AS21553 Aspirus, Inc.

ASP-MAIN - Aspirus, Inc. · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#10,976largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#50,269of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21553 in ASN lookup Look up an IP in this network (204.10.109.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

204.10.109.0/24
216.99.223.0/24

Other ASNs named Aspirus, Inc.

1 other network uses the same organisation name; together with AS21553 they announce 768 IPv4 addresses.

ASNNameIPv4 addresses

AS395277ST-LUKES-HOSPITAL - Aspirus, Inc. US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS20397#10973 BOXLAKE - Box Lake Networks, Inc.512

AS20416#10974 PRYSMIAN-01 - Prysmian Cables and Systems USA LLC512

AS21516#10975 ECH-2 - Ephrata Community Hospital512

AS21569#10977 DBU-AS - Dallas Baptist University512

AS21592#10978 MULTIVIEW - Multi-View Inc.512

AS21594#10979 IBSA - Interstate Battery System of America Inc.512

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