% 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/
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# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

NetRange:       204.45.0.0 - 204.45.255.255
CIDR:           204.45.0.0/16
NetName:        AMAZO-4
NetHandle:      NET-204-45-0-0-1
Parent:         NET204 (NET-204-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Amazon.com, Inc. (AMAZO-4)
RegDate:        2020-07-20
Updated:        2020-11-10
Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/ip/204.45.0.0

OrgName:        Amazon.com, Inc.
OrgId:          AMAZO-4
Address:        Amazon Web Services, Inc.
Address:        P.O. Box 81226
City:           Seattle
StateProv:      WA
PostalCode:     98108-1226
Country:        US
RegDate:        2005-09-29
Updated:        2022-09-30
Comment:        For details of this service please see
Comment:        http://ec2.amazonaws.com
Ref:            https://rdap.arin.net/registry/entity/AMAZO-4

OrgNOCHandle: AANO1-ARIN
OrgNOCName:   Amazon AWS Network Operations
OrgNOCPhone:  +1-206-555-0000 
OrgNOCEmail:  amzn-noc-contact@amazon.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/AANO1-ARIN

OrgRoutingHandle: IPROU3-ARIN
OrgRoutingName:   IP Routing
OrgRoutingPhone:  +1-206-555-0000 
OrgRoutingEmail:  aws-routing-poc@amazon.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/IPROU3-ARIN

OrgAbuseHandle: AEA8-ARIN
OrgAbuseName:   Amazon EC2 Abuse
OrgAbusePhone:  +1-206-555-0000 
OrgAbuseEmail:  trustandsafety@support.aws.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AEA8-ARIN

OrgTechHandle: ANO24-ARIN
OrgTechName:   Amazon EC2 Network Operations
OrgTechPhone:  +1-206-555-0000 
OrgTechEmail:  amzn-noc-contact@amazon.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ANO24-ARIN

OrgRoutingHandle: ARMP-ARIN
OrgRoutingName:   AWS RPKI Management POC
OrgRoutingPhone:  +1-206-555-0000 
OrgRoutingEmail:  aws-rpki-routing-poc@amazon.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ARMP-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 1997-2025, American Registry for Internet Numbers, Ltd.
#