| 204.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 204.212.0.0/14 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.212.0.0/14 | WHOIS (ARIN) | Cogent Communications, LLC | US |
| 204.212.0.0/14 | ARIN assigned | — | US |
| 204.215.64.0/18 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.215.64.0/18 | WHOIS (ARIN) | RCN | US |
| 204.215.64.0/19 | BGP route | AS20001 Charter Communications Inc | — |
| 204.215.96.0/19 | BGP route | AS20001 Charter Communications Inc | — |
| 204.212.176.0/20 | BGP route | AS19893 NTT Global Data Centers Americas, INC. | — |
| 204.212.176.0/20 | WHOIS (ARIN) | NTT Global Data Centers Americas, INC. | US |
| 204.213.176.0/20 | BGP route | AS6062 NETPLEX | — |
| 204.214.144.0/20 | BGP route | AS7810 CompuCom Systems, Inc. | — |
| 204.214.144.0/20 | WHOIS (ARIN) | Compucom Systems | US |
| 204.215.32.0/20 | BGP route | AS2379 CenturyLink Communications, LLC | — |
| 204.215.64.0/20 | BGP route | AS11404 Wave Broadband | — |
| 204.215.80.0/20 | BGP route | AS11404 Wave Broadband | — |
| 204.215.96.0/20 | BGP route | AS11404 Wave Broadband | — |
| 204.215.112.0/20 | BGP route | AS11404 Wave Broadband | — |
| 204.215.240.0/20 | BGP route | AS2379 CenturyLink Communications, LLC | — |
| 204.215.240.0/20 | WHOIS (ARIN) | Sprint-United Telephone of Florida | — |
| 204.213.232.0/22 | BGP route | AS6062 NETPLEX | — |
| 204.212.242.0/23 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.212.244.0/23 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.213.198.0/23 | BGP route | AS10461 Eze Castle Software LLC | — |
| 204.213.198.0/23 | WHOIS (ARIN) | Eze Castle Software LLC | US |
| 204.215.248.0/23 | WHOIS (ARIN) | Advanced Info Systems Group (AISG) | US |
| 204.212.2.0/24 | WHOIS (ARIN) | Copart Auto Auctions | US |
| 204.212.38.0/24 | BGP route | AS7733 Frazier Mountain Internet Service | — |
| 204.212.40.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.212.40.0/24 | WHOIS (ARIN) | Computers Unlimited | US |
| 204.212.166.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.212.170.0/24 | BGP route | AS30021 SonicWALL, Inc. | — |
| 204.212.170.0/24 | WHOIS (ARIN) | SonicWall | US |
| 204.212.175.0/24 | BGP route | AS13431 Millennium Partners, L.P. | — |
| 204.212.175.0/24 | WHOIS (ARIN) | MILLENIUM PARTNERS, L.P. | US |
| 204.212.241.0/24 | BGP route | AS11139 Cable & Wireless Dominica | — |
| 204.212.242.0/24 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.212.243.0/24 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.212.244.0/24 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.212.245.0/24 | BGP route | AS14813 Columbus Telecommunications (Barbados) Limited | — |
| 204.213.141.0/24 | WHOIS (ARIN) | Jobson Publishing | US |
| 204.213.190.0/24 | BGP route | AS174 Cogent Communications, LLC | — |
| 204.213.194.0/24 | BGP route | AS18632 Volcano Vision, Inc. | — |
| 204.213.194.0/24 | WHOIS (ARIN) | Volcano Telephone | US |
| 204.213.197.0/24 | WHOIS (ARIN) | Agency.com | US |
| 204.214.50.0/24 | BGP route | AS54573 Brightstar Global Solutions Corporation | — |
| 204.215.32.0/24 | BGP route | AS209 CenturyLink Communications, LLC | — |
| 204.215.37.0/24 | BGP route | AS209 CenturyLink Communications, LLC | — |
| 204.215.40.0/24 | BGP route | AS209 CenturyLink Communications, LLC | — |
| 204.215.64.0/24 | BGP route | AS22773 Cox Communications Inc. | — |
| 204.215.241.0/24 | WHOIS (ARIN) | Tecnet | US |
| 204.215.245.0/24 | WHOIS (ARIN) | Association of Public-Safety Communications Officials | US |
| 204.215.246.0/24 | WHOIS (ARIN) | Lake Sumter Community College | US |
| 204.215.247.0/24 | WHOIS (ARIN) | City of Winter Park | US |
| 204.215.251.0/24 | WHOIS (ARIN) | World Ramp | US |
| 204.215.252.0/24 | WHOIS (ARIN) | World Ramp | US |
| 204.215.253.0/24 | WHOIS (ARIN) | ZOOMPH Network | US |
| 204.215.254.0/24 | WHOIS (ARIN) | ZOOMPH Network | US |
| 204.215.255.0/24 | WHOIS (ARIN) | Crystal Wind Communications | US |
| 204.214.11.0/25 | WHOIS (ARIN) | DEKALB COUNTY GOVERNMENT | US |
| 204.212.113.64/26 | WHOIS (ARIN) | INTERTEL/PUEBLO SAN FELIPE | US |
| 204.214.6.0/26 | WHOIS (ARIN) | DATA IMAGING & ASSOCIATES | US |
| 204.214.196.128/26 | WHOIS (ARIN) | WRIGHT OF THOMASVILLE | US |
| 204.215.244.192/26 | WHOIS (ARIN) | Orbiter Online | US |
| 204.212.171.96/27 | WHOIS (ARIN) | CEVA LOGISTICS | US |
| 204.213.81.0/27 | WHOIS (ARIN) | Spieler's Inc. | US |
| 204.214.11.224/27 | WHOIS (ARIN) | MOTOROLA SOLUTIONS, INC. | US |
| 204.214.51.0/27 | WHOIS (ARIN) | Personnel Decisions Research Institutes, Inc. | US |
| 204.214.51.32/27 | WHOIS (ARIN) | Personnel Decisions Research Institutes, Inc. | US |
| 204.214.51.128/27 | WHOIS (ARIN) | State Farm Mutual Automobile Insurance Company | US |
| 204.214.93.192/27 | WHOIS (ARIN) | RJE Telecom | US |
| 204.214.194.128/27 | WHOIS (ARIN) | STATE DEPT. FEDERAL CREDIT UNI | US |
| 204.215.240.64/27 | WHOIS (ARIN) | Baugh Software Corp | US |
| 204.215.240.160/27 | WHOIS (ARIN) | Hebrew Day School | US |
| 204.212.171.64/28 | WHOIS (ARIN) | Leprino Foods | US |
| 204.213.51.48/28 | WHOIS (ARIN) | Aerospace Distributors | US |
| 204.214.48.32/28 | WHOIS (ARIN) | Macy's Systems and Technology, Inc. | US |
| 204.214.127.144/28 | WHOIS (ARIN) | EAGLE SOFTWARE GROUP | US |
| 204.214.196.208/28 | WHOIS (ARIN) | SYNOPSYS INC. | US |
| 204.215.53.0/28 | WHOIS (ARIN) | SIKA CORPORATION | US |
| 204.212.167.192/29 | WHOIS (ARIN) | STOPS Inc | US |
| 204.212.171.56/29 | WHOIS (ARIN) | INTEGREON MANAGED SOLUTIONS IN | US |
| 204.212.171.184/29 | WHOIS (ARIN) | Neptune Society | US |
| 204.212.171.240/29 | WHOIS (ARIN) | ARCHDIOCESE OF LA EDUC & WELFA | US |
| 204.213.51.8/29 | WHOIS (ARIN) | Molecular Metallurgy | US |