66.90.121.0/24

NetRange:       66.90.64.0 - 66.90.127.255
CIDR:           66.90.64.0/18
NetName:        FDCSERVERS
NetHandle:      NET-66-90-64-0-1
Parent:         NET66 (NET-66-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       AS174, AS30058
Organization:   FDCservers.net (FDCSE)
RegDate:        2003-08-18
Updated:        2018-10-12
Ref:            https://rdap.arin.net/registry/ip/66.90.64.0

OrgName:        FDCservers.net
OrgId:          FDCSE
Address:        175 Main St. #1363
City:           Destin
StateProv:      FL
PostalCode:     32540
Country:        US
RegDate:        2003-05-20
Updated:        2021-06-09
Ref:            https://rdap.arin.net/registry/entity/FDCSE

ReferralServer:  rwhois://rwhois.fdcservers.net:4321

OrgTechHandle: ABUSE438-ARIN
OrgTechName:   ABUSE department
OrgTechPhone:  +1-312-423-6675 
OrgTechEmail:  abuse@fdcservers.net
OrgTechRef:    https://rdap.arin.net/registry/entity/ABUSE438-ARIN

OrgAbuseHandle: ABUSE438-ARIN
OrgAbuseName:   ABUSE department
OrgAbusePhone:  +1-312-423-6675 
OrgAbuseEmail:  abuse@fdcservers.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE438-ARIN

OrgNOCHandle: ABUSE438-ARIN
OrgNOCName:   ABUSE department
OrgNOCPhone:  +1-312-423-6675 
OrgNOCEmail:  abuse@fdcservers.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/ABUSE438-ARIN

Found a referral to rwhois.fdcservers.net:4321.