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AS270National Aeronautics and Space Administration

United StatesRegistryARIN

As of 23rd October 2026, AS270 (National Aeronautics and Space…), a network registered in the United States with ARIN, originates 187 IPv4 prefixes covering 2.3M addresses. By IPv4 address space that makes it the 248th-largest of the 79,663 networks we see originating IPv4, and the 62nd-largest of 18,476 in the United States. It is seen behind 1 upstream network, most often AS297 (National Aeronautics and Space…), and in front of 4 downstream networks. Under 1% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 99% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

187

IPv6 prefixes

0

IPv4 addresses

2.3M

IPv6 /64s

0

Upstream graph

The networks AS270 is seen behind, one and two hops out, drawn from real AS paths.

AS270Toward the internet core
Upstream graph for AS270: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS270National Aeronaut…This networkAS297National Aeronaut…AS209Lumen (ex. Qwest)AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS270 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

10

adjacent networks

Upstreams
110%
Peers
550%
Downstreams
440%

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

Upstreams of AS270
NetworkCountryRelationshipPathsVantage pts
AS297National Aeronautics and Space AdministrationUSPeer15,17677

Prefixes

All 187

The largest blocks AS270 originates, widest first.

Largest prefixes originated by AS270
PrefixAddressesVisibility
198.120.0.0/14262k38/77
128.102.0.0/1665.5k77/77
128.155.0.0/1665.5k77/77
128.156.0.0/1665.5k77/77
128.157.0.0/1665.5k77/77
128.158.0.0/1665.5k77/77
128.159.0.0/1665.5k77/77
128.183.0.0/1665.5k77/77
128.217.0.0/1665.5k77/77
129.164.0.0/1665.5k77/77

Routing health

How AS270'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

  • Valid0.5%1
  • Invalid0.0%0
  • No ROA99.5%186

Propagation

  • Globally propagated90% of full-feed peers or more98.9%185
  • Partially propagated40% to 90%1.1%2
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 187 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

17 announced and 17 withdrawn in all; the most recent are shown.

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