% 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:       216.198.0.0 - 216.198.63.255
CIDR:           216.198.0.0/18
NetName:        ZENDESK-NETWORK
NetHandle:      NET-216-198-0-0-1
Parent:         NET216 (NET-216-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Zendesk, Inc. (ZENDE-3)
RegDate:        2015-05-29
Updated:        2024-03-20
Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/ip/216.198.0.0

OrgName:        Zendesk, Inc.
OrgId:          ZENDE-3
Address:        989 Market St
City:           San Francisco
StateProv:      CA
PostalCode:     94103
Country:        US
RegDate:        2012-10-04
Updated:        2024-02-12
Ref:            https://rdap.arin.net/registry/entity/ZENDE-3

OrgNOCHandle: NETWO5465-ARIN
OrgNOCName:   Network Operations
OrgNOCPhone:  +1-415-418-7506 
OrgNOCEmail:  network@zendesk.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO5465-ARIN

OrgRoutingHandle: NETWO5465-ARIN
OrgRoutingName:   Network Operations
OrgRoutingPhone:  +1-415-418-7506 
OrgRoutingEmail:  network@zendesk.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NETWO5465-ARIN

OrgAbuseHandle: NETWO5465-ARIN
OrgAbuseName:   Network Operations
OrgAbusePhone:  +1-415-418-7506 
OrgAbuseEmail:  network@zendesk.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO5465-ARIN

OrgTechHandle: NETWO5465-ARIN
OrgTechName:   Network Operations
OrgTechPhone:  +1-415-418-7506 
OrgTechEmail:  network@zendesk.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5465-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.
#