AS26810U.S. Dept. of Health and Human Services
United StatesRegistryARINAs of 26th September 2026, AS26810 (U.S. Dept. of Health and Human Services), a network registered in the United States with ARIN, originates 18 IPv4 prefixes covering 314k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 960th-largest of the 79,480 networks we see originating IPv4, and the 250th-largest of 18,421 in the United States. It is seen behind 1 upstream network, most often AS19050 (U.S. Department of Health & Human…). 5% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS26810 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS26810 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
2
adjacent networks
- Upstreams
- 150%
- Peers
- 150%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS19050U.S. Department of Health & Human Services | US | Peer | 1,650 | 145 |
Prefixes
The largest blocks AS26810 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 158.70.0.0/16 | 65.5k | 81/81 |
| 158.72.0.0/16 | 65.5k | 81/81 |
| 158.74.0.0/16 | 65.5k | 81/81 |
| 158.71.0.0/17 | 32.8k | 81/81 |
| 162.99.0.0/17 | 32.8k | 81/81 |
| 158.71.128.0/18 | 16.4k | 81/81 |
| 162.99.128.0/18 | 16.4k | 81/81 |
| 158.71.192.0/19 | 8.2k | 81/81 |
| 162.99.192.0/19 | 8.2k | 81/81 |
| 198.179.0.0/23 | 512 | 81/81 |
Routing health
How AS26810's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid4.8%1
- Invalid0.0%0
- No ROA95.2%20
Propagation
- Globally propagated90% of full-feed peers or more100.0%21
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 18 prefixes
IPv6 — 3 prefixes
- /241.1T × /6433.3%1
- /441M × /6466.7%2
Recent changes
Announcements that started or stopped since 27th Aug 2026.
No announcement by AS26810 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.