% 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:       198.170.0.0 - 198.173.255.255
CIDR:           198.170.0.0/15, 198.172.0.0/15
NetName:        NTTA-198-170
NetHandle:      NET-198-170-0-0-1
Parent:         NET198 (NET-198-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   NTT America, Inc. (NTTAM-1)
RegDate:        1993-05-06
Updated:        2012-03-02
Comment:        
Comment:        Reassignment information for this block is
Comment:        available at rwhois.gin.ntt.net port 4321
Ref:            https://rdap.arin.net/registry/ip/198.170.0.0

OrgName:        NTT America, Inc.
OrgId:          NTTAM-1
Address:        15809 Bear Creek Pkwy
Address:        Suite 320
City:           Redmond
StateProv:      WA
PostalCode:     98052
Country:        US
RegDate:        2005-12-08
Updated:        2024-03-04
Ref:            https://rdap.arin.net/registry/entity/NTTAM-1

ReferralServer:  rwhois://rwhois.gin.ntt.net:4321

OrgAbuseHandle: NAAC-ARIN
OrgAbuseName:   NTT America Abuse Contact
OrgAbusePhone:  +1-877-688-6625 
OrgAbuseEmail:  abuse@ntt.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NAAC-ARIN

OrgNOCHandle: NASC-ARIN
OrgNOCName:   NTT America Support Contact
OrgNOCPhone:  +1-877-688-6625 
OrgNOCEmail:  support@us.ntt.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/NASC-ARIN

OrgRoutingHandle: PEERI-ARIN
OrgRoutingName:   Peering
OrgRoutingPhone:  +1-877-688-6625 
OrgRoutingEmail:  peering@ntt.net
OrgRoutingRef:    https://rdap.arin.net/registry/entity/PEERI-ARIN

OrgTechHandle: CANDE70-ARIN
OrgTechName:   Candela, Massimo 
OrgTechPhone:  +1-214-915-1366 
OrgTechEmail:  massimo@ntt.net
OrgTechRef:    https://rdap.arin.net/registry/entity/CANDE70-ARIN

OrgTechHandle: VIPAR-ARIN
OrgTechName:   VIPAR
OrgTechPhone:  +1-877-688-6625 
OrgTechEmail:  ipr@gin.ntt.net
OrgTechRef:    https://rdap.arin.net/registry/entity/VIPAR-ARIN

RTechHandle: VIA4-ORG-ARIN
RTechName:   VIPAR
RTechPhone:  +1-877-688-6625 
RTechEmail:  ipr@gin.ntt.net
RTechRef:    https://rdap.arin.net/registry/entity/VIA4-ORG-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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