| 204.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 204.180.0.0/14 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.180.0.0/14 | WHOIS (ARIN) | Cogent Communications, LLC | US |
| 204.180.0.0/14 | ARIN assigned | — | US |
| 204.181.192.0/18 | WHOIS (ARIN) | RCN | US |
| 204.182.64.0/18 | WHOIS (ARIN) | RCN | US |
| 204.183.0.0/18 | WHOIS (ARIN) | RCN | US |
| 204.180.0.0/20 | BGP route | AS36549 WestTel Ltd. | — |
| 204.180.0.0/20 | WHOIS (ARIN) | WestTel Ltd. | KY |
| 204.181.192.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.181.208.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.181.224.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.181.240.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.182.64.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.182.80.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.182.96.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.182.112.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.182.128.0/20 | WHOIS (ARIN) | SAVVIS COMMUNICATIONS | US |
| 204.182.144.0/20 | WHOIS (ARIN) | Microsoft Corporation | US |
| 204.182.160.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.183.0.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.183.16.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.183.32.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.183.48.0/20 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.183.80.0/20 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.176.0/20 | WHOIS (ARIN) | Point Blank Ltd. | US |
| 204.180.232.0/21 | BGP route | AS32068 | — |
| 204.181.0.0/21 | BGP route | AS32068 | — |
| 204.181.0.0/21 | WHOIS (ARIN) | Memphis Networx | — |
| 204.181.152.0/21 | BGP route | AS3364 Computer Systems Design Company | — |
| 204.181.152.0/21 | WHOIS (ARIN) | Computer Systems Design Company | US |
| 204.182.232.0/21 | WHOIS (ARIN) | ViaSat, Inc. | US |
| 204.180.236.0/22 | WHOIS (ARIN) | PEABODY OFFICE TOWER | US |
| 204.181.52.0/22 | BGP route | AS27696 LIBERTY NETWORKS HONDURAS, SOCIEDAD DE RESPONSABILIDAD LIMITADA | — |
| 204.181.52.0/22 | WHOIS (ARIN) | TELECORP | HN |
| 204.183.220.0/22 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.220.0/22 | WHOIS (ARIN) | CHAMBERLAIN | US |
| 204.180.64.0/23 | WHOIS (ARIN) | Aeris | US |
| 204.183.112.0/23 | WHOIS (ARIN) | Point Blank Ltd. | US |
| 204.180.64.0/24 | BGP route | AS17043 Aeris Communications, Inc. | — |
| 204.180.73.0/24 | WHOIS (ARIN) | VF Services, Inc. Information Technology Services | US |
| 204.180.130.0/24 | BGP route | AS53866 Omeda Communications | — |
| 204.180.130.0/24 | WHOIS (ARIN) | Omeda Communications | US |
| 204.180.133.0/24 | BGP route | AS14162 FEDERAL HOME LOAN BANK of PITTSBURGH | — |
| 204.180.133.0/24 | WHOIS (ARIN) | FEDERAL HOME LOAN BANK of PITTSBURGH | US |
| 204.180.153.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.180.153.0/24 | WHOIS (ARIN) | SonicWall | US |
| 204.180.228.0/24 | BGP route | AS200946 EMC Information Systems International PUC | — |
| 204.180.232.0/24 | WHOIS (ARIN) | ACCESS INTEGRATED NETWORKS | US |
| 204.180.234.0/24 | WHOIS (ARIN) | BELZ INVESTCO GP | US |
| 204.180.235.0/24 | BGP route | AS32068 | — |
| 204.181.1.0/24 | BGP route | AS32068 | — |
| 204.181.1.0/24 | WHOIS (ARIN) | V02 NETWORX | US |
| 204.181.2.0/24 | WHOIS (ARIN) | Perspective, Inc. | US |
| 204.181.3.0/24 | WHOIS (ARIN) | UNIVERSITY OF TENNESSEE MEDICAL CENTER | US |
| 204.181.4.0/24 | WHOIS (ARIN) | MANAGED HOSTING SOLUTIONS | US |
| 204.181.5.0/24 | WHOIS (ARIN) | INFORMED MEDICAL NETWORKS | US |
| 204.181.7.0/24 | WHOIS (ARIN) | Perspective, Inc. | US |
| 204.181.34.0/24 | WHOIS (ARIN) | VF Services, Inc. Information Technology Services | US |
| 204.182.161.0/24 | BGP route | AS32261 SUBSPACE | — |
| 204.182.232.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.233.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.234.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.235.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.236.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.237.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.238.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.182.239.0/24 | BGP route | AS46536 ViaSat, Inc. | — |
| 204.183.80.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.81.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.82.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.83.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.84.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.85.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.86.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.87.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.88.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.89.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.90.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.91.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.92.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.183.116.0/24 | WHOIS (ARIN) | BRYAN MUNICIPAL UTILITIES | US |
| 204.183.124.0/24 | WHOIS (ARIN) | AKAMAI TECHNOLOGIES, INC | US |
| 204.180.72.0/25 | WHOIS (ARIN) | AKAMAI TECHNOLOGIES, INC | US |
| 204.181.181.128/25 | WHOIS (ARIN) | POPULAR CASH EXPRESS | US |
| 204.180.72.192/26 | WHOIS (ARIN) | Dyno Nobel Inc. | US |
| 204.181.6.192/26 | WHOIS (ARIN) | COMPUTERS AND NETWORKS LLC | US |
| 204.181.64.64/26 | WHOIS (ARIN) | Discover Financial Services | US |
| 204.182.59.0/26 | WHOIS (ARIN) | Sun Capital Partners | US |
| 204.180.196.0/27 | WHOIS (ARIN) | GOSS GRAPHIC SYSTEMS INC | US |
| 204.180.196.160/27 | WHOIS (ARIN) | Intertel/Bailey, Crow & Kugler | US |
| 204.180.235.0/27 | WHOIS (ARIN) | DSMART TECHNOLOGIES LLC | US |
| 204.181.0.160/27 | WHOIS (ARIN) | ODEN MARKETING AND DESIGN | US |
| 204.181.0.192/27 | WHOIS (ARIN) | SHELBY COUNTY GOVERNMENT | US |
| 204.181.6.0/27 | WHOIS (ARIN) | SHELBY COUNTY GOVERNMENT | US |
| 204.181.6.32/27 | WHOIS (ARIN) | JACKSON ENERGY AUTHORITY | US |
| 204.181.6.64/27 | WHOIS (ARIN) | HEALTH CHOICE | US |
| 204.181.6.128/27 | WHOIS (ARIN) | REFCO GROUP LLC | US |
| 204.181.6.160/27 | WHOIS (ARIN) | SOFTWARE EARNINGS | US |
| 204.181.35.96/27 | WHOIS (ARIN) | A4 Health Systems, Inc. | US |
| 204.181.36.224/27 | WHOIS (ARIN) | OROVILLE HOSPITAL | US |