192.255.103.x

I'm trying to diagnose an issue with 192.255.103.x As far as I can tell from IANA, the block 192/8 is allocated to ARIN. ARIN does not have a record of 192.255.103 being allocated to anybody. Here is the issue ... the customer insists that is the correct IP and for a few hours yesterday, it was actually working. Their satellite phone can reach it, but we can't see it advertised today from any networks. The ip block 192.255.0.0/16 is allocated to "VARIOUS RIRs" under a text file I found at potaroo.net I tried a few looking glass sites, but I still can't find a route to the advertising router. So ... any ideas how to go about finding out the source of the routing block? -- Hector Herrera