| 72.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 72.21.160.0/19 | WHOIS (ARIN) | EZE Castle Integration Inc. | — |
| 72.21.160.0/19 | ARIN assigned | — | US |
| 72.21.160.0/22 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.176.0/22 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.162.0/23 | WHOIS (ARIN) | ECI VSITES BOS | US |
| 72.21.160.0/24 | WHOIS (ARIN) | ECI ECINET BOS | US |
| 72.21.161.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.161.0/24 | WHOIS (ARIN) | ECI WEBHOSTING BOS | US |
| 72.21.162.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.163.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.164.0/24 | WHOIS (ARIN) | ECI SF | US |
| 72.21.165.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.165.0/24 | WHOIS (ARIN) | Eze Castle Integration, Inc. | US |
| 72.21.166.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.167.0/24 | WHOIS (ARIN) | Eze Castle Integration, Inc. | US |
| 72.21.168.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.168.0/24 | WHOIS (ARIN) | Eze Castle Integration | US |
| 72.21.169.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.170.0/24 | WHOIS (ARIN) | Homefield Capital | US |
| 72.21.171.0/24 | WHOIS (ARIN) | ECI Managed Suites | US |
| 72.21.172.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.172.0/24 | WHOIS (ARIN) | Eze Castle Integration | US |
| 72.21.173.0/24 | BGP route | AS29746 S3 Partners LLC | — |
| 72.21.173.0/24 | WHOIS (ARIN) | S3 Partners, LLC | US |
| 72.21.174.0/24 | BGP route | AS27455 Williams Trading LLC | — |
| 72.21.174.0/24 | WHOIS (ARIN) | Williams Trading LLC | US |
| 72.21.175.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.176.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.176.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.177.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.178.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.179.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.179.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.180.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.180.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.181.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.181.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.182.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.182.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.183.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.183.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.184.0/24 | WHOIS (ARIN) | FFCM LLC | US |
| 72.21.185.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.185.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.186.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.186.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.187.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.187.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.188.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.188.0/24 | WHOIS (ARIN) | ECI Hosted Services | US |
| 72.21.189.0/24 | BGP route | AS14717 EZE Castle Integration Inc. | — |
| 72.21.166.128/27 | WHOIS (ARIN) | Kaintuck | US |
| 72.21.166.160/27 | WHOIS (ARIN) | Roney Capital Management | US |
| 72.21.166.192/27 | WHOIS (ARIN) | Hellman Jordan | US |
| 72.21.166.224/27 | WHOIS (ARIN) | Halcyon | US |
| 72.21.175.0/28 | WHOIS (ARIN) | Bascom Hill Partners, LLC | US |