161.72.0.0/16

NetRange:       161.71.0.0 - 161.74.255.255
CIDR:           161.71.0.0/16, 161.72.0.0/15, 161.74.0.0/16
NetName:        RIPE-ERX-161-71-0-0
NetHandle:      NET-161-71-0-0-1
Parent:         NET161 (NET-161-0-0-0-0)
NetType:        Early Registrations, Transferred to RIPE NCC
OriginAS:       
Organization:   RIPE Network Coordination Centre (RIPE)
RegDate:        2004-02-18
Updated:        2004-02-18
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/161.71.0.0

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:        161.72.0.0 - 161.72.255.255
netname:        IAC
descr:          Instituto de Astrofisica de Canarias
descr:          Tenerife, Islas Canarias
country:        ES
admin-c:        DS2108
tech-c:         DS2108
abuse-c:        RIAC2-RIPE
status:         LEGACY
mnt-irt:        IRT-IRIS
remarks:        mail spam reports: iris@certsi.es
remarks:        security incidents: iris@certsi.es
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T13:06:12Z
source:         RIPE # Filtered

person:         Diego Sierra Gonzalez
address:        Instituto de Astrofisica de Canarias
address:        Via Lactea, s/n
address:        E-38200 La Laguna (Tenerife)
address:        SPAIN
phone:          +34 922605200
fax-no:         +34 922605210
nic-hdl:        DS2108
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2017-10-30T21:44:31Z
source:         RIPE # Filtered

route:          161.72.0.0/16
descr:          IAC
origin:         AS766
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2012-03-12T08:11:41Z
source:         RIPE