The first three bits of the network prefix are set to 110, hence there are 221 (2097152) possible Class C networks; currently around 800000 are defined (40%).
| Last Updated | ||
| 192.0.0.0 - 192.255.255.0 | Various Networks | Aug 1999 |
| 193.0.0.0 - 193.255.255.0 | European Networks | Aug 1999 |
| 194.0.0.0 - 194.255.255.0 | European Networks | Aug 1999 |
| 195.0.0.0 - 195.255.255.0 | European Networks | Aug 1999 |
| 196.0.0.0 - 196.255.255.0 | South Africa/Caribbean Networks | Aug 1999 |
| 197.0.0.0 - 197.255.255.0 | IANA (NETBLK-RESERVED-13) | - |
| 198.0.0.0 - 198.255.255.0 | American Registry for Internet Numbers (NETBLK-ARIN-198) | Aug 1999 |
| 199.0.0.0 - 199.255.255.0 | US/Canadian Networks | Aug 1999 |
| 200.0.0.0 - 200.255.255.0 | South/Central American Networks | Aug 1999 |
| 201.0.0.0 - 201.255.255.0 | IANA (NETBLK-RESERVED-14) - reserved for South/Central American Networks | - |
| 202.0.0.0 - 202.255.255.0 | Asia Pacific Network Information Center (APNIC2) | Aug 1999 |
| 203.0.0.0 - 203.255.255.0 | Asia Pacific Network Information Center (APNIC2) | Aug 1999 |
| 204.0.0.0 - 204.255.255.0 | US/Canadian Networks | Aug 1999 |
| 205.0.0.0 - 205.255.255.0 | US/Canadian Networks | Aug 1999 |
| 206.0.0.0 - 206.255.255.0 | US/Canadian Networks | Aug 1999 |
| 207.0.0.0 - 207.255.255.0 | US/Canadian Networks | Aug 1999 |
| 208.0.0.0 - 208.255.255.0 | US/Canadian Networks | Aug 1999 |
| 209.0.0.0 - 209.255.255.0 | US/Canadian Networks | May 2000 |
| 210.0.0.0 - 210.255.255.0 | Asia Pacific Network Information Center (NETBLK-APNIC-CIDR-BLK) | May 2000 |
| 211.0.0.0 - 211.255.255.0 | Asia Pacific Network Information Center (NETBLK-APNIC-CIDR-BLK) | May 2000 |
| 212.0.0.0 - 212.255.255.0 | European Regional Internet Registry - RIPE NCC (NET-RIPE-NCC-212) | May 2000 |
| 213.0.0.0 - 213.255.255.0 | European Regional Internet Registry - RIPE NCC (NETBLK-213-RIPE) | May 2000 |
| 214.0.0.0 - 214.255.255.0 | DoD Network Information Center, VA (NETBLK-DDN-NIC15) | - |
| 215.0.0.0 - 215.255.255.0 | DoD Network Information Center, VA (NETBLK-DDN-NIC16) | - |
| 216.0.0.0 - 216.255.255.0 | US/Canadian Networks | May 2000 |
| 217.0.0.0 - 223.255.255.0 | Not yet allocated | - |
| 224.0.0.0 - 239.255.255.0 | University of Southern California (NET-MCAST-NET) | - |
| 240.0.0.0 - 255.255.255.0 | Not yet allocated | - |