| 63.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 63.208.0.0/13 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 63.208.0.0/13 | WHOIS (ARIN) | Level 3 Parent, LLC | US |
| 63.208.0.0/13 | ARIN assigned | — | US |
| 63.209.224.0/20 | WHOIS (ARIN) | Galaxy Internet | US |
| 63.209.72.0/21 | BGP route | AS26637 APEIRON001 | — |
| 63.210.16.0/21 | WHOIS (ARIN) | OPENBAND MULTIMEDIA, LLC | US |
| 63.210.48.0/21 | BGP route | AS16559 RealConnect, Inc | — |
| 63.214.32.0/21 | BGP route | AS16618 Finastra USA Corporation | — |
| 63.214.32.0/21 | WHOIS (ARIN) | CAVION.COM | US |
| 63.215.104.0/21 | BGP route | AS16618 Finastra USA Corporation | — |
| 63.208.160.0/22 | BGP route | AS27553 Telnet Worldwide, Inc. | — |
| 63.208.160.0/22 | WHOIS (ARIN) | Telnet Worldwide, Inc. | US |
| 63.209.208.0/22 | WHOIS (ARIN) | Netifice Communications, Inc. | US |
| 63.210.156.0/22 | WHOIS (ARIN) | Linden Lab | US |
| 63.211.68.0/22 | WHOIS (ARIN) | ARCHIPELAGO HOLDINGS INC | US |
| 63.211.72.0/22 | WHOIS (ARIN) | ARCHIPELAGO HOLDINGS INC | US |
| 63.214.32.0/22 | BGP route | AS16618 Finastra USA Corporation | — |
| 63.214.36.0/22 | BGP route | AS16618 Finastra USA Corporation | — |
| 63.214.164.0/22 | BGP route | AS20454 SECURED SERVERS LLC | — |
| 63.214.164.0/22 | WHOIS (ARIN) | CWIE | US |
| 63.214.228.0/22 | WHOIS (ARIN) | Cricket Communications Inc | US |
| 63.215.96.0/22 | BGP route | AS1 Level 3 Parent, LLC | — |
| 63.215.100.0/22 | BGP route | AS27425 IdeaTek Telcom, LLC | — |
| 63.215.100.0/22 | WHOIS (ARIN) | IdeaTek Telcom, LLC | US |
| 63.215.104.0/22 | BGP route | AS16618 Finastra USA Corporation | — |
| 63.208.36.0/23 | WHOIS (ARIN) | Onlylink | US |
| 63.208.168.0/23 | WHOIS (ARIN) | GIGLINX, Inc | US |
| 63.208.172.0/23 | BGP route | AS11168 SMART CHOICE COMMUNICATIONS, LLC | — |
| 63.208.198.0/23 | WHOIS (ARIN) | GIGLINX, Inc | US |
| 63.209.26.0/23 | WHOIS (ARIN) | GIGLINX, Inc | US |
| 63.209.32.0/23 | BGP route | AS20473 The Constant Company, LLC | — |
| 63.209.154.0/23 | BGP route | AS46198 Trilogy Dominicana, S.A. | — |
| 63.209.190.0/23 | WHOIS (ARIN) | GIGLINX, Inc | US |
| 63.210.44.0/23 | BGP route | AS21886 Netrix LLC | — |
| 63.210.44.0/23 | WHOIS (ARIN) | Netrix LLC | US |
| 63.210.60.0/23 | BGP route | AS12684 SES ASTRA S.A. | — |
| 63.210.60.0/23 | WHOIS (ARIN) | SES Americom | US |
| 63.210.112.0/23 | WHOIS (ARIN) | IP Direct, LLC | US |
| 63.210.128.0/23 | BGP route | AS25679 Tulsa Datacenter, LLC | — |
| 63.210.128.0/23 | WHOIS (ARIN) | Tulsa Datacenter, LLC | US |
| 63.210.146.0/23 | WHOIS (ARIN) | CentricVoice | US |
| 63.210.230.0/23 | WHOIS (ARIN) | CXLOYALTY, INC. | US |
| 63.210.236.0/23 | WHOIS (ARIN) | Cincinnati Communications, LLC | US |
| 63.211.38.0/23 | WHOIS (ARIN) | iNYC | US |
| 63.211.44.0/23 | WHOIS (ARIN) | New Bridge Technologies Inc. | US |
| 63.211.90.0/23 | BGP route | AS53316 CHEETAHMAIL | — |
| 63.211.90.0/23 | WHOIS (ARIN) | CHEETAHMAIL | US |
| 63.211.112.0/23 | WHOIS (ARIN) | Wayport, Inc. | US |
| 63.212.164.0/23 | WHOIS (ARIN) | New Bridge Technologies Inc. | US |
| 63.214.54.0/23 | WHOIS (ARIN) | New Bridge Technologies Inc. | US |
