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Autonomous System

AS50300

CustodianDC Limited

Announced IPs
11,008
CIDR prefixes
18
ASN
AS50300

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.

65/100
Moderate
How this score is built

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

Network profile

Source: PeeringDB →
Network type NSP
Traffic level 20-50Gbps
Geographic scope Europe
Traffic ratio Balanced
Peering policy Selective
IRR record AS-CUSTDC

Present at 3 internet exchanges: LINX LON1: Main, LONAP: LON0, AMS-IX

Top CIDR ranges

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS50300 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
109.74.255.0/24 22,215 2026-09-15 07:45:23
5.102.174.0/24 13,861 2026-09-15 08:01:45
176.12.106.0/24 13,585 2026-09-15 08:01:45
109.74.240.0/24 13,218 2026-09-15 08:01:45
5.102.172.0/24 13,096 2026-09-15 08:01:45
5.102.170.0/24 13,049 2026-09-15 08:01:45
5.102.171.0/24 13,033 2026-09-15 08:01:45
92.118.16.0/24 12,966 2026-09-15 08:01:45
109.74.249.0/24 12,562 2026-09-15 08:01:45
176.12.107.0/24 12,520 2026-09-15 08:01:45
176.12.110.0/24 12,329 2026-09-15 08:01:45
5.102.175.0/24 12,314 2026-09-15 08:01:45
5.102.173.0/24 12,284 2026-09-15 08:01:45
5.102.169.0/24 12,260 2026-09-15 08:01:45
5.102.168.0/24 12,240 2026-09-15 08:01:45
185.48.166.0/24 12,179 2026-09-15 08:01:45
109.74.246.0/24 12,179 2026-09-15 08:01:45
185.48.167.0/24 12,177 2026-09-15 08:01:45
185.48.164.0/24 12,144 2026-09-15 08:01:45
185.48.165.0/24 12,136 2026-09-15 08:01:45
109.74.247.0/24 12,103 2026-09-15 08:01:45
109.74.248.0/24 12,083 2026-09-15 08:01:45
109.74.241.0/24 12,028 2026-09-15 08:01:45
109.74.242.0/24 12,018 2026-09-15 08:01:45
109.74.243.0/24 11,980 2026-09-15 08:01:45
109.74.244.0/24 11,952 2026-09-15 08:01:45
176.12.108.0/24 11,885 2026-09-15 08:01:45
176.12.109.0/24 11,853 2026-09-15 08:01:45
176.12.104.0/24 11,792 2026-09-15 08:01:45
109.74.250.0/24 11,772 2026-09-15 08:01:45
109.74.252.0/24 11,770 2026-09-15 08:01:45
176.12.105.0/24 11,760 2026-09-15 08:01:45
109.74.251.0/24 11,759 2026-09-15 08:01:45
185.42.65.0/24 11,745 2026-09-15 08:01:45
185.32.75.0/24 11,712 2026-09-15 08:01:45
185.32.72.0/24 11,680 2026-09-15 08:01:45
185.14.164.0/22 11,663 2026-09-15 08:01:45
185.32.73.0/24 11,663 2026-09-15 08:01:45
193.33.198.0/24 11,496 2026-09-15 08:01:45
109.74.254.0/24 5,180 2026-06-24 17:22:23
185.104.136.0/24 2,785 2026-06-24 17:22:23

Frequently Asked Questions

What is AS50300?

AS50300 is an Autonomous System Number assigned to CustodianDC Limited. 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 AS50300 announce?

AS50300 announces 11.0K IPv4 addresses distributed across 18 routed CIDR prefixes. The network is registered in United Kingdom.

Who operates AS50300?

AS50300 is operated by CustodianDC Limited. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.

What country is AS50300 registered in?

AS50300 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-15 08:39:06 UTC
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