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AS43278Castles LLC

RussiaRegistryRIPE NCC

As of 26th September 2026, AS43278 (Castles LLC), a network registered in Russia with RIPE NCC, originates 21 IPv4 prefixes covering 5.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 15,036th-largest of the 79,516 networks we see originating IPv4, and the 882nd-largest of 4,942 in Russia. It is seen behind 9 upstream networks, most often AS59796 (StormWall s.r.o.) and AS43298 (Storm Networks LLC), and in front of 7 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 41% of its routes reach at least 90% of full-feed peers, and 10 prefixes are also originated by another network.

At a glance

IPv4 prefixes

21

IPv6 prefixes

1

IPv4 addresses

5.4k

IPv6 /64s

65.5k

Upstream graph

The networks AS43278 is seen behind, one and two hops out, drawn from real AS paths.

AS43278Toward the internet core
Upstream graph for AS43278: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS43278Castles LLCThis networkAS9002RETN LimitedAS35598INETCOM CARRIER L…AS43298Storm Networks LLCAS57494Adman LLCAS59796StormWall s.r.o.AS51907Kanton ZugAS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS20764CJSC RASCOMAS3216Vimpelcom PJSCAS2914NTT America, Inc.AS33891Core-Backbone GmbH

Networks observed one and two hops upstream of AS43278 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

47

adjacent networks

Upstreams
919%
Peers
3166%
Downstreams
715%

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

Upstreams of AS43278
NetworkCountryRelationshipPathsVantage pts
AS59796StormWall s.r.o.SKPeer84475
AS43298Storm Networks LLCRUPeer41781
AS35598INETCOM CARRIER LLCRUPeer13199
AS9002RETN LimitedGBPeer897
AS57494Adman LLCRUPeer8281
AS32590Valve CorporationUSPeer631
AS31500Global Network Management IncAGPeer3636
AS25091IP-Max SACHPeer242
AS62255BiMajLink d.o.o.SIPeer1710

Prefixes

The largest blocks AS43278 originates, widest first.

Largest prefixes originated by AS43278
PrefixAddressesVisibility
5.42.211.0/2425623/81
45.129.237.0/2425681/81
45.137.154.0/2425681/81
80.242.59.0/2425623/81
91.192.93.0/2425621/81
91.220.80.0/2425681/81
95.181.158.0/2425681/81
152.89.199.0/242561/81
170.168.20.0/2425631/81
185.17.0.0/2425681/81

Routing health

How AS43278'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%22
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more40.9%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%59.1%13

Prefix sizes

IPv4 — 21 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS43278 started or stopped in this period.

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