AS21101 SISTEMIUNO-AS Sistemi Hardware&Software S.P.A.

SISTEMIUNO-AS Sistemi Hardware&Software S.P.A. · registered in Italy

IPv4 addresses5,1207 prefixes · <0.001% of announced IPv4

Rank in Italy#234largest network in IT by IPv4 space, of 1,081 · <0.01% of IT

Rank worldwide#13,622of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryItaly1,121 ASNs registered there

Open AS21101 in ASN lookup Look up an IP in this network (91.240.230.1) All networks in Italy

IPv4 prefixes

All 7 prefixes, in address order.

91.240.230.0/23
94.143.96.0/23
94.143.98.0/24
94.143.100.0/22
185.5.94.0/23
193.109.32.0/21
193.150.112.0/24

Similar-sized networks in Italy

ASNNameIPv4 addresses

AS15515#231 UNICREDIT-AS-VR-IT UniCredit S.p.A.5,120

AS15720#232 Poste Italiane S.p.A.5,120

AS16027#233 Allitude-1 Allitude S.p.A.5,120

AS21454#235 ENET-AS Easynet S.p.A.5,120

AS34978#236 ASLINKWIRELESS Linkwireless srl5,120

AS44942#237 DIGITALRETI-AS Digitalreti srl5,120

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