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Autonomous System

AS43278

Castles LLC

Announced IPs
2,304
CIDR prefixes
9
ASN
AS43278

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

53/100
Caution
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 7 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS43278 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

PrefixOrigin ASNsLast detected (UTC)
185.189.255.0/24 AS43278, AS214833 2026-07-23 20:23:41
170.168.20.0/24 AS43278, AS214833 2026-07-23 20:23:41
195.18.27.0/24 AS43278, AS214833 2026-07-23 09:53:28
185.207.214.0/24 AS43278, AS214833 2026-07-22 23:23:24
91.192.93.0/24 AS43278, AS214833 2026-07-22 23:23:24
80.242.59.0/24 AS43278, AS214833 2026-07-22 23:23:24
5.42.211.0/24 AS43278, AS214833 2026-07-22 23:23:24

Network profile

Source: PeeringDB →
Network type NSP
Traffic level 100-200Gbps
Geographic scope Europe
Peering policy Open
IRR record AS-CASTLES

Present at 4 internet exchanges: PITER-IX Saint-Petersburg: SPB_PEERING_VLAN, PITER-IX Helsinki, PITER-IX Kiev, GNM-IX

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
189.74.110.0/23 512
0.0%
Castles LLC BR Paraná Ponta Grossa
45.129.237.0/24 256
0.0%
Castles LLC AE
45.137.154.0/24 256
94.5%
PR Obrada Podataka Castles Novi Sad AE
91.220.80.0/24 256
0.8%
Castles LLC AE
95.181.158.0/24 256
91.8%
Castles LLC RU
152.89.199.0/24 256
18.8%
Castles LLC SC
185.17.0.0/24 256
0.0%
Castles LLC VG
189.74.109.0/24 256
0.0%
Castles LLC BR
212.46.36.0/24 256
2.3%
Castles LLC HK
213.109.97.0/24 256
0.0%
Eurasia-Star LLP AE
213.226.115.0/24 256
0.0%
Castles LLC AE

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS43278 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
45.137.154.0/24 35,058 2026-07-23 20:14:54
213.109.97.0/24 34,169 2026-07-23 20:14:54
95.181.158.0/24 33,677 2026-07-23 20:05:04
170.168.20.0/24 29,243 2026-07-23 20:06:46
45.129.237.0/24 27,514 2026-07-23 20:19:07
213.226.115.0/24 26,968 2026-07-23 20:05:08
212.46.36.0/24 26,962 2026-07-23 20:05:05
185.17.0.0/24 22,856 2026-07-23 20:05:11
91.220.80.0/24 17,539 2026-07-23 20:05:04
5.42.211.0/24 17,101 2026-07-23 19:14:26
194.147.90.0/24 15,632 2026-07-23 19:17:28
91.192.93.0/24 14,637 2026-07-23 19:15:26
80.242.59.0/24 14,007 2026-07-23 19:14:56
185.189.255.0/24 13,511 2026-07-23 19:17:28
185.207.214.0/24 13,484 2026-07-23 19:17:28
152.89.199.0/24 13,430 2026-07-23 20:24:43
195.18.27.0/24 12,982 2026-07-23 19:17:28
189.74.109.0/24 2,830 2026-07-23 15:50:50
189.74.110.0/24 2,817 2026-07-23 15:50:50
189.74.111.0/24 2,817 2026-07-23 15:50:50
185.254.67.0/24 91 2026-07-17 08:57:40
31.77.139.0/24 91 2026-07-17 08:57:24
77.105.132.0/24 61 2026-07-17 08:57:40
77.105.134.0/24 61 2026-07-17 08:57:40
153.52.67.0/24 12 2026-07-17 08:57:24
89.125.15.0/24 12 2026-07-17 08:57:25

Frequently Asked Questions

What is AS43278?

AS43278 is an Autonomous System Number assigned to Castles LLC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS43278 announce?

AS43278 announces 2.3K IPv4 addresses distributed across 9 routed CIDR prefixes. The network is registered in Russia.

Who operates AS43278?

AS43278 is operated by Castles LLC. The organization is based in Russia. You can view all IP ranges and related ASNs on the organization page.

What country is AS43278 registered in?

AS43278 is registered in Russia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-23 20:25:31 UTC
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