The Mojave phone booth was a lone telephone booth in what is now the Mojave National Preserve in California, which attracted online attention in 1997 for its unusual location. Installed in the 1960s, the booth was eight miles (13 km) from the nearest paved road, fifteen miles (24 km) from the nearest numbered highway, and miles from any buildings. Its telephone number was originally (714) 733-9969 before the area code changed to 619 and then to 760.[1]
IRC over SMS was added for Defcon 22 and is currently still working as well, one can send an SMS with SUBSCRIBE ALIAS to 760-733-9969 to join the group SMS chat.