AS213273 OSISM OSISM GmbH

OSISM OSISM GmbH · registered in Germany

IPv4 addresses7682 prefixes · <0.001% of announced IPv4

Rank in Germany#1,445largest network in DE by IPv4 space, of 2,315 · <0.01% of DE

Rank worldwide#42,739of 79,396 networks with IPv4

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

CountryGermany2,599 ASNs registered there

Open AS213273 in ASN lookup Look up an IP in this network (81.163.192.1) All networks in Germany

IPv4 prefixes

All 2 prefixes, in address order.

81.163.192.0/23
81.163.194.0/24

IPv6 prefixes

All 1 prefix.

2a13:1a81::/32

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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