$ query “AS50300” --type=asn → 1 result(s)
AS50300 — CUSTDC
CustodianDC Limited
AS50300 is a hosting access provider run by CustodianDC Limited, registered in the United Kingdom since 2009. The network announces a respectable 11 264 IPv4 addresses. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
Basic Information
- Country
- 🇬🇧 United Kingdom
- Category
- Hosting
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- December 16, 2009
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 41 / 18
- IPv6 Prefixes (raw / aggregated)
- 8 / 7
- IPv4 Addresses
- 11 264
- Largest IPv4 Prefix
- /21 (2 048 addresses)
- Largest IPv6 Prefix
- /40
- Geolocated Countries
- 🇬🇧 GB (21 IPs), 🇬🇷 GR (1 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 1 flagged IPs out of 11 264 total (0.01%)
Connectivity Summary
- Upstream Providers
- 5 upstream autonomous systems providing transit
- Peers
- 1 175 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 5 downstream autonomous systems buying transit
- Degree
- 1 250 unique BGP neighbors (providers + customers + peers)
- Reach
- 9 — customer cone size measuring network influence
- Degree Rank
- #124
- Reach Rank
- #3 348
Upstream Providers (5)
Prefix Lists
IPv4 Prefixes (41 total)
- 5.102.168.0/21 (2 048 addresses)
- 109.74.240.0/22 (1 024 addresses)
- 109.74.248.0/22 (1 024 addresses)
- 176.12.104.0/22 (1 024 addresses)
- 185.14.164.0/22 (1 024 addresses)
- 185.48.164.0/22 (1 024 addresses)
- 109.74.246.0/23 (512 addresses)
- 109.74.254.0/23 (512 addresses)
- 176.12.108.0/23 (512 addresses)
- 185.32.72.0/23 (512 addresses)
- 92.118.16.0/24 (256 addresses)
- 109.74.244.0/24 (256 addresses)
- 109.74.252.0/24 (256 addresses)
- 176.12.110.0/24 (256 addresses)
- 185.32.75.0/24 (256 addresses)
- 185.42.65.0/24 (256 addresses)
- 185.104.136.0/24 (256 addresses)
- 193.33.198.0/24 (256 addresses)
IPv6 Prefixes (8 total)
- 2a00:1c10:100::/40
- 2a00:1c10::/43
- 2a00:1c10:30::/44
- 2a00:1c10:40::/44
- 2a00:1c10:cd0::/44
- 2a00:1c10:fff0::/44
- 2a00:1c10:da2::/48