$ query “AS20836” --type=asn → 1 result(s)

AS20836 · CDLAN-AS

CDLAN SpA

AS20836 belongs to CDLAN SpA and is a mid-size transit provider, registered in Italy. The system announces a respectable 26 368 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Italy.

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

Basic Information

Country
🇮🇹 Italy
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
September 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
16 / 14
IPv6 Prefixes (raw / aggregated)
5 / 4
IPv4 Addresses
26 368
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/31
Geolocated Countries
🇮🇹 Italy (50 432 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
41 networks exchanging traffic without transit
Downstream Customers
10 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
55 unique BGP neighbors
Reach
22 networks in customer cone

Upstream Providers (3)

  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (16 total)

  • 95.157.64.0/18 (16 384 addresses (/18 prefix))
  • 217.171.32.0/20 (4 096 addresses (/20 prefix))
  • 178.249.184.0/21 (2 048 addresses (/21 prefix))
  • 185.47.228.0/22 (1 024 addresses (/22 prefix))
  • 185.164.176.0/23 (512 addresses (/23 prefix))
  • 185.43.151.0/24 (256 addresses (/24 prefix))
  • 5.253.198.0/24 (256 addresses (/24 prefix))
  • 91.142.143.0/24 (256 addresses (/24 prefix))
  • 185.112.90.0/24 (256 addresses (/24 prefix))
  • 185.142.120.0/24 (256 addresses (/24 prefix))
  • 37.220.42.0/24 (256 addresses (/24 prefix))
  • 193.234.181.0/24 (256 addresses (/24 prefix))
  • 193.235.114.0/24 (256 addresses (/24 prefix))
  • 37.220.41.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (5 total)

  • 2001:b60::/31
  • 2a07:2840::/32
  • 2a07:2847::/32
  • 2a0a:ec00::/32