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

% This is the RIPE Database query service.
% The objects are in RPSL format.
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% Information related to '86.47.138.48 - 86.47.138.63'

% Abuse contact for '86.47.138.48 - 86.47.138.63' is 'ripe-support@eir.ie'

inetnum:        86.47.138.48 - 86.47.138.63
netname:        DUBLINCITYCOUNCIL
descr:          Eircom Customer Assignment
country:        IE
admin-c:        WD1221-RIPE
tech-c:         WD1221-RIPE
status:         ASSIGNED PA
mnt-by:         TE-MNT
remarks:        Please send spam and other abuse complaints to abuse@eircom.net
created:        2014-02-13T15:13:00Z
last-modified:  2014-02-13T15:13:00Z
source:         RIPE # Filtered

person:         Willie Dempsey
address:        Civic Offices
address:        Fishamble St
address:        Dublin 8
phone:          +353 1 2224301
mnt-by:         TE-MNT
nic-hdl:        WD1221-RIPE
created:        2014-02-13T15:13:00Z
last-modified:  2014-02-13T15:13:00Z
source:         RIPE # Filtered

% Information related to '86.44.0.0/14AS5466'

route:          86.44.0.0/14
descr:          eircom, Ireland
origin:         AS5466
remarks:        For abuse/spam complaints for addresses from this block
remarks:        please contact the techc and/or adminc for the individual
remarks:        inetnum objects. If this does not resolve the problem to
remarks:        your satisfaction please submit a report on the web at
remarks:        http://support.eircom.net/abuse/
remarks:        peering@eircom.net should ONLY be used for routing issues.
mnt-by:         TE-MNT
created:        2015-11-16T16:28:53Z
last-modified:  2015-11-16T16:28:53Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.120 (DEXTER)