| AreaCode | 406 |
| Prefix | 351 |
| City | Billings |
| State | MT - Montana |
| Telco Company Name | Eltopia Communications, Llc - |
| Operating Company Number (OCN) | 921F |
| RateCenter | FORSYTH |
| Common Language Location Identifier Code (CLLI) | NOCLLIKNOWN |
| Prefix Type | CLEC |
| Local access and transport area (LATA) | 650 |