| 66.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 66.196.0.0/19 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.0.0/20 | WHOIS (ARIN) | Grande Communications Networks, LLC | — |
| 66.196.0.0/20 | ARIN assigned | — | US |
| 66.196.16.0/20 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.16.0/20 | WHOIS (ARIN) | Grande Communications Networks, LLC | US |
| 66.196.16.0/20 | ARIN assigned | — | US |
| 66.196.16.0/22 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.16.0/22 | WHOIS (ARIN) | Grande Communications CORPUS CHRISTI HUB 1 | US |
| 66.196.24.0/22 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.0.0/23 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.0.0/23 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.10.0/23 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.10.0/23 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.12.0/23 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.12.0/23 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.14.0/23 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.14.0/23 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.24.0/23 | WHOIS (ARIN) | Grande Communications CORPUS CHRISTI HUB 1 | US |
| 66.196.2.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.2.0/24 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.3.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.3.0/24 | WHOIS (ARIN) | Grande Communications ODESSA HUB 1 | US |
| 66.196.4.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.4.0/24 | WHOIS (ARIN) | Grande Communications ODESSA HUB 4 | US |
| 66.196.5.0/24 | WHOIS (ARIN) | Grande Communications Austin | US |
| 66.196.6.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.6.0/24 | WHOIS (ARIN) | Grande Communications FRISCO PARKER SQUARE | US |
| 66.196.8.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.8.0/24 | WHOIS (ARIN) | Grande Communications ODESSA HUB 3 | US |
| 66.196.9.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.9.0/24 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.20.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.20.0/24 | WHOIS (ARIN) | Grande Communications CORPUS CHRISTI HUB 1 | US |
| 66.196.21.0/24 | WHOIS (ARIN) | Grande Communications San Antonio | US |
| 66.196.22.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.22.0/24 | WHOIS (ARIN) | Grande Communications ODESSA HUB 4 | US |
| 66.196.23.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.23.0/24 | WHOIS (ARIN) | Grande Communications CASTLE HILLS | US |
| 66.196.26.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.26.0/24 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.27.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.27.0/24 | WHOIS (ARIN) | Grande Communications ODESSA HUB 1 | US |
| 66.196.28.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.28.0/24 | WHOIS (ARIN) | Grande Communications WACO HUB 3 | US |
| 66.196.29.0/24 | WHOIS (ARIN) | Grande Communications Austin Hub 2 | US |
| 66.196.30.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.30.0/24 | WHOIS (ARIN) | Grande Communications Frisco | US |
| 66.196.31.0/24 | BGP route | AS7459 Grande Communications Networks, LLC | — |
| 66.196.31.0/24 | WHOIS (ARIN) | Grande Communications FRISCO PARKER SQUARE | US |