subnet.im

AS19050U.S. Department of Health & Human Services

United StatesRegistryARINTypeContent

As of 26th September 2026, AS19050 (U.S. Department of Health & Human…), a content network registered in the United States with ARIN, originates 10 IPv4 prefixes covering 2.6k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 23,015th-largest of the 79,480 networks we see originating IPv4, and the 5,798th-largest of 18,421 in the United States. It is seen behind 1 upstream network, most often AS15029 (U.S. Department of Health & Human…), and in front of 7 downstream networks. 38% 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

10

IPv6 prefixes

3

IPv4 addresses

2.6k

IPv6 /64s

1.2M

Upstream graph

The networks AS19050 is seen behind, one and two hops out, drawn from real AS paths.

AS19050Toward the internet core
Upstream graph for AS19050: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS19050U.S. Department o…This networkAS15029U.S. Department o…AS701Verizon BusinessAS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS19050 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

16

adjacent networks

Upstreams
16%
Peers
850%
Downstreams
744%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS19050
NetworkCountryRelationshipPathsVantage pts
AS15029U.S. Department of Health & Human ServicesUSPeer10,519145

Prefixes

The largest blocks AS19050 originates, widest first.

Largest prefixes originated by AS19050
PrefixAddressesVisibility
156.40.93.0/2425681/81
156.40.94.0/2425681/81
156.40.95.0/2425681/81
156.40.197.0/2425681/81
156.40.246.0/2425681/81
158.71.224.0/2425681/81
158.73.30.0/2425681/81
158.73.183.0/2425681/81
158.73.196.0/2425681/81
158.74.38.0/2425681/81

Routing health

How AS19050'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

  • Valid38.5%5
  • Invalid0.0%0
  • No ROA61.5%8

Propagation

  • Globally propagated90% of full-feed peers or more100.0%13
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 3 prefixes

  • /441M × /6433.3%1
  • /4865.5k × /6466.7%2

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS19050 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.