AS213959 AltStack ObSimRef Diensten B.V. trading as AltStack

AltStack ObSimRef Diensten B.V. trading as AltStack · registered in the Netherlands

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in Netherlands#706largest network in NL by IPv4 space, of 1,026 · <0.01% of NL

Rank worldwide#49,328of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryNetherlands1,098 ASNs registered there

Open AS213959 in ASN lookup Look up an IP in this network (157.173.74.1) All networks in Netherlands

IPv4 prefixes

All 2 prefixes, in address order.

157.173.74.0/24
185.104.131.0/24

IPv6 prefixes

All 1 prefix.

2001:67c:f54::/48

Similar-sized networks in Netherlands

ASNNameIPv4 addresses

AS212855#703 AS-LUJE Jelle Luteijn512

AS213427#704 LETTERMINT Lettermint B.V.512

AS213892#705 TRAVSYS-AS Travsys BV512

AS215088#707 SIDNLABS Stichting Internet Domeinregistratie Nederland512

AS215300#708 GLOBALLAYER-SA Global Layer B.V.512

AS215481#709 FLEXYNODE-AS Bram de Graaf trading as FlexyNode512

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