AS42665 SIRTI-AS SIRTI S.p.A.

SIRTI-AS SIRTI S.p.A. · registered in Italy

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in Italy#857largest network in IT by IPv4 space, of 1,081 · <0.01% of IT

Rank worldwide#51,586of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryItaly1,121 ASNs registered there

Open AS42665 in ASN lookup Look up an IP in this network (193.33.18.1) All networks in Italy

IPv4 prefixes

All 1 prefix, in address order.

193.33.18.0/23

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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