AS40427 Cisco Systems Ironport Division

IRONPORT-SYSTEMS-CI365 - Cisco Systems Ironport Division · registered in the United States

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in United States#11,561largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#51,406of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS40427 in ASN lookup Look up an IP in this network (194.165.198.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

194.165.198.0/23

Other ASNs named Cisco Systems Ironport Division

3 other networks use the same organisation name; together with AS40427 they announce 49,664 IPv4 addresses.

ASNNameIPv4 addresses

AS16417IRONPORT-SYSTEMS-INC - Cisco Systems Ironport Division US29,952

AS30238AS-IRONP-VEGA - Cisco Systems Ironport Division US15,360

AS30215AS-CISCOHPS-APAC - Cisco Systems Ironport Division US3,840

Similar-sized networks in United States

ASNNameIPv4 addresses

AS40360#11558 PANERA - PANERA BREAD COMPANY512

AS40373#11559 UMC-NET - University Medical Center, Inc512

AS40375#11560 THE-BANK-OF-NEW-YORK-MELLON-CORPORATION-AS40375 - The Bank of New York Mellon Corporation512

AS40442#11562 ARCUSTECH - Arcustech, LLC512

AS40467#11563 CREDORAX-ARIN1 - Credorax (USA) Inc.512

AS40471#11564 INCYTECORP - Incyte Corporation512

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