$ query “AS43366” --type=asn → 1 result(s)

AS43366 · OSSO

OSSO B.V.

AS43366 is run by OSSO B.V. and is a mid-size transit provider, established in the Netherlands in 2007. The system announces 9 728 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the Netherlands, with additional presence in the United Kingdom.

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

Basic Information

Country
🇳🇱 Netherlands
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
July 20, 2007
Last Changed
March 04, 2026
Last Seen
April 30, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
9 / 8
IPv6 Prefixes (raw / aggregated)
3 / 3
IPv4 Addresses
9 728
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇳🇱 Netherlands (19 456 IPs), 🇬🇧 United Kingdom (256 IPs)
Prefix Changed
March 13, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 9 728 total (0.01%)

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
98 networks exchanging traffic without transit
Downstream Customers
11 downstreams buying transit
Unclassified
4 unclassified BGP neighbors
Degree
115 unique BGP neighbors
Reach
14 networks in customer cone

Upstream Providers (2)

  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS6830 — LIBERTYGLOBAL (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (9 total)

  • 217.21.192.0/20 (4 096 addresses (/20 prefix))
  • 185.12.144.0/22 (1 024 addresses (/22 prefix))
  • 185.37.124.0/22 (1 024 addresses (/22 prefix))
  • 185.79.8.0/22 (1 024 addresses (/22 prefix))
  • 185.159.136.0/22 (1 024 addresses (/22 prefix))
  • 91.194.224.0/23 (512 addresses (/23 prefix))
  • 195.28.22.0/23 (512 addresses (/23 prefix))
  • 195.88.160.0/23 (512 addresses (/23 prefix))

IPv6 Prefixes (3 total)

  • 2a05:6c80::/29
  • 2a07:b440::/29
  • 2a00:8080::/32