subnet.im

AS243L3Harris Technologies, Inc.

United StatesRegistryARIN

As of 22nd October 2026, AS243 (L3Harris Technologies, Inc.), a network registered in the United States with ARIN, originates 128 IPv4 prefixes covering 778k addresses. By IPv4 address space that makes it the 545th-largest of the 79,655 networks we see originating IPv4, and the 130th-largest of 18,475 in the United States. It is seen behind 1 upstream network, most often AS32787 (Akamai (Prolexic)). 6% 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

128

IPv6 prefixes

0

IPv4 addresses

778k

IPv6 /64s

0

Upstream graph

The networks AS243 is seen behind, one and two hops out, drawn from real AS paths.

AS243Toward the internet core
Upstream graph for AS243: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS243L3Harris Technolo…This networkAS32787Akamai (Prolexic)AS1273Vodafone Group PLCAS32590Valve Corporation

Networks observed one and two hops upstream of AS243 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.

Upstreams of AS243
NetworkCountryRelationshipPathsVantage pts
AS32787Akamai (Prolexic)USPeer9,85677

Prefixes

All 128

The largest blocks AS243 originates, widest first.

Largest prefixes originated by AS243
PrefixAddressesVisibility
128.170.0.0/1665.5k77/77
137.237.0.0/1665.5k77/77
138.254.0.0/1665.5k77/77
141.199.0.0/1665.5k77/77
142.65.0.0/1665.5k77/77
147.177.0.0/1665.5k77/77
148.104.0.0/1665.5k77/77
151.190.0.0/1665.5k77/77
158.147.0.0/1665.5k77/77
159.62.0.0/1665.5k77/77

Routing health

How AS243'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

  • Valid6.3%8
  • Invalid0.0%0
  • No ROA93.8%120

Propagation

  • Globally propagated90% of full-feed peers or more100.0%128
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 128 prefixes

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

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