| Navaid Facility ID: | RPX |
| Official Navaid Facility ID: | RPX |
| Navaid Facility Type: | NDB |
| Navaid Name: | Roundup |
| City: | ROUNDUP |
| State: | MONTANA |
| FAA Region: | |
| Latitude: | 46-28-16.052N (46.4711) |
| Longitude: | 108-33-04.726W (-108.5513) |
| Lat/Long Survey Accuracy: | |
| Owner: | STATE OF MONTANA |
| Operator: | STATE OF MONTANA |
| Common System Usage: | No |
| Public Use: | Yes |
| Navaid Class: | MHW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 10.2 E as of 9/30/2025 |
| ARTCC High Altitude ID (Name): | ZLC (SALT LAKE CITY) |
| ARTCC Low Altitude ID (Name): | ZLC (SALT LAKE CITY) |
| Navaid ID | Navaid Facility Type | Remarks |
|---|---|---|
| RPX | NDB | 3RD PARTY SURVEY |