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AS20738Heart Internet limited

United KingdomRegistryRIPE NCC

As of 11th November 2026, AS20738 (Heart Internet limited), a network registered in the United Kingdom with RIPE NCC, originates 78 IPv4 prefixes covering 47.9k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 4,615th-largest of the 80,743 networks we see originating IPv4, and the 108th-largest of 2,122 in the United Kingdom. It is seen behind 1 upstream network, most often AS214073 (Heart Internet limited). 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

78

IPv6 prefixes

3

IPv4 addresses

47.9k

IPv6 /64s

197k

Upstream graph

The networks AS20738 is seen behind, one and two hops out, drawn from real AS paths.

AS20738Toward the internet core
Upstream graph for AS20738: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS20738Heart Internet li…This networkAS214073Heart Internet li…AS4455IX Reach LtdAS61231Neos Networks (SS…

Networks observed one and two hops upstream of AS20738 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 AS20738
NetworkCountryRelationshipPathsVantage pts
AS214073Heart Internet limitedGBPeer5,738137

Prefixes

All 81

The largest blocks AS20738 originates, widest first.

Largest prefixes originated by AS20738
PrefixAddressesVisibility
46.32.224.0/198.2k75/76
212.67.192.0/198.2k1/76
217.199.160.0/204.1k75/76
79.170.40.0/212k75/76
109.106.184.0/212k75/76
176.32.224.0/212k1/76
46.32.228.0/2351275/76
46.32.230.0/2351275/76
46.32.252.0/2351275/76
46.32.254.0/2351275/76

Routing health

How AS20738'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

  • Valid98.8%80
  • Invalid0.0%0
  • No ROA1.2%1

Propagation

  • Globally propagated90% of full-feed peers or more95.1%77
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%4.9%4

Prefix sizes

IPv4 — 78 prefixes

IPv6 — 3 prefixes

  • /4865.5k × /64100.0%3

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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