Autonomous System

AS109

CISCO SYSTEMS, INC.

CISCO SYSTEMS, INC. United States 🌐 cisco.com

Announced IPs

1,141,504

CIDR prefixes

ASN

AS109

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

69/100

Moderate

How this score is built

Baseline (neutral) 65
Enterprise allocation +4
Trust score 69 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

About Cisco

Cisco Systems, Inc., doing business as Cisco, is an American multinational technology conglomerate corporation that develops, manufactures, and sells hardware, software, telecommunications equipment and other high-technology services and products focused on networking, cybersecurity and AI. Cisco specializes in specific tech markets, such as the Internet of things (IoT), domain security, videoconferencing, and energy management, including products such as Webex, OpenDNS, Jabber, and Jasper.

Founded

1984

Headquarters

San Jose

Industry

telecommunications industry

Employees

66,639

Official website ↗ Summary from Wikipedia, CC BY-SA 4.0 · Data from Wikidata

Network profile

Source: PeeringDB →

Network type Enterprise

Geographic scope Global

Traffic ratio Balanced

Peering policy Selective

IRR record AS-CISCO

Present at 9 internet exchanges: Equinix Dallas, Equinix Ashburn, Equinix Tokyo, AMS-IX, Equinix San Jose, Equinix Singapore, Equinix Sydney, LINX LON1: Main, DE-CIX Mumbai: DE-CIX Mumbai Peering LAN

