Autonomous System

AS53813

ZSCALER, INC.

ZSCALER, INC. United States 🌐 zscaler.com

Announced IPs

142,592

CIDR prefixes

165

ASN

AS53813

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 Zscaler

Zscaler, Inc. is an American cloud security company based in San Jose, California.

Founded

2008

Headquarters

San Jose

Industry

internet security

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

Network profile

Source: PeeringDB →

Network type Network Services

Geographic scope Regional

Traffic ratio Balanced

Peering policy Open

IRR record AS-ZSCALER-GLOBAL

Present at 33 internet exchanges: Equinix Sydney, JPIX TOKYO, Equinix Melbourne, Equinix Singapore, Extreme IX Chennai: Extreme IX LAN, Equinix Tokyo, DE-CIX Mumbai: DE-CIX Mumbai Peering LAN, HKIX: HKIX Peering LAN, Equinix Hong Kong, Extreme IX Mumbai: Extreme IX, …

Website ↗

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
164.137.160.0/19	8.2K	0.0%	ZSCALER, INC.	CH	—	—
101.2.192.0/20	4.1K	0.0%	ZSCALER, INC.	AU	—	—
101.2.224.0/20	4.1K	0.0%	ZSCALER, INC.	AU	New South Wales	Sydney
167.103.16.0/20	4.1K	2.5%	ZSCALER, INC.	AU	—	—
167.103.32.0/20	4.1K	2.1%	ZSCALER, INC.	AU	—	—
167.103.64.0/20	4.1K	0.0%	ZSCALER, INC.	AU	—	—
167.103.112.0/20	4.1K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
175.107.144.0/20	4.1K	0.0%	ZSCALER, INC.	AU	—	—
101.2.216.0/21	2.0K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
101.2.240.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
136.226.232.0/21	2.0K	0.0%	ZSCALER, INC.	US	—	—
147.161.192.0/21	2.0K	0.0%	ZSCALER, INC.	CH	—	—
147.161.208.0/21	2.0K	4.0%	ZSCALER, INC.	CH	—	—
167.103.8.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.40.0/21	2.0K	0.0%	ZSCALER, INC.	JP	Tokyo	Tokyo
167.103.56.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.72.0/21	2.0K	0.0%	ZSCALER, INC.	IN	Tamil Nadu	Chennai
167.103.80.0/21	2.0K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
167.103.96.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.136.0/21	2.0K	0.0%	ZSCALER, INC.	AU	New South Wales	Sydney
167.103.160.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.200.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.208.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.248.0/21	2.0K	0.0%	ZSCALER, INC.	AU	New South Wales	Sydney
175.107.136.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
175.107.160.0/21	2.0K	0.0%	ZSCALER, INC.	AU	—	—
205.220.16.0/21	2.0K	0.0%	ZSCALER, INC.	US	—	—
205.220.72.0/21	2.0K	0.0%	ZSCALER, INC.	US	—	—
101.2.216.0/22	1.0K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
101.2.252.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
136.226.228.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
136.226.240.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
136.226.252.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
137.31.136.0/22	1.0K	0.0%	ZSCALER, INC.	CH	—	—
137.31.172.0/22	1.0K	0.0%	ZSCALER, INC.	CH	—	—
147.161.212.0/22	1.0K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
147.161.216.0/22	1.0K	0.0%	ZSCALER, INC.	CH	—	—
164.137.56.0/22	1.0K	0.0%	ZSCALER, INC.	CH	—	—
165.225.104.0/22	1.0K	0.6%	ZSCALER, INC.	US	—	—
165.225.112.0/22	1.0K	0.5%	ZSCALER, INC.	US	—	—
165.225.120.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
165.225.228.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
