subnet.im

AS70National Library of Medicine

United StatesRegistryARIN

As of 23rd October 2026, AS70 (National Library of Medicine), a network registered in the United States with ARIN, originates 65 IPv4 prefixes covering 217k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,244th-largest of the 79,652 networks we see originating IPv4, and the 347th-largest of 18,475 in the United States. It is seen behind 2 upstream networks, most often AS19050 (U.S. Department of Health & Human…) and AS10886 (University of Maryland), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 94% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

65

IPv6 prefixes

2

IPv4 addresses

217k

IPv6 /64s

131k

Upstream graph

The networks AS70 is seen behind, one and two hops out, drawn from real AS paths.

AS70Toward the internet core
Upstream graph for AS70: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS70National Library …This networkAS10886University of Mar…AS19050U.S. Department o…AS1299Arelion (fka. Tel…AS6461Zayo BandwidthAS15029U.S. Department o…

Networks observed one and two hops upstream of AS70 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

6

adjacent networks

Upstreams
233%
Peers
350%
Downstreams
117%

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

Upstreams of AS70
NetworkCountryRelationshipPathsVantage pts
AS19050U.S. Department of Health & Human ServicesUSPeer4,589140
AS10886University of MarylandUSPeer364140

Prefixes

All 67

The largest blocks AS70 originates, widest first.

Largest prefixes originated by AS70
PrefixAddressesVisibility
130.14.0.0/1665.5k77/77
130.14.0.0/1732.8k76/77
130.14.128.0/1732.8k76/77
130.14.0.0/1816.4k32/77
130.14.64.0/1816.4k32/77
130.14.128.0/1816.4k32/77
130.14.192.0/1816.4k32/77
130.14.200.0/212k77/77
130.14.192.0/221k77/77
130.14.232.0/221k77/77

Routing health

How AS70'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

  • Valid100.0%67
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more94.0%63
  • Partially propagated40% to 90%6.0%4
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 65 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS70 started or stopped in this period.

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