AT&T Services, Inc. ATT (NET-12-0-0-0-1) 12.0.0.0 - 12.255.255.255 AT&T Services, Inc. ATTSVCM-12-147-24-0 (NET-12-147-24-0-1) 12.147.24.0 - 12.147.31.255 ACC-GUY ST AMANT INTERNET SER ACC-GUY-23-30 (NET-12-147-30-0-1) 12.147.30.0 - 12.147.31.255