AS1149 SURFNET-AS SURF B.V.

SURFNET-AS SURF B.V. · registered in the Netherlands

IPv4 addresses1,0242 prefixes · <0.001% of announced IPv4

Rank in Netherlands#522largest network in NL by IPv4 space, of 1,026 · <0.01% of NL

Rank worldwide#35,412of 79,396 networks with IPv4

IPv6128 x /481 prefixes

CountryNetherlands1,098 ASNs registered there

Open AS1149 in ASN lookup Look up an IP in this network (145.100.118.1) All networks in Netherlands

IPv4 prefixes

All 2 prefixes, in address order.

145.100.118.0/23
145.116.218.0/23

IPv6 prefixes

All 1 prefix.

2001:610:9000::/41

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources