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AS20712Andrews & Arnold Ltd

United KingdomRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS20712 (Andrews & Arnold Ltd), an access network registered in the United Kingdom with RIPE NCC, originates 87 IPv4 prefixes covering 157k addresses and 21 IPv6 prefixes. By IPv4 address space that makes it the 1,595th-largest of the 79,525 networks we see originating IPv4, and the 34th-largest of 2,074 in the United Kingdom. It is seen behind 38 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 23 downstream networks. 85% 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

87

IPv6 prefixes

21

IPv4 addresses

157k

IPv6 /64s

5.6B

Upstream graph

The networks AS20712 is seen behind, one and two hops out, drawn from real AS paths.

AS20712Toward the internet core
Upstream graph for AS20712: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS20712Andrews & Arnold …This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS25091IP-Max SAAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS18106Viewqwest Pte LtdAS20130Depaul University

Networks observed one and two hops upstream of AS20712 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

196

adjacent networks

Upstreams
3819%
Peers
13569%
Downstreams
2312%

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

Upstreams of AS20712
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer3,075126
AS2914NTT America, Inc.USPeer2,439111
AS174Cogent Communications, LLCUSPeer97025
AS6939Hurricane Electric LLCUSPeer3509
AS25091IP-Max SACHPeer2865
AS18106Viewqwest Pte LtdSGPeer2724
AS13030Init7 (Switzerland) Ltd.CHPeer2022
AS38880Micron21 Datacentre Pty LtdAUPeer1902
AS14537Continent 8 LLCUSPeer1783
AS34549meerfarbig GmbH & Co. KGDEPeer1623

Prefixes

All 108

The largest blocks AS20712 originates, widest first.

Largest prefixes originated by AS20712
PrefixAddressesVisibility
81.187.0.0/1665.5k81/81
81.2.64.0/1816.4k81/81
90.155.0.0/1816.4k81/81
90.155.64.0/198.2k81/81
217.169.0.0/198.2k81/81
5.172.160.0/204.1k81/81
90.155.96.0/204.1k81/81
178.238.144.0/204.1k81/81
90.155.0.0/221k81/81
90.155.4.0/221k81/81

Routing health

How AS20712'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

  • Valid85.2%92
  • Invalid0.0%0
  • No ROA14.8%16

Propagation

  • Globally propagated90% of full-feed peers or more100.0%108
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 87 prefixes

IPv6 — 21 prefixes

  • /324.3B × /644.8%1
  • /341.1B × /644.8%1
  • /36268M × /644.8%1
  • /4865.5k × /6485.7%18

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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