| 66.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 66.192.0.0/14 | BGP route | AS3549 Level 3 Parent, LLC | — |
| 66.192.0.0/14 | WHOIS (ARIN) | Level 3 Parent, LLC | US |
| 66.192.0.0/14 | ARIN assigned | — | US |
| 66.193.144.0/20 | BGP route | AS3549 Level 3 Parent, LLC | — |
| 66.192.48.0/21 | BGP route | AS17378 TierPoint, LLC | — |
| 66.192.48.0/21 | WHOIS (ARIN) | Redundant Networks | — |
| 66.192.152.0/21 | WHOIS (ARIN) | Dakota Communications | US |
| 66.192.208.0/21 | BGP route | AS3549 Level 3 Parent, LLC | — |
| 66.193.8.0/21 | BGP route | AS11402 Charlotte Colocation Center, LLc | — |
| 66.193.8.0/21 | WHOIS (ARIN) | Charlotte Colocation | US |
| 66.193.136.0/21 | WHOIS (ARIN) | Intrinium, Inc. | US |
| 66.195.192.0/21 | BGP route | AS11402 Charlotte Colocation Center, LLc | — |
| 66.192.220.0/22 | BGP route | AS3549 Level 3 Parent, LLC | — |
| 66.193.88.0/22 | BGP route | AS32899 Bresco Broadband | — |
| 66.193.88.0/22 | WHOIS (ARIN) | Bresco Broadband | US |
| 66.193.128.0/22 | WHOIS (ARIN) | Tekfinity | US |
| 66.194.140.0/22 | BGP route | AS32899 Bresco Broadband | — |
| 66.194.140.0/22 | WHOIS (ARIN) | Bresco Broadband | US |
| 66.194.176.0/22 | BGP route | AS46379 Siena University | — |
| 66.195.72.0/22 | WHOIS (ARIN) | Spa.Net | US |
| 66.195.216.0/22 | WHOIS (ARIN) | DIGITAL SYSTEMS SUPPORT | US |
| 66.195.240.0/22 | WHOIS (ARIN) | HostDime.com, Inc. | US |
| 66.192.30.0/23 | BGP route | AS23314 Summit Broadband | — |
| 66.192.30.0/23 | WHOIS (ARIN) | Level 3 Communications, Inc. | US |
| 66.192.96.0/23 | BGP route | AS14467 KUA.net | — |
| 66.192.122.0/23 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.176.0/23 | WHOIS (ARIN) | Wyndham Resort Development Corporation | US |
| 66.192.204.0/23 | BGP route | AS22475 MVP Health Plan Inc. | — |
| 66.192.204.0/23 | WHOIS (ARIN) | MVP Health Plan Inc. | US |
| 66.193.2.0/23 | BGP route | AS33745 Atos IT Solutions and Services Inc | — |
| 66.193.46.0/23 | WHOIS (ARIN) | WAASI | US |
| 66.193.60.0/23 | WHOIS (ARIN) | ADAN Technologies | US |
| 66.193.94.0/23 | WHOIS (ARIN) | Xerox Corporation | US |
| 66.193.160.0/23 | BGP route | AS23314 Summit Broadband | — |
| 66.193.160.0/23 | WHOIS (ARIN) | Level 3 Communications, Inc. | US |
| 66.193.174.0/23 | WHOIS (ARIN) | HostDime.com DimeNoc - Infinitum Technologies | US |
| 66.193.176.0/23 | WHOIS (ARIN) | Callcentric Wholesale, Inc. | US |
| 66.193.206.0/23 | BGP route | AS29985 AMN Healthcare | — |
| 66.193.230.0/23 | WHOIS (ARIN) | HostDime.com DimeNoc - Infinitum Technologies | US |
| 66.194.44.0/23 | BGP route | AS23314 Summit Broadband | — |
| 66.194.44.0/23 | WHOIS (ARIN) | Level 3 Communications, Inc. | US |
| 66.194.70.0/23 | WHOIS (ARIN) | LIGHTPOINT COLOCATION & HOSTING LLC | US |
| 66.194.104.0/23 | BGP route | AS13755 St. Petersburg College | — |
| 66.194.112.0/23 | WHOIS (ARIN) | NBCUniversal | US |
| 66.194.152.0/23 | WHOIS (ARIN) | HostDime.com DimeNoc - Infinitum Technologies | US |
| 66.194.210.0/23 | BGP route | AS394829 X1 Communcations Inc | — |
| 66.194.210.0/23 | WHOIS (ARIN) | X1 Communcations Inc | US |
| 66.194.238.0/23 | WHOIS (ARIN) | HostDime.com DimeNoc - Infinitum Technologies | US |
| 66.194.250.0/23 | WHOIS (ARIN) | CeraNet, Inc. | US |
| 66.195.16.0/23 | WHOIS (ARIN) | HostDime.com, Inc. | US |
