Autonomous system
AS40427 IRONPORT-SYSTEMS-CI365 - Cisco Systems Ironport Division
Unclassified ARIN
Summary
Cisco IronPort
security business cisco legacy
The AS handle IRONPORT-SYSTEMS-CI365 is held by Cisco Systems Ironport Division.
What it's used for
- The space carries corporate infrastructure for Cisco's IronPort security division, identified by the netname
US-CISCO1-19960205and registrantCisco Systems, Inc. - The inventory consists of 512 IPv4 addresses within a single prefix, 194.165.198.0/23, with 1 observed neighbour, indicating a small, isolated corporate estate rather than a transit or access network.
- Traffic from this AS represents internal corporate endpoints and security appliances for Cisco's IronPort business unit, which provides email security and web security solutions.
Notable
- The registrant
Cisco Systems, Inc.aligns with the announcer, confirming the space is owned by the parent company. - IronPort Systems was acquired by Cisco Systems, and this AS represents the legacy address space retained for the division's operations.
- The address inventory is a single /23 block, a compact allocation typical for a specific corporate division rather than a broad service provider.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS16417 | Cisco Systems Ironport Division | 118 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS40427- Registry name
- IRONPORT-SYSTEMS-CI365
- Registrant
- Cisco Systems Ironport Division
- Abuse contact
- netops-ironport@cisco.com
- Registered
- 2007-02-16
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS40427
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 6 naming AS40427
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 449 networks and 1,846 prefixes, as published 2026-11-02. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere