You can monitor Mir communications on 143.625 MHz with a scanner radio. The Mir Space Station also carries FM Amateur Radio equipment. Licensed radio amateurs can make voice contacts with the Mir crew on the 2 meter VHF band. The downlink frequency is 145.800 MHz and the uplink frequency is 145.200 MHz. The Mir crew may, alternatively, operate over North America on 145.985 MHz simplex. Licensed radio amateurs can also make 70 cm UHF voice contacts with the Mir crew via the "SAFEX" equipment. The downlink frequency is 437.950 MHz and the uplink frequency is 435.750 MHz with a 151.4 Hz CTCSS.
The Mir SAFEX equipment also has a 70 cm UHF amateur repeater. The SAFEX repeater relays voice signals between ground stations in the Mir's 4400 km (2800 mi) wide footprint. The SAFEX downlink frequency is 437.950 MHz and the uplink frequency is 435.750 MHz with a 141.3 Hz CTCSS.
Note: Because of the relatively high frequencies for SAFEX, both the downlink and uplink frequencies experience +/- 10 kHz of Doppler shift.
The Joint U.S./Russian Shuttle-Mir Program is a precursor to the International Space Station (ISS). Information is available on the Shuttle-Mir Web page. ISS information is also available on the International Space Station Web page.