AS50522 SEWAN-NL Sewan Nederland B.V.

SEWAN-NL Sewan Nederland B.V. · registered in the Netherlands

IPv4 addresses16,38411 prefixes · <0.001% of announced IPv4

Rank in Netherlands#109largest network in NL by IPv4 space, of 1,026 · 0.04% of NL

Rank worldwide#6,931of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryNetherlands1,098 ASNs registered there

Open AS50522 in ASN lookup Look up an IP in this network (81.23.244.1) All networks in Netherlands

IPv4 prefixes

All 11 prefixes, in address order.

81.23.244.0/22
81.173.0.0/22
81.173.7.0/24
81.173.32.0/22
81.173.48.0/20
81.173.64.0/20
81.173.96.0/22
81.173.125.0/24
81.173.126.0/23
109.235.32.0/21
185.61.68.0/22

IPv6 prefixes

All 1 prefix.

2a03:be00::/32

Similar-sized networks in Netherlands

ASNNameIPv4 addresses

AS34373#106 XXLnet XXLnet B.V.16,384

AS49784#107 NL-NETVISIT Netvisit B.V.16,384

AS58075#108 X2COM X2com BV16,384

AS44074#110 RFH-AS Cooperatie Royal FloraHolland U.A.16,384

AS8455#111 ATOM86-AS atom86 BV15,872

AS213120#112 PROLEXIC-IP-PROTECT Akamai International B.V.15,872

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