199.176.0.0 - 199.179.255.255 Ameritech Advanced Data Services, Inc. (NETBLK-AADSNET-CIDR) 199.177.3.0 - 199.177.3.255 Office of Catholic Education (NETBLK-AIMS-OCE-BLK) 199.177.64.0 - 199.177.191.255 Merit Network Inc. (NETBLK-AADS-BLK-MERIT-C2) 199.177.192.0 - 199.177.255.255 IQuest Network Services (NETBLK-AADS-BLK-IQUEST-C1)