151.251.0.0/16

NetRange:       151.0.0.0 - 151.255.255.255
CIDR:           151.0.0.0/8
NetName:        RIPE-ERX-151
NetHandle:      NET-151-0-0-0-0
Parent:          ()
NetType:        Early Registrations, Maintained by RIPE NCC
OriginAS:       
Organization:   RIPE Network Coordination Centre (RIPE)
RegDate:        1993-05-01
Updated:        2009-05-18
Comment:        These addresses have been further assigned to users in
Comment:        the RIPE NCC region.  Contact information can be found in
Comment:        the RIPE database at http://www.ripe.net/whois
Ref:            https://rdap.arin.net/registry/ip/151.0.0.0

ResourceLink:  https://apps.db.ripe.net/search/query.html
ResourceLink:  whois.ripe.net

OrgName:        RIPE Network Coordination Centre
OrgId:          RIPE
Address:        P.O. Box 10096
City:           Amsterdam
StateProv:      
PostalCode:     1001EB
Country:        NL
RegDate:        
Updated:        2013-07-29
Ref:            https://rdap.arin.net/registry/entity/RIPE

ReferralServer:  whois://whois.ripe.net
ResourceLink:  https://apps.db.ripe.net/search/query.html

OrgAbuseHandle: ABUSE3850-ARIN
OrgAbuseName:   Abuse Contact
OrgAbusePhone:  +31205354444 
OrgAbuseEmail:  abuse@ripe.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE3850-ARIN

OrgTechHandle: RNO29-ARIN
OrgTechName:   RIPE NCC Operations
OrgTechPhone:  +31 20 535 4444 
OrgTechEmail:  hostmaster@ripe.net
OrgTechRef:    https://rdap.arin.net/registry/entity/RNO29-ARIN

Found a referral to whois.ripe.net.

inetnum:        151.251.0.0 - 151.251.255.255
netname:        BG-MTELNET-20120821
country:        BG
org:            ORG-MN1-RIPE
admin-c:        GG15027-RIPE
tech-c:         GG15027-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS12716-MNT
created:        2012-08-21T08:40:20Z
last-modified:  2017-11-08T10:04:46Z
source:         RIPE # Filtered

organisation:   ORG-MN1-RIPE
org-name:       A1 Bulgaria EAD
country:        BG
org-type:       LIR
address:        1 Kukush Str.
address:        1309
address:        Sofia
address:        BULGARIA
phone:          +359 884900098
fax-no:         +359 88 110 3970
abuse-c:        AR14215-RIPE
admin-c:        GL12267-RIPE
mnt-ref:        AS12716-MNT
mnt-ref:        SPNET-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS12716-MNT
created:        2004-04-17T11:01:14Z
last-modified:  2022-08-19T07:24:27Z
source:         RIPE # Filtered

person:         Georgi Gaydarov
address:        Sofia kukush1
phone:          +359888088088
nic-hdl:        GG15027-RIPE
mnt-by:         SPNET-MNT
created:        2015-12-14T09:16:03Z
last-modified:  2017-05-02T06:18:13Z
source:         RIPE

route:          151.251.0.0/16
descr:          A1 BG Net
origin:         AS8717
mnt-by:         SPNET-MNT
mnt-by:         AS13124-MNT
created:        2021-04-23T07:00:26Z
last-modified:  2022-11-28T16:20:10Z
source:         RIPE