| 156.40.93.0/24 | UDHHS-4 | U.S. Department of Health & Human Services, US |
| 156.40.94.0/24 | UDHHS-4 | U.S. Department of Health & Human Services, US156.40.94.0/23 |
| 156.40.95.0/24 | UDHHS-4 | U.S. Department of Health & Human Services, US156.40.94.0/23 |
| 156.40.197.0/24 | UDHHS-4 | U.S. Department of Health & Human Services, US |
| 156.40.246.0/24 | National Institutes of Health, US156.40.224.0/19 | |
| 158.71.224.0/24 | NET-HHS2 | U.S. Dept. of Health and Human Services, US158.71.0.0/16 |
| 158.73.30.0/24 | U.S. Dept. of Health and Human Services, US158.73.0.0/16 | |
| 158.73.183.0/24 | U.S. Dept. of Health and Human Services, US158.73.0.0/16 | |
| 158.73.196.0/24 | CMSNET | U.S. Dept. of Health and Human Services, US158.73.0.0/16 |
| 158.74.38.0/24 | NET-HHS5 | U.S. Dept. of Health and Human Services, US158.74.0.0/16 |
uu: 15029 u4: 15029 u6: 15029 dd: 70, 3527, 5766, 13611, 22828, 26810, 30387 d4: 70, 3527, 5766, 13611, 22828, 26810, 30387 d6: 70, 3527, 5766, 22828, 26810
| AS70 | ➤ downstream | NLM-GW National Library of Medicine, US |
| AS3527 | ➤ downstream | NIH-NET National Institutes of Health, US |
| AS5766 | ➤ downstream | IHS-MD-AS Indian Health Service, US |
| AS13611 | ➤ downstream | CDC U.S. Center For Disease Control and Prevention, US |
| AS15029 | 🔼 upstream | TIC-USDHHS U.S. Department of Health & Human Services, US |
| AS22828 | ➤ downstream | ASN-FDA United States Food and Drug Administration, US |
| AS26810 | ➤ downstream | HHSNET-NOC-ASN U.S. Dept. of Health and Human Services, US |
| AS30387 | ➤ downstream | NIH-NET-NCCS National Institutes of Health, US |