Autonomous system
AS109 CISCOSYSTEMS
Unclassified ARIN
Summary
Cisco Systems, Inc.
corporate enterprise legacy
The corporate network of Cisco Systems, the networking-hardware giant, on one of the internet's early low-numbered ASNs.
What it's used for
- Cisco's own global corporate infrastructure — offices, labs, and internet- facing services, not a commercial transit or hosting product.
Notable
- Addresses here belong to Cisco the company; they are not customer networks.
- The low AS number (109) dates to Cisco's early presence on the internet, which is fitting given the company builds much of the world's routing hardware.
Interesting
- Cisco's routers and the BGP they speak are the machinery underneath most of the other ASNs in this list.
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
Recorded at 9 exchanges in 7 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.227.143 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.211.50 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.194 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.237.85 |
| DE-CIX Mumbai | Mumbai, India | 103.27.171.197 |
| Equinix Internet Exchange Sydney | Sydney, Australia | 45.127.172.226 |
| Equinix Internet Exchange Dallas | Dallas, United States | 206.223.118.166 |
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.116.53 |
Transit providers
18 upstream, 0 downstream and 31 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 78 prefixes · 1.14M addresses IPv6 54 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 132 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS109- Registry name
- CISCOSYSTEMS
- Registrant
- CISCO SYSTEMS, INC.
- Abuse contact
- csirt-notify@cisco.com
- Registered
- 1987-05-06
- Last changed
- 2023-09-12
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 97% valid · 138 valid, 4 with no ROA
- ROAs
- 22 authorising AS109
- ASPA
- no ASPA record
- IRR
- 99.3% registered · 141 of 142 announcements
- Route objects
- 296 naming AS109
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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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