The big red numbers are fairly well known. They denote your membership number in the Wally Byam Caravan Club International (WBCCI). The blue numbers denote my membership number in the Airstream Forums (actually called AirForums now). In my personal opinion, AirForums may take over as the ‘official’ gathering and contact point for many new Airstreamers. This must be what has garnered the change to AirForums, to possibly avoid any future litigation.