AS16417 — IRONPORT-SYSTEMS-INC

AS16417 announces 52 IPv4 prefixes covering 29,952 addresses and 9 IPv6 prefixes.

About this network

One reverse name carries a hotel chain's brand, because the machine filters that chain's mail.

What it's used for

• A mail security service's network. Sixty prefixes announced from the United States, eight of them IPv6, twenty-nine thousand nine hundred and fifty-two addresses, through eighteen observed BGP neighbours.

Notable

• The AS handle is the acquired company's name with its legal form attached. The holder field names the parent and calls it a division, so the record holds both the company that was bought and the one that bought it.
• Most blocks share one netname: four letters cut from the parent and the acquisition, then a numeral. Three more use the acquired brand and two letters, and one adds the word for a network before its numeral.
• Three of eighteen queried addresses answered, all on a fourth domain that appears nowhere in the registry record.
• Two of those names begin with three letters for a mail security appliance, then a customer reference built from two letters and two numbers, one of them also carrying a state code.
• The third replaces that reference with a hotel chain's brand outright.

Interesting

• Running mail security for other companies means their names end up in your reverse zone. A recipient checking where a message came from sees the appliance, the provider, and sometimes the customer.
• Sixty prefixes and thirty thousand addresses for a filtering service is about reputation rather than capacity. Addresses that send mail have to be many, stable, and separable, so one customer's trouble does not sink another's delivery.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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
• 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

Upstream networks

• AS12182 Unitas Global
• AS23005 SWITCH, LTD
• AS22911 SINAP-TIX, LLC
• AS174 Cogent Communications, LLC
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS6939 Hurricane Electric LLC
• AS209 CenturyLink Communications, LLC
• AS6327 Shaw Communications
• AS24482 SG.GS
• AS22652 Videotron Ltee
• AS394256 Tech Futures Interactive Inc.

Downstream networks

• AS40427 Cisco Systems Ironport Division

Adjacent networks

• AS23005 SWITCH, LTD
• AS12182 Unitas Global
• AS174 Cogent Communications, LLC
• AS22911 SINAP-TIX, LLC
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS6939 Hurricane Electric LLC
• AS209 CenturyLink Communications, LLC
• AS6327 Shaw Communications
• AS40427 Cisco Systems Ironport Division
• AS24482 SG.GS
• AS22652 Videotron Ltee
• AS394256 Tech Futures Interactive Inc.

Internet exchanges

• Toronto Internet Exchange — Toronto, Canada
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States