Website ↗

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
64.100.0.0/14	262.1K	6.5%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
171.68.0.0/14	262.1K	2.7%	CISCO SYSTEMS, INC.	US	California	San Jose
64.100.0.0/15	131.1K	6.8%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
173.36.0.0/15	131.1K	9.8%	CISCO SYSTEMS, INC.	US	California	San Jose
64.102.0.0/16	65.5K	10.4%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
64.104.0.0/16	65.5K	6.2%	CISCO SYSTEMS, INC.	US	—	—
72.163.0.0/16	65.5K	14.5%	CISCO SYSTEMS, INC.	US	California	San Jose
128.107.0.0/16	65.5K	4.3%	CISCO SYSTEMS, INC.	US	California	San Jose
144.254.0.0/16	65.5K	7.1%	CISCO SYSTEMS, INC.	US	—	—
161.44.0.0/16	65.5K	3.1%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
173.38.0.0/16	65.5K	12.7%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
64.103.128.0/17	32.8K	1.0%	CISCO SYSTEMS, INC.	IN	Karnataka	Bengaluru
72.163.0.0/17	32.8K	9.7%	CISCO SYSTEMS, INC.	US	California	San Jose
128.107.128.0/17	32.8K	6.7%	CISCO SYSTEMS, INC.	US	—	—
173.38.0.0/17	32.8K	22.4%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
173.38.128.0/17	32.8K	3.1%	CISCO SYSTEMS, INC.	NL	—	—
173.39.0.0/17	32.8K	7.1%	CISCO SYSTEMS, INC.	US	California	San Jose
64.104.0.0/18	16.4K	15.5%	CISCO SYSTEMS, INC.	JP	Tokyo	Tokyo
64.104.192.0/18	16.4K	5.2%	CISCO SYSTEMS, INC.	AU	New South Wales	St Leonards
72.163.128.0/18	16.4K	8.2%	CISCO SYSTEMS, INC.	IN	—	—
128.107.64.0/18	16.4K	3.2%	CISCO SYSTEMS, INC.	US	—	—
173.39.0.0/18	16.4K	0.5%	CISCO SYSTEMS, INC.	IN	—	—
173.39.128.0/18	16.4K	0.1%	CISCO SYSTEMS, INC.	US	California	San Jose
64.103.0.0/19	8.2K	1.7%	CISCO SYSTEMS, INC.	NL	Flevoland	Almere Stad
64.103.64.0/19	8.2K	2.7%	CISCO SYSTEMS, INC.	GB	England	City of London
64.104.64.0/19	8.2K	0.9%	CISCO SYSTEMS, INC.	US	—	—
64.104.96.0/19	8.2K	0.8%	CISCO SYSTEMS, INC.	JP	—	—
64.104.128.0/19	8.2K	2.8%	CISCO SYSTEMS, INC.	IN	Karnataka	Bengaluru
64.104.160.0/19	8.2K	3.9%	CISCO SYSTEMS, INC.	JP	—	—
72.163.192.0/19	8.2K	44.2%	CISCO SYSTEMS, INC.	IN	—	—
128.107.32.0/19	8.2K	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.64.0/19	8.2K	25.2%	CISCO SYSTEMS, INC.	IN	—	—
173.39.192.0/19	8.2K	0.7%	CISCO SYSTEMS, INC.	US	California	San Jose
192.133.192.0/19	8.2K	0.0%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
216.128.32.0/19	8.2K	2.8%	CISCO SYSTEMS, INC.	US	—	—
64.103.48.0/20	4.1K	0.3%	CISCO SYSTEMS, INC.	NL	Flevoland	Almere Stad
64.103.96.0/20	4.1K	1.8%	CISCO SYSTEMS, INC.	GB	England	City of London
64.103.112.0/20	4.1K	12.3%	CISCO SYSTEMS, INC.	NL	Flevoland	Almere Stad
66.187.208.0/20	4.1K	0.0%	CISCO SYSTEMS, INC.	US	Texas	Allen
72.163.224.0/20	4.1K	30.2%	CISCO SYSTEMS, INC.	JP	—	—
173.39.96.0/20	4.1K	1.6%	CISCO SYSTEMS, INC.	US	California	San Jose
173.39.208.0/20	4.1K	0.0%	CISCO SYSTEMS, INC.	US	—	—
192.133.224.0/20	4.1K	0.0%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
12.19.88.0/21	2.0K	0.0%	CISCO SYSTEMS, INC.	US	Texas	Richardson
64.103.32.0/21	2.0K	2.7%	CISCO SYSTEMS, INC.	NL	Flevoland	Almere Stad
64.103.40.0/21	2.0K	2.1%	CISCO SYSTEMS, INC.	GB	England	City of London
128.107.0.0/21	2.0K	0.5%	CISCO SYSTEMS, INC.	US	—	—
173.39.192.0/21	2.0K	1.8%	CISCO SYSTEMS, INC.	JP	—	—
198.135.0.0/21	2.0K	3.9%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
12.159.148.0/22	1.0K	1.0%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
72.163.244.0/22	1.0K	3.8%	CISCO SYSTEMS, INC.	JP	—	—
72.163.248.0/22	1.0K	5.3%	CISCO SYSTEMS, INC.	CN	—	—
72.163.252.0/22	1.0K	0.8%	CISCO SYSTEMS, INC.	JP	—	—
103.60.32.0/22	1.0K	0.0%	CISCO SYSTEMS, INC.	CN	Shanghai	Shanghai
111.223.8.0/22	1.0K	0.0%	CISCO SYSTEMS, INC.	CN	Shanghai	Shanghai
128.107.28.0/22	1.0K	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.124.0/22	1.0K	0.2%	CISCO SYSTEMS, INC.	SG	—	—
173.39.204.0/22	1.0K	0.9%	CISCO SYSTEMS, INC.	US	—	—
192.118.76.0/22	1.0K	0.0%	CISCO SYSTEMS, INC.	IL	Central District	Netanya
192.133.240.0/22	1.0K	0.0%	CISCO SYSTEMS, INC.	US	North Carolina	Morrisville
12.5.186.0/23	512	0.0%	CISCO SYSTEMS, INC.	US	Texas	Richardson
72.163.240.0/23	512	0.0%	CISCO SYSTEMS, INC.	CN	—	—
72.163.242.0/23	512	0.0%	CISCO SYSTEMS, INC.	JP	—	—
128.107.8.0/23	512	1.0%	CISCO SYSTEMS, INC.	GB	—	—
128.107.10.0/23	512	1.4%	CISCO SYSTEMS, INC.	NL	—	—
128.107.12.0/23	512	3.3%	CISCO SYSTEMS, INC.	IL	—	—
128.107.14.0/23	512	0.4%	CISCO SYSTEMS, INC.	IN	—	—
128.107.16.0/23	512	0.0%	CISCO SYSTEMS, INC.	US	—	—
128.107.20.0/23	512	0.4%	CISCO SYSTEMS, INC.	JP	—	—
128.107.22.0/23	512	0.6%	CISCO SYSTEMS, INC.	AU	—	—
128.107.24.0/23	512	0.8%	CISCO SYSTEMS, INC.	CN	—	—
128.107.26.0/23	512	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.112.0/23	512	10.4%	CISCO SYSTEMS, INC.	SG	—	—
173.39.114.0/23	512	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.116.0/23	512	3.3%	CISCO SYSTEMS, INC.	SG	—	—
173.39.200.0/23	512	0.0%	CISCO SYSTEMS, INC.	CN	—	—
173.39.202.0/23	512	2.9%	CISCO SYSTEMS, INC.	US	—	—
204.69.198.0/23	512	21.3%	CISCO SYSTEMS, INC.	US	California	San Jose
128.107.18.0/24	256	3.9%	CISCO SYSTEMS, INC.	SG	—	—
128.107.19.0/24	256	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.118.0/24	256	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.119.0/24	256	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.120.0/24	256	12.5%	CISCO SYSTEMS, INC.	SG	—	—
173.39.122.0/24	256	0.0%	CISCO SYSTEMS, INC.	US	—	—
173.39.123.0/24	256	0.0%	CISCO SYSTEMS, INC.	SG	—	—
192.135.250.0/24	256	1.6%	CISCO SYSTEMS, INC.	US	Texas	Allen
198.133.219.0/24	256	57.8%	CISCO SYSTEMS, INC.	US	California	San Jose
204.69.200.0/24	256	0.0%	CISCO SYSTEMS, INC.	US	California	San Jose
173.39.121.128/25	128	3.1%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.0/26	64	3.1%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.96/27	32	3.1%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.80/28	16	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.72/29	8	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.64/30	4	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.68/31	2	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.70/32	1	0.0%	CISCO SYSTEMS, INC.	SG	—	—
173.39.121.71/32	1	0.0%	CISCO SYSTEMS, INC.	US	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS109 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

