64.28.104.0/21

NetRange:       64.28.96.0 - 64.28.111.255
CIDR:           64.28.96.0/20
NetName:        ONR-CIDR2
NetHandle:      NET-64-28-96-0-1
Parent:         NET64 (NET-64-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       AS3728
Organization:   LightEdge Solutions (LIGHT-41)
RegDate:        2000-01-05
Updated:        2016-09-22
Ref:            https://rdap.arin.net/registry/ip/64.28.96.0

OrgName:        LightEdge Solutions
OrgId:          LIGHT-41
Address:        909 Locust Street
Address:        Suite 301
City:           Des Moines
StateProv:      IA
PostalCode:     50309
Country:        US
RegDate:        2006-12-28
Updated:        2018-09-13
Ref:            https://rdap.arin.net/registry/entity/LIGHT-41

ReferralServer:  rwhois://rwhois.lh.net:4321

OrgTechHandle: IL68-ARIN
OrgTechName:   LightEdge Hostmaster
OrgTechPhone:  +1-515-471-1000 
OrgTechEmail:  hostmaster@lightedge.com
OrgTechRef:    https://rdap.arin.net/registry/entity/IL68-ARIN

OrgAbuseHandle: LIGHT7-ARIN
OrgAbuseName:   LightEdge Abuse
OrgAbusePhone:  +1-515-471-1000 
OrgAbuseEmail:  abuse@lightedge.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LIGHT7-ARIN

OrgNOCHandle: LIGHT71-ARIN
OrgNOCName:   LightEdge NOC
OrgNOCPhone:  +1-515-471-1000 
OrgNOCEmail:  support@lightedge.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/LIGHT71-ARIN

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