% 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://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

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

% Information related to 'AS8797 - AS9128'

as-block:       AS8797 - AS9128
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2021-11-04T15:25:08Z
last-modified:  2021-11-04T15:25:08Z
source:         RIPE

% Information related to 'AS8860'

% Abuse contact for 'AS8860' is 'abuse@delta.bg'

aut-num:        AS8860
as-name:        DELTA-BG-AS
org:            ORG-DHL29-RIPE
remarks:        GTT
import:         from AS3257 accept ANY
export:         to AS3257 announce AS-DELTABG
remarks:        Lumen
import:         from AS3356 accept ANY
export:         to AS3356 announce AS-DELTABG
remarks:        Orange
import:         from AS5511 accept ANY
export:         to AS5511 announce AS-DELTABG
remarks:        IPACCT
import:         from AS31287 accept ANY
export:         to AS31287 announce AS-DELTABG
remarks:        PATH Network
import:         from AS396998 accept ANY
export:         to AS396998 announce AS-DELTABG
remarks:        Cogent
import:         from AS174 accept ANY
export:         to AS174 announce AS-DELTABG
remarks:        DE-CIX - many thanks to joffer for the help here
import:         from AS6695 accept AS-DECIX
export-via:     afi ipv4.unicast AS6695 to AS-DECIX announce AS-DELTABG
remarks:        === IPV6 UPSTREAMS ===
remarks:        == GTT ==
mp-import:      afi ipv6 from AS3257 accept ANY
mp-export:      afi ipv6 to AS3257 announce AS-DELTABG
remarks:        == Lumen ==
mp-import:      afi ipv6 from AS3356 accept ANY
mp-export:      afi ipv6 to AS3356 announce AS-DELTABG
remarks:        == Orange ==
mp-import:      afi ipv6 from AS5511 accept ANY
mp-export:      afi ipv6 to AS5511 announce AS-DELTABG
remarks:        == IPACCT ==
mp-import:      afi ipv6 from AS31287 accept ANY
mp-export:      afi ipv6 to AS31287 announce AS-DELTABG
remarks:        == Cogent ==
mp-import:      afi ipv6 from AS174 accept ANY
mp-export:      afi ipv6 to AS174 announce AS-DELTABG
remarks:        == PATH Network ==
mp-import:      afi ipv6 from AS396998 accept ANY
mp-export:      afi ipv6 to AS396998 announce AS-DELTABG
remarks:        == DE-CIX Network ==
mp-import:      afi ipv6 from AS6695 accept AS-DECIX-V6
export-via:     afi ipv6.unicast AS6695 to AS-DECIX-V6 announce AS-DELTABG
remarks:        == END ==
admin-c:        DZ3089-RIPE
tech-c:         DZ3089-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         mnt-bg-deltahitech-1
created:        2001-12-04T12:05:27Z
last-modified:  2024-02-15T09:20:48Z
source:         RIPE

organisation:   ORG-DHL29-RIPE
org-name:       Delta HighTech Ltd.
country:        BG
org-type:       LIR
address:        Street Naicho Tzanov 172
address:        1309
address:        Sofia
address:        BULGARIA
phone:          +359895669979
admin-c:        DZ3089-RIPE
admin-c:        HD3322-RIPE
tech-c:         DZ3089-RIPE
tech-c:         HD3322-RIPE
abuse-c:        AR52592-RIPE
mnt-ref:        mnt-bg-deltahitech-1
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         mnt-bg-deltahitech-1
created:        2019-05-10T09:48:37Z
last-modified:  2021-01-18T08:55:58Z
source:         RIPE # Filtered

person:         Dragomir Zhelev
address:        Tsaribrodska 70
address:        1309
address:        Sofia
address:        BULGARIA
phone:          +359895669979
nic-hdl:        DZ3089-RIPE
mnt-by:         mnt-bg-deltahitech-1
created:        2019-05-10T09:48:36Z
last-modified:  2023-09-04T17:45:05Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.113.2 (BUSA)

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain