% APNIC found the following authoritative answer from: whois.arin.net

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

NetRange:       165.225.0.0 - 165.225.127.255
CIDR:           165.225.0.0/17
NetName:        ZSCAL
NetHandle:      NET-165-225-0-0-1
Parent:         NET165 (NET-165-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   ZSCALER, INC. (ZSCAL)
RegDate:        2014-11-14
Updated:        2015-01-21
Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/ip/165.225.0.0

OrgName:        ZSCALER, INC.
OrgId:          ZSCAL
Address:        120 Holger Way
City:           San Jose
StateProv:      CA
PostalCode:     95134
Country:        US
RegDate:        2011-03-18
Updated:        2025-11-06
Comment:        Zscaler customer traffic originates from colocation facilities around the world. You should *NOT* use the address or contact information here for the purposes of geolocation. Additionally, because traffic egressing our network may belong to any one of our customers, you should not assume that this traffic belongs to us.
Comment:        
Comment:        For network or security incidents, please reach out to our abuse POC, which is actually monitored and actioned.
Ref:            https://rdap.arin.net/registry/entity/ZSCAL

OrgAbuseHandle: POCAB2-ARIN
OrgAbuseName:   poc-abuse
OrgAbusePhone:  +1-408-701-0534 
OrgAbuseEmail:  poc-abuse@zscaler.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/POCAB2-ARIN

OrgTechHandle: MMT31-ARIN
OrgTechName:   Teng, Michael Michael
OrgTechPhone:  +1-650-937-9195 
OrgTechEmail:  mteng@zscaler.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MMT31-ARIN

OrgTechHandle: POCTE3-ARIN
OrgTechName:   poc-tech
OrgTechPhone:  +1-408-701-0534 
OrgTechEmail:  poc-tech@zscaler.com
OrgTechRef:    https://rdap.arin.net/registry/entity/POCTE3-ARIN

OrgNOCHandle: POCNO1-ARIN
OrgNOCName:   poc-noc
OrgNOCPhone:  +1-408-701-0534 
OrgNOCEmail:  poc-noc@zscaler.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/POCNO1-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#