| 63.214.166.0/23 | BGP route | AS11572 PhoenixNAP LLC | — |
| 63.214.250.0/23 | WHOIS (ARIN) | Electronic Data Management Systems | US |
| 63.215.120.0/23 | BGP route | AS10461 Eze Castle Software LLC | — |
| 63.215.120.0/23 | WHOIS (ARIN) | TOWNSEND ANALYTICS, LTD. | US |
| 63.215.214.0/23 | WHOIS (ARIN) | Transworld Network, Corp. | US |
| 63.208.1.0/24 | BGP route | AS18447 HDC/HW Enterprise, LLC | — |
| 63.208.34.0/24 | WHOIS (ARIN) | NuTel | US |
| 63.208.49.0/24 | WHOIS (ARIN) | Onlylink | US |
| 63.208.55.0/24 | BGP route | AS6461 Zayo Bandwidth | — |
| 63.208.55.0/24 | WHOIS (ARIN) | American Fiber Systems, Inc. | US |
| 63.208.74.0/24 | BGP route | AS32181 GigeNET | — |
| 63.208.74.0/24 | WHOIS (ARIN) | Co-Location.com Inc. | US |
| 63.208.76.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.208.77.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.208.78.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.208.79.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.208.97.0/24 | WHOIS (ARIN) | NuTel | US |
| 63.208.102.0/24 | WHOIS (ARIN) | PSN.net | US |
| 63.208.139.0/24 | BGP route | AS11525 Hancock Rural Telephone Corp. | — |
| 63.208.139.0/24 | WHOIS (ARIN) | Hancock Internet | US |
| 63.208.149.0/24 | WHOIS (ARIN) | E-Sync Networks | US |
| 63.208.171.0/24 | WHOIS (ARIN) | NuTel | US |
| 63.208.195.0/24 | BGP route | AS12222 Akamai Technologies, Inc. | — |
| 63.208.195.0/24 | WHOIS (ARIN) | Akamai Customer Care | US |
| 63.208.196.0/24 | WHOIS (ARIN) | Dynamic Network Services, Inc. | US |
| 63.208.197.0/24 | WHOIS (ARIN) | EBSCO Publishing | US |
| 63.208.226.0/24 | WHOIS (ARIN) | GIGLINX, Inc | US |
| 63.208.229.0/24 | WHOIS (ARIN) | Net Zero | US |
| 63.209.6.0/24 | WHOIS (ARIN) | eManage.com, Inc. | US |
| 63.209.9.0/24 | WHOIS (ARIN) | Aestus Corporation | US |
| 63.209.12.0/24 | BGP route | AS32308 8x8, Inc. | — |
| 63.209.35.0/24 | BGP route | AS20473 The Constant Company, LLC | — |
| 63.209.135.0/24 | BGP route | AS36394 Grid4 Communications, Inc | — |
| 63.209.137.0/24 | BGP route | AS19067 Vail Systems, Inc. | — |
| 63.209.154.0/24 | BGP route | AS46198 Trilogy Dominicana, S.A. | — |
| 63.209.155.0/24 | BGP route | AS46198 Trilogy Dominicana, S.A. | — |
| 63.209.193.0/24 | BGP route | AS10397 Momentum Telecom, Inc. | — |
| 63.210.63.0/24 | BGP route | AS16559 RealConnect, Inc | — |
| 63.210.98.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.210.99.0/24 | BGP route | AS3257 GTT Communications Inc. | — |
| 63.210.102.0/24 | BGP route | AS19067 Vail Systems, Inc. | — |
| 63.210.128.0/24 | BGP route | AS25679 Tulsa Datacenter, LLC | — |
| 63.210.148.0/24 | BGP route | AS20473 The Constant Company, LLC | — |
| 63.210.208.0/24 | BGP route | AS394265 Box.com | — |
| 63.210.209.0/24 | BGP route | AS16504 Granite Telecommunications LLC | — |
| 63.210.211.0/24 | BGP route | AS394563 XTIUM, INC. | — |
| 63.210.230.0/24 | BGP route | AS5790 Trilegiant Corporation | — |
| 63.211.111.0/24 | BGP route | AS20473 The Constant Company, LLC | — |
| 63.211.201.0/24 | BGP route | AS32035 Sangoma US Inc. | — |
| 63.211.239.0/24 | BGP route | AS14602 Teliax, Inc. | — |