Whois Lookup

Query registration info, expiration date, registrar and more for domain, IP or ASN

Example： google.com · baidu.com · github.com · 8.8.8.8 · 211.234.110.0/24 · AS13335
Registration Info
209.55.145.0/24
IP Range
209.55.145.0 - 209.55.145.255
CIDR
209.55.145.0/24
Network Name
ZSCALER-SJC4
Country/Region
US
Abuse Contact
[email protected]
Registration Date
2023-06-14
Update Date
2023-06-14
Domain Status
Reassigned
Raw Whois Data
#
# 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.
#



# start

NetRange:       209.55.128.0 - 209.55.223.255
CIDR:           209.55.128.0/18, 209.55.192.0/19
NetName:        ZSCAL
NetHandle:      NET-209-55-128-0-1
Parent:         NET209 (NET-209-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   ZSCALER, INC. (ZSCAL)
RegDate:        2021-09-21
Updated:        2021-09-21
Ref:            https://rdap.arin.net/registry/ip/209.55.128.0



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


OrgNOCHandle: POCNO1-ARIN
OrgNOCName:   poc-noc
OrgNOCPhone:  +1-408-701-0534 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/POCNO1-ARIN

OrgTechHandle: MMT31-ARIN
OrgTechName:   Teng, Michael Michael
OrgTechPhone:  +1-650-937-9195 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/MMT31-ARIN

OrgTechHandle: POCTE3-ARIN
OrgTechName:   poc-tech
OrgTechPhone:  +1-408-701-0534 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/POCTE3-ARIN

OrgAbuseHandle: POCAB2-ARIN
OrgAbuseName:   poc-abuse
OrgAbusePhone:  +1-408-701-0534 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/POCAB2-ARIN

# end


# start

NetRange:       209.55.145.0 - 209.55.145.255
CIDR:           209.55.145.0/24
NetName:        ZSCALER-SJC4
NetHandle:      NET-209-55-145-0-1
Parent:         ZSCAL (NET-209-55-128-0-1)
NetType:        Reassigned
OriginAS:       
Customer:       Zscaler, Inc. (C09661054)
RegDate:        2023-06-14
Updated:        2023-06-14
Ref:            https://rdap.arin.net/registry/ip/209.55.145.0


CustName:       Zscaler, Inc.
Address:        1735 Lundy Avenue
City:           San Jose
StateProv:      CA
PostalCode:     95131
Country:        US
RegDate:        2023-06-14
Updated:        2023-06-14
Ref:            https://rdap.arin.net/registry/entity/C09661054

OrgNOCHandle: POCNO1-ARIN
OrgNOCName:   poc-noc
OrgNOCPhone:  +1-408-701-0534 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/POCNO1-ARIN

OrgTechHandle: MMT31-ARIN
OrgTechName:   Teng, Michael Michael
OrgTechPhone:  +1-650-937-9195 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/MMT31-ARIN

OrgTechHandle: POCTE3-ARIN
OrgTechName:   poc-tech
OrgTechPhone:  +1-408-701-0534 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/POCTE3-ARIN

OrgAbuseHandle: POCAB2-ARIN
OrgAbuseName:   poc-abuse
OrgAbusePhone:  +1-408-701-0534 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/POCAB2-ARIN

# end



#
# 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.
#