% 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 1997-2024, American Registry for Internet Numbers, Ltd.
#

NetRange:       128.29.0.0 - 128.29.255.255
CIDR:           128.29.0.0/16
NetName:        MITRE
NetHandle:      NET-128-29-0-0-1
Parent:         NET128 (NET-128-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   The MITRE Corporation (THEMIT-1)
RegDate:        1983-10-24
Updated:        2023-03-02
Ref:            https://rdap.arin.net/registry/ip/128.29.0.0

OrgName:        The MITRE Corporation
OrgId:          THEMIT-1
Address:        202 Burlington Rd.
Address:        Dept. R10N
City:           Bedford
StateProv:      MA
PostalCode:     02152
Country:        US
RegDate:        1985-09-04
Updated:        2023-03-02
Ref:            https://rdap.arin.net/registry/entity/THEMIT-1

OrgAbuseHandle: MAURE26-ARIN
OrgAbuseName:   Maurer, Bruce 
OrgAbusePhone:  +1-703-928-8298 
OrgAbuseEmail:  maurerbe@mitre.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MAURE26-ARIN

OrgTechHandle: MAURE26-ARIN
OrgTechName:   Maurer, Bruce 
OrgTechPhone:  +1-703-928-8298 
OrgTechEmail:  maurerbe@mitre.org
OrgTechRef:    https://rdap.arin.net/registry/entity/MAURE26-ARIN

OrgAbuseHandle: SMS64-ARIN
OrgAbuseName:   Stuart, M Sean 
OrgAbusePhone:  +1-571-926-4806 
OrgAbuseEmail:  sstuart@mitre.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SMS64-ARIN

OrgNOCHandle: MITRE-ARIN
OrgNOCName:   MITRE-IPADMIN
OrgNOCPhone:  +1-703-983-7152 
OrgNOCEmail:  ipadmin@mitre.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/MITRE-ARIN

OrgTechHandle: SMS64-ARIN
OrgTechName:   Stuart, M Sean 
OrgTechPhone:  +1-571-926-4806 
OrgTechEmail:  sstuart@mitre.org
OrgTechRef:    https://rdap.arin.net/registry/entity/SMS64-ARIN

RTechHandle: MAURE26-ARIN
RTechName:   Maurer, Bruce 
RTechPhone:  +1-703-928-8298 
RTechEmail:  maurerbe@mitre.org
RTechRef:    https://rdap.arin.net/registry/entity/MAURE26-ARIN

RNOCHandle: MITRE-ARIN
RNOCName:   MITRE-IPADMIN
RNOCPhone:  +1-703-983-7152 
RNOCEmail:  ipadmin@mitre.org
RNOCRef:    https://rdap.arin.net/registry/entity/MITRE-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 1997-2024, American Registry for Internet Numbers, Ltd.
#

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