Autonomous system
AS53813 ZSCALER-INC
Business ARIN
Summary
Zscaler, Inc.
security sase proxy
One of Zscaler's Autonomous Systems (ZSCALER-INC). 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
- Previously catalogued as hosting; it is reclassified as business because what transits it is corporate end-user browsing behind a multi-tenant proxy, not datacenter servers.
- Related Zscaler networks: AS22616 ZSCALER-SJC1, AS32921 ZSCALER-NEWYORK, AS40384 ZSCALER-GRX, AS53444 ZSCALER-SJC, AS62044 ZSCALER-EMEA, and AS62907 ZSCALER-CORP.
Interesting
- One shared egress carries thousands of distinct users, so an IP here maps to any of many customer orgs rather than one identifiable company.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 32 exchanges in 9 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.231.23 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.90.89 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.90.70 |
| JPIX Tokyo | Tokyo, Japan | 210.171.225.133 |
| DE-CIX Mumbai | Mumbai, India | 103.27.170.13 |
| Singapore Internet Exchange | Singapore, Singapore | 103.16.103.92 |
| Extreme IX Mumbai | Mumbai, India | 103.77.108.28 |
| Equinix Internet Exchange Sydney | Sydney, Australia | 45.127.172.14 |
Transit providers
28 upstream, 0 downstream and 47 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 167 prefixes · 141K addresses IPv6 17 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 184 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS53813- Registry name
- ZSCALER-INC
- Registrant
- ZSCALER, INC.
- Abuse contact
- poc-abuse@zscaler.com
- Registered
- 2011-06-03
- Last changed
- 2013-04-23
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 97% valid · 390 valid, 11 with no ROA
- ROAs
- 411 authorising AS53813
- ASPA
- no ASPA record
- IRR
- 99.5% registered · 399 of 401 announcements
- Route objects
- 11,905 naming AS53813
Reputation
Classification and threat
Business Corporate network, or multi-tenant SASE egress carrying staff browsing.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere