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| CIDR range | Maintainer | Description | Source |
|---|---|---|---|
| 128.231.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 129.43.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 130.14.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 137.187.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 148.184.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 156.40.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 157.98.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 162.99.224.0/19 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.0.0/16 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.8.0/21 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.16.0/20 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.32.0/19 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.64.0/18 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 165.112.128.0/17 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 192.231.145.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 192.231.146.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 192.231.147.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.31.12.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.77.76.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.77.77.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.77.165.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.77.182.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.179.0.0/21 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 198.179.4.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 199.249.158.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 205.128.154.0/23 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 206.241.19.0/24 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 206.241.252.0/23 | NLM-MNT | NLM.NIH.GOV maintainer | LEVEL3 |
| 2607:f220:411::/48 | MAINT-AS7034 | Proxy registration to prevent harm from ARIN-NONAUTH shutdown | ALTDB |
| 2607:f220:41e::/48 | MAINT-AS7034 | Proxy registration to prevent harm from ARIN-NONAUTH shutdown | ALTDB |
| 2607:f220:41e::/48 | NLM-MNT | NATIONAL LIBRARY OF MEDICINE | LEVEL3 |