AS53444 — ZSCALER-SJC

Network type: business

AS53444 announces 2 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

One of Zscaler's Autonomous Systems (ZSCALER-SJC). Zscaler runs a global cloud security platform (SASE / Secure Web Gateway) that enterprise traffic is routed through on its way to the internet, so an IP here is a security-proxy egress, not a datacenter server or an end user's own address.

What it's used for

• Egress for Zscaler Internet Access (ZIA) — inspecting and filtering outbound web traffic for corporate customers from cloud enforcement nodes.
• Zero-trust access to private apps (Zscaler Private Access, ZPA).

Notable

• The real user sits behind this address inside a corporate tenant; one shared egress carries the traffic of many distinct customer employees.
• This is a San Jose node (sibling of the much busier SJC1, AS22616) and announces only a small block. Where it carries traffic, Zscaler routes each user to their nearest node, so an egress here corresponds to corporate users in western North America.
• Zscaler announces from several ASNs across its regions. Related Zscaler networks you may encounter: AS22616 ZSCALER-SJC1, AS32921 ZSCALER-NEWYORK, AS40384 ZSCALER-GRX, AS53813 ZSCALER-INC, AS62044 ZSCALER-EMEA, and AS62907 ZSCALER-CORP.

Interesting

• Because so many enterprises route through Zscaler, its egress IPs can surface in threat feeds purely by volume — the traffic is aggregated, not malicious.

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

Announced prefixes

• 8.25.203.0/24
• 199.168.148.0/24

Upstream networks

• AS6461 Zayo Bandwidth

Adjacent networks

• AS6461 Zayo Bandwidth