AS22616 — ZSCALER-SJC1

Network type: business

AS22616 announces 279 IPv4 prefixes covering 488,704 addresses and 23 IPv6 prefixes.

About this network

Zscaler's ZSCALER-SJC1 network — one of the company's busiest enforcement ASNs, at its San Jose region. Zscaler operates a global cloud security platform (SASE / Secure Web Gateway) that enterprise traffic is routed through on its way to the internet.

What it's used for

• Inspecting and filtering outbound web traffic for corporate customers (Zscaler Internet Access) from cloud enforcement nodes worldwide.
• Zero-trust access to private apps (Zscaler Private Access).

Notable

• An IP in Zscaler's space is typically a security proxy egress, not a datacenter server or an end user's own address — the real user sits behind it inside a corporate tenant.
• The node name hints at the user's region. Zscaler routes each user to their nearest enforcement node, so an active egress's location roughly tracks where the traffic originates. This SJC1 (San Jose) block is one of Zscaler's busiest actively-announcing ASNs and generally corresponds to corporate users in western North America (US, Canada, Mexico); the EMEA ASN (AS62044) covers Europe / Middle East / Africa. Note that several sibling ASNs below (NEWYORK, ATLANTA, GRX) currently announce no IP space — reserved/placeholder handles, not live egress.
• Zscaler announces from several ASNs, so 22616 is one of several you may encounter: AS32921 ZSCALER-NEWYORK, AS40384 ZSCALER-GRX, AS53444 ZSCALER-SJC, AS53813 ZSCALER-INC, AS55242 ZSCALER-ATLANTA, AS62044 ZSCALER-EMEA, and AS62907 ZSCALER-CORP.

Interesting

• Because so many enterprises route through Zscaler, its egress IPs can appear in threat feeds purely due to volume — one shared egress carries thousands of distinct users.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 8.34.34.0/24
• 8.35.35.0/24
• 64.215.22.0/24
• 70.39.159.0/24
• 70.40.176.0/23
• 70.40.178.0/24
• 87.58.106.0/24
• 87.58.120.0/23
• 87.58.126.0/23
• 89.18.89.0/24
• 89.18.90.0/24
• 101.2.210.0/23
• 101.2.212.0/23
• 104.129.192.0/20
• 128.177.125.0/24
• 128.177.129.0/24
• 128.177.135.0/24
• 128.177.136.0/24
• 129.176.208.0/22
• 136.226.0.0/20
• 136.226.16.0/22
• 136.226.20.0/23
• 136.226.22.0/24
• 136.226.24.0/21
• 136.226.32.0/21
• 136.226.40.0/23
• 136.226.42.0/24
• 136.226.44.0/22
• 136.226.48.0/20
• 136.226.64.0/20
• 136.226.80.0/21
• 136.226.88.0/24
• 136.226.90.0/23
• 136.226.92.0/22
• 136.226.96.0/19
• 136.226.128.0/20
• 136.226.144.0/21
• 136.226.152.0/22
• 136.226.186.0/23
• 136.226.188.0/23
• 136.226.200.0/21
• 136.226.208.0/22
• 136.226.212.0/23
• 136.226.226.0/23
• 136.226.248.0/23
• 137.31.4.0/22
• 137.31.8.0/22
• 137.31.14.0/23
• 137.31.24.0/21
• 137.31.39.0/24
• 137.31.49.0/24
• 137.31.51.0/24
• 137.31.54.0/23
• 137.31.56.0/23
• 137.31.60.0/23
• 137.31.64.0/20
• 137.31.80.0/21
• 137.31.88.0/23
• 137.31.99.0/24
• 137.31.100.0/22
• 137.31.104.0/21
• 137.31.114.0/23
• 137.31.116.0/23
• 137.31.119.0/24
• 137.31.120.0/21
• 137.31.128.0/23
• 137.31.134.0/23
• 137.31.141.0/24
• 137.31.142.0/23
• 137.31.144.0/21
• 137.31.154.0/23
• 137.31.157.0/24
• 137.31.158.0/24
• 137.31.160.0/22
• 137.31.167.0/24
• 137.31.168.0/24
• 137.31.170.0/23
• 137.31.176.0/20
• 137.31.198.0/23
• 137.31.200.0/21
• 137.31.208.0/24
• 137.31.210.0/23
• 137.31.212.0/22
• 137.31.216.0/21
• 137.31.224.0/20
• 137.31.240.0/21
• 137.31.248.0/22
• 137.31.252.0/23
• 137.31.254.0/24
• 137.83.131.0/24
• 137.83.132.0/23
• 137.83.136.0/24
• 137.83.141.0/24
• 137.83.143.0/24
• 137.83.146.0/24
• 137.83.154.0/23
• 137.83.157.0/24
• 137.83.161.0/24
• 137.83.165.0/24
• 137.83.166.0/23

