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AS219369ConstructInTech Limited

United KingdomRegistryRIPE NCC

As of 11th November 2026, AS219369 (ConstructInTech Limited), a network registered in the United Kingdom with RIPE NCC, originates 3 IPv4 prefixes covering 1k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 36,500th-largest of the 80,763 networks we see originating IPv4, and the 1,061st-largest of 2,122 in the United Kingdom. It is seen behind 2 upstream networks, most often AS209505 (Unchained ISP Limited) and AS52025 (ParadoxNetworks Limited). Every one of its announcements has 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

3

IPv6 prefixes

3

IPv4 addresses

1k

IPv6 /64s

8.6B

Upstream graph

The networks AS219369 is seen behind, one and two hops out, drawn from real AS paths.

AS219369Toward the internet core
Upstream graph for AS219369: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS219369ConstructInTech L…This networkAS52025ParadoxNetworks L…AS209505Unchained ISP Lim…AS835GoCodeIT IncAS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS35200TransitX Ltd

Networks observed one and two hops upstream of AS219369 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS219369
NetworkCountryRelationshipPathsVantage pts
AS209505Unchained ISP LimitedGBPeer278139
AS52025ParadoxNetworks LimitedGBPeer138138

Prefixes

The largest blocks AS219369 originates, widest first.

Largest prefixes originated by AS219369
PrefixAddressesVisibility
87.199.140.0/2351276/77
87.199.140.0/2425677/77
87.199.141.0/2425677/77
2a0b:9405::/324.3B × /6462/63
2a0b:9405::/332.1B × /6462/63
2a0b:9405:8000::/332.1B × /6462/63

Routing health

How AS219369'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%6
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 3 prefixes

  • /324.3B × /6433.3%1
  • /332.1B × /6466.7%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

  • Withdrawn195.10.233.0/2426th Oct 2026
  • Withdrawn2001:67c:b1c::/4826th Oct 2026

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