a850646323eab4a9aa7c2ae8a6fb999d2cde0dd9efbd29fa81ac398a524c42	Authoritative identifier (100.0%)	2026-08-07 02:48:35
NorthWestern Corporation owner	0012478665	ASR	779d7ca9dff7e7a3ca15823aa61cc2fee11e36bd4c42db28e47dee3b482024a5	Authoritative identifier (100.0%)	2026-08-07 00:18:37
NorthWestern Corporation owner	0012478665	ASR	7526018278d1ca66e68587864b583fb4ad0fd0f09e69da48391a1a01f76571d4	Authoritative identifier (100.0%)	2026-08-06 19:18:33
NorthWestern Corporation owner	0012478665	ASR	752fb3bae1ea122d3b3a6e715d1b59395ff294713c81d1121bfe0c9053a7bf19	Authoritative identifier (100.0%)	2026-08-06 19:18:33
NorthWestern Corporation owner	0012478665	ASR	7436925cb4157c47af9aeb4ae11b7a04dfbc3a34dd08c22828e7ecb1459565cf	Authoritative identifier (100.0%)	2026-08-06 18:18:34
NorthWestern Corporation owner	0012478665	ASR	704fe8644a2229075e7b8d4caaeeaad647f4f3c3cea2ca5bc09cfa922879b754	Authoritative identifier (100.0%)	2026-08-06 13:48:34
NorthWestern Corporation owner	0012478665	ASR	6fe7e75786ceea785ad8ae86087984c1734b76a8d00965fbf357de03457a1d9b	Authoritative identifier (100.0%)	2026-08-06 12:48:35
NorthWestern Corporation owner	0012478665	ASR	6eb9bd69197f38cc991151b65890c9ccf48627da8f874185bd3b6b1536aa34fc	Authoritative identifier (100.0%)	2026-08-06 11:18:33
NorthWestern Corporation owner	0012478665	ASR	6b79dda39497b3b1e130a26c387615928dedbea3103f69e21e7e45059c73d765	Authoritative identifier (100.0%)	2026-08-06 08:48:31
NorthWestern Corporation owner	0012478665	ASR	65831096c4688f8cb754598a11f2fc8cd8ebe83dab7ea02af4fe4b565265aeb5	Authoritative identifier (100.0%)	2026-08-06 00:48:29
NorthWestern Corporation owner	0012478665	ASR	61c7a81136a5dfa9a5451acb34178fff7b76a29dc963ee384a87ad89bb2715d4	Authoritative identifier (100.0%)	2026-08-05 19:48:29
NorthWestern Corporation owner	0012478665	ASR	5cf464e9c8e43942b7d627b1be79599902a3635e90752bcab29ef3e810f2763f	Authoritative identifier (100.0%)	2026-08-05 14:48:30
NorthWestern Corporation L	0012478665	ULS	0308af04c4d133b35babd17c5febf7a9029b6f86b104e3feb62654bcb192a1d4	Authoritative identifier (100.0%)	2026-08-05 13:48:32
NorthWestern Corporation owner	0012478665	ASR	5a3d01725a82bd75140942750535313cefce1b6c7326a015f403f72b9e6c2e4d	Authoritative identifier (100.0%)	2026-08-05 12:18:28
NorthWestern Corporation L	0012478665	ULS	02ce25a3229ad2332cc10617b39ad659e17d8e5c2f2a90d4843484d667021b91	Authoritative identifier (100.0%)	2026-08-05 08:18:32
NorthWestern Corporation owner	0012478665	ASR	545f1728ed49ad5fafbce38db0a448071e772e2b5c2fe219a666cb9de0d622b5	Authoritative identifier (100.0%)	2026-08-05 06:48:26
NorthWestern Corporation owner	0012478665	ASR	51769dfd8b52d0ede5a23bfeb34d9b2d8963ab9ff61f81e9a9435815720ce0bb	Authoritative identifier (100.0%)	2026-08-05 04:18:25
NorthWestern Corporation L	0012478665	ULS	029f5f03f0b648bb1a0ca4ae80fc617a815918729fd78467b59676485b840553	Authoritative identifier (100.0%)	2026-08-05 03:48:29
NorthWestern Corporation L	0012478665	ULS	029849ad3e14490942711f9c43a2b88711044c28889a01b2b69f724e1778155f	Authoritative identifier (100.0%)	2026-08-05 02:48:30
NorthWestern Corporation owner	0012478665	ASR	4eeb7afd06f600c7b504ef332b8bb0b223e8b08a4a2adfc12811cf3800fa6722	Authoritative identifier (100.0%)	2026-08-05 00:18:26
NorthWestern Corporation L	0012478665	ULS	027dfdbd18d2944bb48a6927e3b29d44f038c262fffc57cc8ba298a62496778b	Authoritative identifier (100.0%)	2026-08-04 23:18:30