| 66.195.18.0/23 | WHOIS (ARIN) | HostDime.com, Inc. | US |
| 66.195.118.0/23 | BGP route | AS19119 Rollins College | — |
| 66.195.118.0/23 | WHOIS (ARIN) | Rollins College | US |
| 66.195.124.0/23 | WHOIS (ARIN) | HostDime.com, Inc. | US |
| 66.195.126.0/23 | WHOIS (ARIN) | HostDime.com, Inc. | US |
| 66.195.144.0/23 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.195.178.0/23 | WHOIS (ARIN) | Tekfinity | US |
| 66.195.238.0/23 | BGP route | AS32899 Bresco Broadband | — |
| 66.195.238.0/23 | WHOIS (ARIN) | Bresco Broadband | US |
| 66.192.0.0/24 | WHOIS (ARIN) | Foundstone | US |
| 66.192.13.0/24 | BGP route | AS19881 Valley Telecommunications Company | — |
| 66.192.13.0/24 | WHOIS (ARIN) | Valley Connections LLC | US |
| 66.192.14.0/24 | BGP route | AS32268 Artisan Partners Limited Partnership | — |
| 66.192.24.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.25.0/24 | BGP route | AS29707 Orion Federal Credit Union | — |
| 66.192.26.0/24 | WHOIS (ARIN) | Third Party Verification | US |
| 66.192.29.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.53.0/24 | WHOIS (ARIN) | Twelve Horses North America, LLC | US |
| 66.192.54.0/24 | WHOIS (ARIN) | Triangle Research | US |
| 66.192.59.0/24 | WHOIS (ARIN) | General Parts | US |
| 66.192.62.0/24 | WHOIS (ARIN) | The Bencraig Center | US |
| 66.192.63.0/24 | BGP route | AS26153 Blue Cross Blue Shield of South Carolina | — |
| 66.192.63.0/24 | WHOIS (ARIN) | Blue Cross Blue Shield of South Carolina | US |
| 66.192.73.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.73.0/24 | WHOIS (ARIN) | Milwaukee PC | US |
| 66.192.75.0/24 | BGP route | AS32617 The STEAK N SHAKE Company | — |
| 66.192.79.0/24 | WHOIS (ARIN) | Gardner Publications Inc. | US |
| 66.192.86.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.89.0/24 | BGP route | AS18929 THE AMERICAN ASSOCIATION OF MOTOR VEHICLE ADMINISTRATORS | — |
| 66.192.98.0/24 | WHOIS (ARIN) | Accredo Health, Inc. | US |
| 66.192.100.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.101.0/24 | BGP route | AS25642 The Frohman Group Inc. | — |
| 66.192.101.0/24 | WHOIS (ARIN) | Spiderhost Inc | US |
| 66.192.102.0/24 | WHOIS (ARIN) | Spiderhost Inc | US |
| 66.192.109.0/24 | WHOIS (ARIN) | Florida Today | US |
| 66.192.173.0/24 | BGP route | AS13628 AMERISOURCEBERGEN | — |
| 66.192.185.0/24 | BGP route | AS54236 Pacific Press Publishing Association, Inc | — |
| 66.192.194.0/24 | BGP route | AS22984 Lightspeed Communications | — |
| 66.192.195.0/24 | BGP route | AS22984 Lightspeed Communications | — |
| 66.192.201.0/24 | BGP route | AS11218 Ted Moudis Associates, Inc. | — |
| 66.192.204.0/24 | BGP route | AS22475 MVP Health Plan Inc. | — |
| 66.192.210.0/24 | BGP route | AS22362 Global Tel*link Corporation | — |
| 66.192.214.0/24 | BGP route | AS19233 Dialogix Telecom | — |
| 66.192.215.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.192.216.0/24 | BGP route | AS19233 Dialogix Telecom | — |
| 66.192.217.0/24 | BGP route | AS3549 Level 3 Parent, LLC | — |
| 66.192.224.0/24 | BGP route | AS18524 SOUTHEASTERN ASSET MANAGEMENT, INC. | — |
| 66.192.233.0/24 | BGP route | AS3356 Level 3 Parent, LLC | — |
| 66.193.6.0/24 | BGP route | AS39985 Rack Room Shoes | — |
| 66.193.23.0/24 | BGP route | AS400057 Upstate Niagara Cooperatives | — |