AS109 — CISCOSYSTEMS

AS109 announces 28 IPv4 prefixes covering 1,141,504 addresses and 1 IPv6 prefixes.

About this network

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.

Announced prefixes

• 12.5.186.0/23
• 12.19.88.0/21
• 12.159.148.0/22
• 64.100.0.0/14
• 64.104.0.0/16
• 66.187.208.0/20
• 72.163.0.0/16
• 103.60.32.0/22
• 111.223.8.0/22
• 128.107.0.0/16
• 144.254.0.0/16
• 161.44.0.0/16
• 171.68.0.0/14
• 173.36.0.0/15
• 173.38.0.0/16
• 173.39.0.0/17
• 173.39.128.0/18
• 173.39.192.0/19
• 192.118.76.0/22
• 192.133.192.0/19
• 192.133.224.0/20
• 192.133.240.0/22
• 192.135.250.0/24
• 198.133.219.0/24
• 198.135.0.0/21
• 204.69.198.0/23
• 204.69.200.0/24
• 216.128.32.0/19
• 2001:420::/32

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS3491 PCCW Global (HK) Ltd.
• AS9498 BHARTI Airtel Ltd.
• AS4637 Telstra Global
• AS1221 Telstra Limited
• AS701 Verizon Business
• AS1299 Arelion Sweden AB
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS4657 StarHub Ltd
• AS4812 China Telecom (Group)
• AS1680 Cellcom Fixed Line Communication L.P
• AS17621 China Unicom Shanghai network
• AS2764 AAPT Limited
• AS8551 Bezeq International Ltd.
• AS7018 AT&T Enterprises, LLC
• AS7473 Singapore Telecommunications Ltd
• AS11164 Internet2

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS3491 PCCW Global (HK) Ltd.
• AS9498 BHARTI Airtel Ltd.
• AS4637 Telstra Global
• AS1221 Telstra Limited
• AS701 Verizon Business
• AS1299 Arelion Sweden AB
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS4657 StarHub Ltd
• AS4812 China Telecom (Group)
• AS1680 Cellcom Fixed Line Communication L.P
• AS17621 China Unicom Shanghai network
• AS2764 AAPT Limited
• AS8551 Bezeq International Ltd.
• AS7018 AT&T Enterprises, LLC
• AS7473 Singapore Telecommunications Ltd
• AS11164 Internet2

Internet exchanges

• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Equinix Internet Exchange Singapore — Singapore, Singapore
• Equinix Internet Exchange Ashburn — Ashburn, United States
• DE-CIX Mumbai — Mumbai, India
• Equinix Internet Exchange Sydney — Sydney, Australia
• Equinix Internet Exchange Dallas — Dallas, United States
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• Equinix Internet Exchange Tokyo — Tokyo, Japan