NorthWestern Corporation owner	0012478665	ASR	4c59ac5e9d7bd4ec9bdd5ee207b7162b22222f8878bc498a718331778a92f901	Authoritative identifier (100.0%)	2026-08-04 21:48:25
NorthWestern Corporation owner	0012478665	ASR	4441fa2d317e4b849b373c7a0f1b48080629f4a3d7144fb80a5ac8b2db2d8c36	Authoritative identifier (100.0%)	2026-08-04 10:18:25
NorthWestern Corporation owner	0012478665	ASR	44567201a2f2c9ef30382bc0d74e7e616b769b4e3b54a1de3d940e984b137ab4	Authoritative identifier (100.0%)	2026-08-04 10:18:25
NorthWestern Corporation L	0012478665	ULS	01f8880a3a3e264b3634dd6157566a06f20687ebb9c8eece26145c6512c09bef	Authoritative identifier (100.0%)	2026-08-04 04:48:26
NorthWestern Corporation owner	0012478665	ASR	3d7c824d708468cbfea461d9b74f54cfd77c6eed997ca10281735c9e602c0e6d	Authoritative identifier (100.0%)	2026-08-04 01:18:20
NorthWestern Corporation owner	0012478665	ASR	3d384bcef1708143ac0d7d254694c97dfef36cabfe8d845a86514e377fa0e04d	Authoritative identifier (100.0%)	2026-08-04 00:48:23
NorthWestern Corporation L	0012478665	ULS	0183cc427c776c8bc813c3cf019b495102ae2cd55cf5dfcfb69f166c2bb76aef	Authoritative identifier (100.0%)	2026-08-03 12:18:24
NorthWestern Corporation owner	0012478665	ASR	317348e38f06e016c3eed9267fa6cb6cb8726c74799006c0e72803c88570711c	Authoritative identifier (100.0%)	2026-08-03 08:18:23
NorthWestern Corporation owner	0012478665	ASR	2dc90565fdcf5bc2fd6aab35e7a240e2eb2938060bb85c2b4ff5a639b86067ba	Authoritative identifier (100.0%)	2026-08-03 02:18:21
NorthWestern Corporation L	0012478665	ULS	01236ef3288966a998966461cc8265aab388b8f0ca2cf57cf7db237988b77802	Authoritative identifier (100.0%)	2026-08-02 20:18:25
NorthWestern Corporation owner	0012478665	ASR	24deb1e31ae09ecac1e0cea53c4e96d348f6a655f01a12695a44f6353e2f6902	Authoritative identifier (100.0%)	2026-08-02 07:48:17
NorthWestern Corporation owner	0012478665	ASR	2159617357d495202faee082804b8b2ae24e51fa7426aa7c288ef28861181e23	Authoritative identifier (100.0%)	2026-08-02 04:18:15
NorthWestern Corporation owner	0012478665	ASR	1eef3f9406cf6a22fac7b78967ac983721f0dc00663d88083e20f9e976d4a2b4	Authoritative identifier (100.0%)	2026-08-02 00:18:15
NorthWestern Corporation owner	0012478665	ASR	1cab3a86d0d494928cdb06559f333f859ee51a0d967c69da9e08c57e524a4f76	Authoritative identifier (100.0%)	2026-08-01 22:18:15
NorthWestern Corporation owner	0012478665	ASR	137a29468dfb7e4019bb552355cdb65a0dcdecf48228b8eb4bd7ef940e6ca544	Authoritative identifier (100.0%)	2026-08-01 13:48:12
NorthWestern Corporation owner	0012478665	ASR	10842fc2bc0c6ac669b053182da230fd7535f53edc87b811ad50b06e94bb5acd	Authoritative identifier (100.0%)	2026-08-01 10:18:13
NorthWestern Corporation owner	0012478665	ASR	0e99196e7bacaeee410327dd3f6656efd585994378877c6785f4e596d062f699	Authoritative identifier (100.0%)	2026-08-01 07:18:14
NorthWestern Corporation L	0012478665	ULS	005905c50037bbf18525aa5c7b3a0739955c03e937fae3b1c2c7f74b71cc5779	Authoritative identifier (100.0%)	2026-08-01 06:18:13
NorthWestern Corporation owner	0012478665	ASR	0c29daa1a0ce949fa3f0402f0c77c3a8631b097b530112af7cea9c9649c9e1e8	Authoritative identifier (100.0%)	2026-08-01 06:18:11
NorthWestern Corporation owner	0012478665	ASR	02764167b2488344013cbd5d8a173aa49e8e0c867d014e3084658fb7360b9eed	Authoritative identifier (100.0%)	2026-07-31 19:09:47