165.225.232.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
167.103.4.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.20.0/22	1.0K	0.0%	ZSCALER, INC.	IN	Telangana	Hyderabad
167.103.24.0/22	1.0K	0.0%	ZSCALER, INC.	IN	Telangana	Hyderabad
167.103.32.0/22	1.0K	8.3%	ZSCALER, INC.	IN	Maharashtra	Mumbai
167.103.64.0/22	1.0K	0.0%	ZSCALER, INC.	SG	—	—
167.103.80.0/22	1.0K	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
167.103.84.0/22	1.0K	0.0%	ZSCALER, INC.	IN	Maharashtra	Mumbai
167.103.100.0/22	1.0K	0.0%	ZSCALER, INC.	AU	Western Australia	Perth
167.103.132.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.136.0/22	1.0K	0.0%	ZSCALER, INC.	IN	Maharashtra	Mumbai
167.103.144.0/22	1.0K	7.7%	ZSCALER, INC.	AU	New South Wales	Sydney
167.103.156.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.188.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.196.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.208.0/22	1.0K	0.0%	ZSCALER, INC.	IN	Tamil Nadu	Chennai
167.103.228.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
167.103.232.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
175.107.128.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
175.107.136.0/22	1.0K	0.0%	ZSCALER, INC.	SG	—	—
175.107.140.0/22	1.0K	0.0%	ZSCALER, INC.	IN	National Capital Territory of Delhi	New Delhi
175.107.172.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
175.107.176.0/22	1.0K	0.0%	ZSCALER, INC.	AU	—	—
175.107.184.0/22	1.0K	0.0%	ZSCALER, INC.	AU	New South Wales	Sydney
209.55.204.0/22	1.0K	0.0%	ZSCALER, INC.	US	—	—
101.2.202.0/23	512	0.0%	ZSCALER, INC.	JP	Tokyo	Tokyo
101.2.204.0/23	512	0.0%	ZSCALER, INC.	JP	Tokyo	Tokyo
101.2.208.0/23	512	0.0%	ZSCALER, INC.	AU	—	—
101.2.214.0/23	512	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
101.2.220.0/23	512	0.0%	ZSCALER, INC.	IN	National Capital Territory of Delhi	New Delhi
101.2.222.0/23	512	0.0%	ZSCALER, INC.	AU	New South Wales	Sydney
101.2.242.0/23	512	0.0%	ZSCALER, INC.	HK	—	—
101.2.244.0/23	512	0.0%	ZSCALER, INC.	IN	Tamil Nadu	Chennai
101.2.248.0/23	512	0.0%	ZSCALER, INC.	AU	—	—
129.127.226.0/23	512	0.0%	ZSCALER, INC.	AU	Victoria	Melbourne
136.226.222.0/23	512	0.0%	ZSCALER, INC.	US	—	—
136.226.224.0/23	512	0.0%	ZSCALER, INC.	US	—	—
136.226.228.0/23	512	0.0%	ZSCALER, INC.	HK	—	—
136.226.230.0/23	512	0.0%	ZSCALER, INC.	IN	National Capital Territory of Delhi	New Delhi
136.226.232.0/23	512	0.0%	ZSCALER, INC.	IN	Maharashtra	Mumbai
136.226.234.0/23	512	0.0%	ZSCALER, INC.	SG	—	—
136.226.236.0/23	512	0.0%	ZSCALER, INC.	SG	—	—
136.226.238.0/23	512	0.0%	ZSCALER, INC.	JP	Tokyo	Tokyo
136.226.240.0/23	512	0.0%	ZSCALER, INC.	TW	Taipei City	Taipei
136.226.242.0/23	512	0.0%	ZSCALER, INC.	IN	Tamil Nadu	Chennai
136.226.244.0/23	512	0.0%	ZSCALER, INC.	US	—	—
136.226.250.0/23	512	0.0%	ZSCALER, INC.	US	—	—
137.31.18.0/23	512	0.0%	ZSCALER, INC.	CH	—	—
137.31.92.0/23	512	0.0%	ZSCALER, INC.	CH	—	—
137.31.152.0/23	512	0.0%	ZSCALER, INC.	CH	—	—
137.31.172.0/23	512	0.0%	ZSCALER, INC.	IN	Maharashtra	Mumbai
137.83.144.0/23	512	1.2%	ZSCALER, INC.	US	—	—
137.83.150.0/23	512	1.6%	ZSCALER, INC.	US	—	—
137.83.184.0/23	512	1.2%	ZSCALER, INC.	US	—	—
137.83.188.0/23	512	0.6%	ZSCALER, INC.	US	—	—
147.161.200.0/23	512	3.9%	ZSCALER, INC.	CH	—	—
147.161.204.0/23	512	3.9%	ZSCALER, INC.	CH	—	—
147.161.208.0/23	512	0.4%	ZSCALER, INC.	AU	New South Wales	Sydney

