$ query “AS39563” --type=asn → 1 result(s)
AS39563 · UCSYSTEMS
CTA Systems B.V.
AS39563 is operated by CTA Systems B.V. and serves as a residential access provider, established in the Netherlands in 2017. The system announces 2 304 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the Netherlands.
Basic Information
- Country
- 🇳🇱 Netherlands
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- November 10, 2017
- Last Changed
- October 03, 2026
- Last Seen
- October 10, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 9 / 3
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 2 304
- Largest IPv4 Prefix
- /22 (1 024 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇳🇱 Netherlands (2 304 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 5 upstreams providing transit
- Peers
- 162 networks exchanging traffic without transit
- Downstream Customers
- 1 downstream buying transit
- Unclassified
- 4 unclassified BGP neighbors
- Degree
- 172 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (5)
Prefix Lists
IPv4 Prefixes (9 total)
- 185.80.8.0/22 (1 024 addresses (/22 prefix))
- 185.231.16.0/22 (1 024 addresses (/22 prefix))
- 85.8.131.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2a0c:3900::/32