and 202 more.

Upstream networks

• AS1299 Arelion Sweden AB
• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS7195 EDGEUNO S.A.S
• AS32098 Transtelco Inc
• AS24482 SG.GS
• AS293 ESnet
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS37721 Virtual Technologies & Solutions
• AS22652 Videotron Ltee
• AS2152 CENIC
• AS57463 NetIX Communications JSC
• AS12956 TELEFONICA GLOBAL SOLUTIONS SL
• AS577 Bell Canada
• AS14907 Wikimedia Foundation Inc.
• AS971 PureVoltage Hosting Inc.
• AS394256 Tech Futures Interactive Inc.
• AS7575 Australian Academic and Research Network (AARNet)
• AS9002 RETN Limited
• AS1403 EBOX
• AS17639 Converge ICT Solutions Inc.
• AS25091 IP-Max SA
• AS3130 RGnet OU

Downstream networks

• AS62907 ZSCALER, INC.

Adjacent networks

• AS1299 Arelion Sweden AB
• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS7195 EDGEUNO S.A.S
• AS32098 Transtelco Inc
• AS24482 SG.GS
• AS293 ESnet
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS37721 Virtual Technologies & Solutions
• AS22652 Videotron Ltee
• AS2152 CENIC
• AS57463 NetIX Communications JSC
• AS12956 TELEFONICA GLOBAL SOLUTIONS SL
• AS577 Bell Canada
• AS14907 Wikimedia Foundation Inc.
• AS971 PureVoltage Hosting Inc.
• AS394256 Tech Futures Interactive Inc.
• AS7575 Australian Academic and Research Network (AARNet)
• AS9002 RETN Limited
• AS1403 EBOX
• AS17639 Converge ICT Solutions Inc.
• AS25091 IP-Max SA
• AS3130 RGnet OU

Internet exchanges

• IX.br (PTT.br) São Paulo — São Paulo, Brazil
• Equinix Internet Exchange Ashburn — Ashburn, United States
• Seattle Internet Exchange — Seattle, United States
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• Toronto Internet Exchange — Toronto, Canada
• DE-CIX New York — New York, United States
• Equinix Internet Exchange Chicago — Chicago, United States
• Equinix Internet Exchange Dallas — Dallas, United States
• New York International Internet Exchange — New York, United States
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• FL-IX - The Florida Internet Exchange / Community IX - Florida — Miami, United States
• Equinix Internet Exchange Miami — Miami, United States
• DE-CIX Dallas — Dallas, United States
• Digital Realty Atlanta Internet Exchange — Atlanta, United States
• PIT Chile - Santiago — Santiago, Chile
• Equinix Internet Exchange New York — New York, United States
• CANIX Internet Exchange - Montreal — Montreal, Canada
• DE-CIX Chicago — Chicago, United States
• Vancouver Internet Exchange — Vancouver, Canada
• Massachusetts Internet Exchange — Boston, United States
• Equinix IBX Secaucus — Secaucus, United States
• PIT MX — Querétaro, Mexico
• Equinix-LA(former Paix) — Los Angeles, United States