| AreaCode | 406 |
| Prefix | 344 |
| State | MT - Montana |
| Telco Company Name | Triangle Communication System, |
| Operating Company Number (OCN) | 893H |
| RateCenter | HAVRE |
| Common Language Location Identifier Code (CLLI) | NOCLLIKNOWN |
| Prefix Type | UNKNOWN |
| Local access and transport area (LATA) | 648 |