AT&T Services, Inc. ATT (NET-12-0-0-0-1) 12.0.0.0 - 12.255.255.255 AT&T Services, Inc. ATTWORLD49 (NET-12-227-0-0-1) 12.227.0.0 - 12.227.255.255 ACC-ABLE FREIGHT SERVICES ACC-ABLE46-162-224 (NET-12-227-162-224-1) 12.227.162.224 - 12.227.162.255