Prefix	Announcement samples	Last seen
72.163.192.0/19	133,915	2026-11-02 15:29:17
64.104.128.0/19	130,019	2026-11-02 15:29:17
64.103.128.0/17	129,901	2026-11-02 15:29:17
72.163.128.0/18	129,482	2026-11-02 15:29:17
128.107.14.0/23	90,550	2026-11-02 15:29:17
173.39.64.0/19	88,090	2026-11-02 15:29:17
173.39.0.0/18	87,859	2026-11-02 15:29:17
111.223.8.0/22	44,541	2026-11-02 15:09:56
173.39.152.0/21	42,053	2026-11-02 15:29:17
173.39.144.0/21	41,822	2026-11-02 15:29:17
128.107.54.0/23	41,704	2026-11-02 15:29:17
128.107.20.0/23	41,607	2026-11-02 15:29:17
173.39.160.0/19	41,605	2026-11-02 15:29:17
173.39.128.0/19	41,602	2026-11-02 15:29:17
173.39.192.0/20	41,583	2026-11-02 15:29:17
72.163.224.0/19	40,649	2026-11-02 15:29:17
64.104.206.0/23	40,431	2026-11-02 15:29:17
64.104.192.0/18	40,247	2026-11-02 15:29:17
64.104.96.0/19	40,244	2026-11-02 15:29:17
64.104.0.0/18	40,236	2026-11-02 15:29:17
64.104.204.0/23	40,184	2026-11-02 15:29:17
64.104.160.0/19	40,123	2026-11-02 15:29:17
64.104.124.0/24	40,084	2026-11-02 15:29:17
64.104.64.0/19	37,853	2026-11-02 15:29:17
173.39.96.0/19	36,756	2026-11-02 15:29:17
128.107.18.0/23	36,468	2026-11-02 15:29:17
64.103.0.0/17	31,147	2026-11-02 15:20:46
66.187.208.0/20	30,973	2026-11-02 15:29:52
173.36.0.0/17	30,805	2026-11-02 15:29:52
173.37.128.0/19	30,773	2026-11-02 15:29:52
192.135.250.0/24	30,772	2026-11-02 15:29:52
173.37.145.0/24	30,771	2026-11-02 15:29:52
72.163.248.0/22	30,766	2026-11-02 15:09:56
173.37.16.0/20	30,740	2026-11-02 15:29:52
128.107.4.0/23	30,701	2026-11-02 15:29:52
12.19.88.0/21	30,615	2026-11-02 15:29:52
128.107.10.0/23	30,336	2026-11-02 15:29:30
72.163.240.0/23	30,276	2026-11-02 15:09:56
144.254.0.0/16	30,224	2026-11-02 15:30:28
173.39.200.0/23	29,993	2026-11-02 15:09:56
173.38.128.0/17	29,702	2026-11-02 15:32:44
72.163.80.0/20	27,950	2026-11-02 15:29:52
128.107.22.0/23	27,924	2026-11-02 15:29:17
216.128.32.0/19	26,954	2026-11-02 15:40:55
128.107.38.0/23	26,638	2026-11-02 15:01:58
128.107.6.0/23	26,624	2026-11-02 15:01:58
12.159.148.0/22	24,482	2026-11-02 14:24:25
128.107.12.0/23	24,405	2026-11-02 15:29:52
64.100.0.0/16	24,201	2026-11-02 15:20:46
64.101.0.0/18	24,159	2026-11-02 15:20:46

Showing top 50 of 96 announced prefixes by sample volume.

Frequently Asked Questions

What is AS109?

AS109 is an Autonomous System Number assigned to CISCO SYSTEMS, INC.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS109 announce?

AS109 announces 1.14M IPv4 addresses distributed across 28 routed CIDR prefixes. The network is registered in United States.

Who operates AS109?

AS109 is operated by CISCO SYSTEMS, INC.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS109 registered in?

AS109 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-11-02 15:54:05 UTC