AS16417 Cisco Systems Ironport Division

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

IPv4 addresses29,95252 prefixes · <0.001% of announced IPv4

Rank in United States#1,805largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,023of 79,396 networks with IPv4

IPv611 x /489 prefixes

CountryUnited States18,679 ASNs registered there

Open AS16417 in ASN lookup Look up an IP in this network (23.90.96.1) All networks in United States

IPv4 prefixes

All 52 prefixes, in address order.

23.90.96.0/22
23.90.100.0/23
23.90.103.0/24
23.90.112.0/23
23.90.121.0/24
23.90.124.0/22
63.251.108.0/24
68.232.128.0/22
68.232.134.0/23
68.232.136.0/23
68.232.140.0/22
68.232.144.0/22
68.232.148.0/23
68.232.153.0/24
68.232.154.0/23
68.232.157.0/24
68.232.158.0/24
72.5.10.0/23
74.201.90.0/23
74.201.116.0/24
139.138.24.0/22
139.138.32.0/22
139.138.38.0/23
139.138.40.0/23
139.138.46.0/23
139.138.56.0/22
184.94.240.0/23
184.94.248.0/22
184.94.254.0/24
194.165.195.0/24
194.165.196.0/24
194.165.211.0/24
194.165.212.0/24
204.15.80.0/24
207.54.73.0/24
207.54.74.0/24
207.54.80.0/23
207.54.82.0/24
207.54.84.0/22
207.54.92.0/22
208.90.56.0/23
208.90.58.0/24
208.90.60.0/24
208.90.62.0/23
216.71.128.0/21
216.71.137.0/24
216.71.138.0/24
216.71.140.0/22
216.71.144.0/22
216.71.148.0/23
216.71.150.0/24
216.71.152.0/22

IPv6 prefixes

All 9 prefixes.

2620:101:2001::/48
2620:101:2002::/47
2620:101:2005::/48
2620:101:2006::/47
2620:101:200b::/48
2620:101:200c::/48
2620:101:200f::/48
2620:101:2010::/48
2620:101:2014::/48

Other ASNs named Cisco Systems Ironport Division

3 other networks use the same organisation name; together with AS16417 they announce 49,664 IPv4 addresses.

ASNNameIPv4 addresses

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

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

AS40427IRONPORT-SYSTEMS-CI365 - Cisco Systems Ironport Division US512

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ASNNameIPv4 addresses

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AS30688#1803 FASTTRACK-NET-AS - FastTrack Communications Inc.29,952

AS62468#1804 HKCLOUDX - VpsQuan L.L.C.29,952

AS13672#1806 FAIRPO-3 - Fidium29,952

AS33152#1807 KCEC-ASN - Kit Carson Electric Cooperative, Inc29,696

AS399065#1808 DEFASTLINK - Dixie EPA29,696

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