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

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% The objects are in RPSL format.
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% Information related to '2a00:23c0::/27'

% Abuse contact for '2a00:23c0::/27' is 'protect@bt.com'

inet6num:       2a00:23c0::/27
netname:        BTBROADBAND
descr:          BTBROADBAND
country:        GB
org:            ORG-BT4-RIPE
admin-c:        BTCR1-RIPE
tech-c:         BTCR1-RIPE
status:         ALLOCATED-BY-LIR
mnt-by:         BTENT-MNT
mnt-lower:      BTENT-MNT
mnt-routes:     BTNET-MNT
mnt-domains:    BTENT-MNT
created:        2015-09-09T15:34:31Z
last-modified:  2015-09-09T15:34:31Z
source:         RIPE # Filtered

organisation:   ORG-BT4-RIPE
org-name:       British Telecommunications PLC
country:        GB
org-type:       LIR
address:        pp HWJ380, PO Box 67501, BT Centre
address:        EC1P 1PG
address:        London
address:        UNITED KINGDOM
phone:          +44 3316 260934
admin-c:        BTCR1-RIPE
admin-c:        MS35380-RIPE
admin-c:        GW3285-RIPE
mnt-ref:        BTENT-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BTENT-MNT
abuse-c:        BTCR3-RIPE
created:        2004-04-17T12:11:54Z
last-modified:  2021-08-18T08:31:41Z
source:         RIPE # Filtered

role:           BT Corporate Registry
address:        British Telecommunications
address:        81 Newgate Street
address:        London GB
admin-c:        BCER1-RIPE
admin-c:        MS35380-RIPE
admin-c:        GW3285-RIPE
tech-c:         BCER1-RIPE
tech-c:         MS35380-RIPE
tech-c:         GW3285-RIPE
nic-hdl:        BTCR1-RIPE
abuse-mailbox:  protect@bt.com
mnt-by:         BTENT-MNT
created:        2002-03-22T09:16:45Z
last-modified:  2021-03-16T11:44:48Z
source:         RIPE # Filtered

% Information related to '2a00:2380::/25AS2856'

route6:         2a00:2380::/25
descr:          BT UK aggregate
origin:         AS2856
mnt-by:         CIP-MNT
mnt-by:         BTNET-MNT
mnt-by:         BTENT-MNT
created:        2013-11-18T09:53:59Z
last-modified:  2013-11-18T09:53:59Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (ABERDEEN)

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