$ query “AS1101” --type=asn → 1 result(s)

AS1101 · IP-EEND-AS

SURF B.V.

AS1101 belongs to SURF B.V. and is a residential access provider, established in the Netherlands in 2002. The system announces an impressive 1.8 million IPv4 addresses, including a /12, and supports IPv6. Its primary geographic footprint is in the Netherlands, with additional presence in the United States.

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

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
August 21, 2002
Last Changed
October 01, 2026
Last Seen
October 12, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
16 / 14
IPv6 Prefixes (raw / aggregated)
3 / 3
IPv4 Addresses
1 773 056
Largest IPv4 Prefix
/12 (1 048 576 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇳🇱 Netherlands (1 707 520 IPs), 🇺🇸 United States (65 536 IPs)
Prefix Changed
September 25, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
121 networks exchanging traffic without transit
Downstream Customers
2 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
130 unique BGP neighbors
Reach
4 networks in customer cone

Upstream Providers (2)

Prefix Lists

IPv4 Prefixes (16 total)

  • 145.192.0.0/12 (1 048 576 addresses (/12 prefix))
  • 145.208.0.0/13 (524 288 addresses (/13 prefix))
  • 44.137.0.0/16 (65 536 addresses (/16 prefix))
  • 145.99.0.0/16 (65 536 addresses (/16 prefix))
  • 145.220.0.0/16 (65 536 addresses (/16 prefix))
  • 192.42.128.0/22 (1 024 addresses (/22 prefix))
  • 145.102.4.0/23 (512 addresses (/23 prefix))
  • 192.42.118.0/23 (512 addresses (/23 prefix))
  • 185.17.73.0/24 (256 addresses (/24 prefix))
  • 185.100.59.0/24 (256 addresses (/24 prefix))
  • 192.12.54.0/24 (256 addresses (/24 prefix))
  • 192.16.200.0/24 (256 addresses (/24 prefix))
  • 192.42.117.0/24 (256 addresses (/24 prefix))
  • 192.150.94.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (3 total)

  • 2a04:601::/32
  • 2001:67c:6ec::/48
  • 2001:67c:12d8::/48