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS53813 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
101.2.244.0/23	258,816	2026-11-13 11:37:13
165.225.228.0/23	245,454	2026-11-13 11:44:53
175.107.132.0/23	244,886	2026-11-13 11:44:53
167.103.96.0/23	244,678	2026-11-13 11:44:53
175.107.134.0/24	244,532	2026-11-13 11:44:53
168.183.183.0/24	244,321	2026-11-13 11:44:53
137.83.147.0/24	243,700	2026-11-13 11:44:53
165.225.228.0/24	241,531	2026-11-13 11:44:53
209.55.204.0/24	233,783	2026-11-13 11:36:02
167.103.70.0/23	231,480	2026-11-13 11:36:02
209.55.205.0/24	227,116	2026-11-13 11:36:02
167.103.204.0/23	220,573	2026-11-13 11:36:02
167.103.210.0/23	219,662	2026-11-13 11:36:02
167.103.76.0/23	219,648	2026-11-13 11:36:02
167.103.72.0/23	219,595	2026-11-13 11:37:24
167.103.206.0/23	218,875	2026-11-13 11:37:24
167.103.78.0/23	218,478	2026-11-13 11:37:27
167.103.208.0/23	218,170	2026-11-13 11:37:22
167.103.74.0/23	217,703	2026-11-13 11:37:20
209.55.150.0/24	211,710	2026-11-13 11:36:02
137.31.156.0/24	209,729	2026-11-13 09:19:24
101.2.215.0/24	171,484	2026-11-13 11:36:02
101.2.220.0/23	171,430	2026-11-13 11:36:02
101.2.240.0/24	169,701	2026-11-13 11:37:13
101.2.195.0/24	167,564	2026-11-13 11:36:02
101.2.198.0/24	160,421	2026-11-13 11:36:02
153.69.26.0/24	160,087	2026-11-13 11:44:53
136.226.252.0/23	150,216	2026-11-13 11:40:34
209.55.137.0/24	146,095	2026-11-13 11:36:02
209.55.130.0/24	143,239	2026-11-13 11:36:02
101.2.248.0/23	142,445	2026-11-13 11:36:03
167.103.26.0/23	138,535	2026-11-13 11:36:02
101.2.208.0/24	137,652	2026-11-13 11:37:16
168.183.193.0/24	136,976	2026-11-13 11:22:41
164.137.185.0/24	136,708	2026-11-13 11:36:02
101.2.197.0/24	136,628	2026-11-13 11:36:03
209.55.136.0/24	136,365	2026-11-13 11:36:02
209.55.169.0/24	136,330	2026-11-13 11:36:02
167.103.22.0/23	136,001	2026-11-13 11:36:02
167.103.228.0/23	135,535	2026-11-13 11:36:02
168.183.186.0/24	134,841	2026-11-13 11:36:02
167.103.30.0/23	134,640	2026-11-13 11:36:02
136.226.230.0/23	134,132	2026-11-13 11:36:03
164.137.189.0/24	132,647	2026-11-13 11:36:02
167.103.88.0/23	132,633	2026-11-13 11:36:02
164.137.188.0/24	132,388	2026-11-13 11:36:02
175.107.142.0/23	132,321	2026-11-13 11:37:12
164.137.187.0/24	132,136	2026-11-13 11:36:02
164.137.186.0/24	131,903	2026-11-13 11:36:02
167.103.4.0/23	131,635	2026-11-13 11:37:24

Showing top 50 of 378 announced prefixes by sample volume.

Frequently Asked Questions

What is AS53813?

AS53813 is an Autonomous System Number assigned to ZSCALER, 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 AS53813 announce?

AS53813 announces 142.6K IPv4 addresses distributed across 165 routed CIDR prefixes. The network is registered in United States.

Who operates AS53813?

AS53813 is operated by ZSCALER, INC.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS53813 registered in?

AS53813 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: 2026-11-13 11:54:05 UTC