Whois results:

inetnum:        81.91.160.0 - 81.91.175.255
org:            ORG-De1-RIPE
netname:        DE-DENIC-20020718
descr:          DENIC eG
country:        DE
admin-c:        SD24
tech-c:         EKB2
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-lower:      DE-DOM
mnt-routes:     DE-DOM
source:         RIPE # Filtered

organisation:   ORG-De1-RIPE
org-name:       DENIC eG
org-type:       LIR
phone:          +4969272350
fax-no:         +496927235235
admin-c:        EKB2
admin-c:        HD4-RIPE
admin-c:        SD24
mnt-ref:        DE-DOM
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
source:         RIPE # Filtered
address:        DENIC eG
address:        Dr. Joerg Schweiger
address:        Kaiserstr. 75-77
address:        60329 Frankfurt
address:        GERMANY

person:         Elmar K Bins
address:        DENIC eG
address:        Kaiserstr. 75-77
address:        D-60329 Frankfurt/Main
address:        Germany
phone:          +49 69 27235 0
fax-no:         +49 69 27235 235
nic-hdl:        EKB2
mnt-by:         ELMI-MNT
source:         RIPE # Filtered

person:         Sabine Dolderer
address:        DENIC eG
address:        Kaiserstrasse 75-77
address:        D-60329 Frankfurt
address:        Germany
phone:          +49 69 27235 0
fax-no:         +49 69 27235 235
nic-hdl:        SD24
mnt-by:         DENIC-P
source:         RIPE # Filtered


route:          81.91.170.0/24
descr:          DENIC eG
origin:         AS8763
mnt-by:         DE-DOM
source:         RIPE # Filtered