i just heard Cobra 55 working San Francisco radio. San Francisco gave them a VHF frequency for Pappa Alpha Zulu November. not long after this i heard Reach 485 with a position report. i looked up Cobra 55 and it appears to be a USAF WC-135W "Nuke Spotter" aircraft. i googled Reach 485 and didn't come up with anything other than Reach is a callsign for Military Airlift Command aircraft.