🔎 Tip: Click any Company, OCN, Rate Center, or CLLI to explore related telecom data
| npa-nxx | State | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 406-267 | MT | SOUTHERN MONTANA TEL. CO. | 0001648039 | RMD0002281 | 2254 | DIVIDE | WSDMMTXCDS0 | 00/00/0000 | Prefix Type: ICO Switch Name: WISDOM Switch Type: Northern Telecom DMS10 (Digital) LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: WSDMMTXCDS0)) |
| 406-553 | MT | NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless) | 0003291192 | RMD0036909 | 6010 | DIVIDE | MSSLMTAG5MD | 00/00/0000 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTAG5MD)) |
| 406-553 is split into 1,000-number blocks - detail below | |||||||||
| 406-553-3XXX | MT | TERRA NOVA TELECOM INC. | 0021193057 | RMD0001495 | 145J | DIVIDE | NOCLLIKNOWN | 09/15/2025 | Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |