$ 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.
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 21, 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
- Good — 7 flagged IPs out of 1 773 056 total (0.00%)
- Open Proxies
- 9 known open proxies in this network
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