% 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:       141.221.0.0 - 141.221.255.255
CIDR:           141.221.0.0/16
NetName:        IDAHO-NATIONAL-LABORATORY
NetHandle:      NET-141-221-0-0-1
Parent:         RIPE-ERX-141 (NET-141-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Idaho National Laboratory (INL-12)
RegDate:        1990-07-31
Updated:        2021-12-14
Ref:            https://rdap.arin.net/registry/ip/141.221.0.0

OrgName:        Idaho National Laboratory
OrgId:          INL-12
Address:        2525 Fremont Ave
Address:        Mail Stop 2604
City:           Idaho Falls
StateProv:      ID
PostalCode:     83415
Country:        US
RegDate:        2005-05-10
Updated:        2024-01-22
Ref:            https://rdap.arin.net/registry/entity/INL-12

OrgNOCHandle: KNIGH356-ARIN
OrgNOCName:   Knight, Sarah 
OrgNOCPhone:  +1-208-526-4250 
OrgNOCEmail:  sarah.knight@inl.gov
OrgNOCRef:    https://rdap.arin.net/registry/entity/KNIGH356-ARIN

OrgTechHandle: GRD8-ARIN
OrgTechName:   Danklefsen, George Richard
OrgTechPhone:  +1-208-526-6369 
OrgTechEmail:  dankgr@inl.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/GRD8-ARIN

OrgTechHandle: KNIGH356-ARIN
OrgTechName:   Knight, Sarah 
OrgTechPhone:  +1-208-526-4250 
OrgTechEmail:  sarah.knight@inl.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/KNIGH356-ARIN

OrgAbuseHandle: GRD8-ARIN
OrgAbuseName:   Danklefsen, George Richard
OrgAbusePhone:  +1-208-526-6369 
OrgAbuseEmail:  dankgr@inl.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/GRD8-ARIN

OrgAbuseHandle: KNIGH356-ARIN
OrgAbuseName:   Knight, Sarah 
OrgAbusePhone:  +1-208-526-4250 
OrgAbuseEmail:  sarah.knight@inl.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KNIGH356-ARIN

OrgDNSHandle: GRD8-ARIN
OrgDNSName:   Danklefsen, George Richard
OrgDNSPhone:  +1-208-526-6369 
OrgDNSEmail:  dankgr@inl.gov
OrgDNSRef:    https://rdap.arin.net/registry/entity/GRD8-ARIN

OrgDNSHandle: KNIGH356-ARIN
OrgDNSName:   Knight, Sarah 
OrgDNSPhone:  +1-208-526-4250 
OrgDNSEmail:  sarah.knight@inl.gov
OrgDNSRef:    https://rdap.arin.net/registry/entity/KNIGH356-ARIN

OrgRoutingHandle: GRD8-ARIN
OrgRoutingName:   Danklefsen, George Richard
OrgRoutingPhone:  +1-208-526-6369 
OrgRoutingEmail:  dankgr@inl.gov
OrgRoutingRef:    https://rdap.arin.net/registry/entity/GRD8-ARIN

OrgRoutingHandle: KNIGH356-ARIN
OrgRoutingName:   Knight, Sarah 
OrgRoutingPhone:  +1-208-526-4250 
OrgRoutingEmail:  sarah.knight@inl.gov
OrgRoutingRef:    https://rdap.arin.net/registry/entity/KNIGH356-ARIN

OrgNOCHandle: GRD8-ARIN
OrgNOCName:   Danklefsen, George Richard
OrgNOCPhone:  +1-208-526-6369 
OrgNOCEmail:  dankgr@inl.gov
OrgNOCRef:    https://rdap.arin.net/registry/entity/GRD8-ARIN

RTechHandle: KMW3-ARIN
RTechName:   Welch, Kelly Maril
RTechPhone:  +1-208-526-5421 
RTechEmail:  Kelly.Welch@inl.gov
RTechRef:    https://rdap.arin.net/registry/entity/KMW3-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.
#