% APNIC found the following authoritative answer from: whois.ripe.net

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '81.31.64.0 - 81.31.79.255'

% Abuse contact for '81.31.64.0 - 81.31.79.255' is 'hostmaster@fastnet.co.uk'

inetnum:        81.31.64.0 - 81.31.79.255
netname:        UK-FASTNET-20090409
country:        GB
org:            ORG-FIL1-RIPE
admin-c:        JP9637-RIPE
tech-c:         JP9637-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         FN-RIPE
mnt-routes:     FN-RIPE
mnt-domains:    FN-RIPE
created:        2009-04-09T09:54:43Z
last-modified:  2017-11-06T12:38:26Z
source:         RIPE # Filtered

organisation:   ORG-FIL1-RIPE
org-name:       FastNet International Ltd
country:        GB
org-type:       LIR
address:        Shaftesbury Court, 95 Ditchling Road
address:        BN1 4ST
address:        Brighton
address:        United Kingdom
phone:          +44 1273 662888
fax-no:         +44 1273 621631
abuse-c:        AR17647-RIPE
mnt-ref:        FN-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         FN-RIPE
admin-c:        NP1213-RIPE
admin-c:        JP9637-RIPE
created:        2004-04-17T12:14:37Z
last-modified:  2020-12-16T13:18:52Z
source:         RIPE # Filtered

person:         James Parker
address:        Fastnet International
address:        Shaftesbury Court
address:        95, Ditchling Road
address:        Brighton
address:        BN1 4ST
address:        England
phone:          +44 1273 688088
fax-no:         +44 1273 621631
nic-hdl:        JP9637-RIPE
mnt-by:         FN-RIPE
remarks:        ########################################################
remarks:        #Please send all abuse reports to abuse@fastnet.co.uk #
remarks:        ########################################################
created:        1970-01-01T00:00:00Z
last-modified:  2013-08-22T09:11:08Z
source:         RIPE # Filtered

% Information related to '81.31.64.0/20AS12519'

route:          81.31.64.0/20
descr:          Routing for Fastnet International
origin:         AS12519
mnt-by:         FN-RIPE
created:        2009-10-15T14:03:31Z
last-modified:  2009-10-15T14:03:31Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.116 (ABERDEEN)