AS203966 a1-as A1 Internet BV

a1-as A1 Internet BV · registered in the Netherlands

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in Netherlands#752largest network in NL by IPv4 space, of 1,026 · <0.01% of NL

Rank worldwide#56,545of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryNetherlands1,098 ASNs registered there

Open AS203966 in ASN lookup Look up an IP in this network (213.171.70.1) All networks in Netherlands

IPv4 prefixes

All 1 prefix, in address order.

213.171.70.0/23

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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