AS51817 LONZA-AS Lonza AG

LONZA-AS Lonza AG · registered in Switzerland

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Switzerland#683largest network in CH by IPv4 space, of 741 · <0.01% of CH

Rank worldwide#68,085of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountrySwitzerland783 ASNs registered there

Open AS51817 in ASN lookup Look up an IP in this network (91.220.100.1) All networks in Switzerland

IPv4 prefixes

All 1 prefix, in address order.

91.220.100.0/24

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AS56817#686 AS-56817 TMN SA256

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