$ query “AS25512” --type=asn → 1 result(s)

AS25512 · CDT-AS

CD-Telematika a.s.

AS25512 belongs to CD-Telematika a.s. and is a mid-size transit provider, registered in Czechia since 2002. The system announces a solid 117 760 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in Czechia, with additional presence in Sweden and Belgium.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇨🇿 Czechia
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
December 17, 2002
Last Changed
March 04, 2026
Last Seen
April 28, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
11 / 11
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
117 760
Largest IPv4 Prefix
/17 (32 768 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇨🇿 Czechia (219 136 IPs), 🇸🇪 Sweden (256 IPs), 🇧🇪 Belgium (256 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Good — 2 flagged IPs out of 117 760 total (0.00%)

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
14 networks exchanging traffic without transit
Downstream Customers
24 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
41 unique BGP neighbors
Reach
33 networks in customer cone

Upstream Providers (2)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (11 total)

  • 89.203.128.0/17 (32 768 addresses (/17 prefix))
  • 82.202.64.0/18 (16 384 addresses (/18 prefix))
  • 85.13.64.0/18 (16 384 addresses (/18 prefix))
  • 213.235.128.0/18 (16 384 addresses (/18 prefix))
  • 82.117.128.0/19 (8 192 addresses (/19 prefix))
  • 195.146.96.0/19 (8 192 addresses (/19 prefix))
  • 212.11.96.0/19 (8 192 addresses (/19 prefix))
  • 81.19.32.0/20 (4 096 addresses (/20 prefix))
  • 85.184.16.0/20 (4 096 addresses (/20 prefix))
  • 131.117.192.0/21 (2 048 addresses (/21 prefix))
  • 185.134.0.0/22 (1 024 addresses (/22 prefix))

IPv6 Prefixes (1 total)

  • 2001:1a48::/32