| Navaid Facility ID: | CIR |
| Official Navaid Facility ID: | CIR |
| Navaid Facility Type: | NDB |
| Navaid Name: | Cairo |
| City: | CAIRO |
| State: | ILLINOIS |
| FAA Region: | |
| Latitude: | 37-03-39.955N (37.0611) |
| Longitude: | 089-13-23.442W (-89.2232) |
| Lat/Long Survey Accuracy: | 1 second or better |
| Owner: | ALEXANDER COUNTY ARPT ALTH |
| Operator: | ALEXANDER COUNTY ARPT ALTH |
| Common System Usage: | Yes |
| Public Use: | Yes |
| Navaid Class: | MHW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 2.6 W as of 9/30/2025 |
| ARTCC High Altitude ID (Name): | ZME (MEMPHIS) |
| ARTCC Low Altitude ID (Name): | ZME (MEMPHIS) |