50300 CUSTDC, GB
Adjacency: 15 Upstream: 10 Downstream: 5
Upstream Adjacent AS list
AS2914 NTT-LTD-2914, US
AS37100 SEACOM-AS, MU
AS3741 IS, ZA
AS12552 IPO-EU, SE
AS9002 RETN-AS, GB
AS3223 VOXILITY, GB
AS6939 HURRICANE, US
AS174 COGENT-174, US
AS3257 GTT-BACKBONE GTT, US
AS3356 LEVEL3, US
Downstream Adjacent AS list
AS31463 FOURD-AS, GB
AS43408 OCD-UK, GB
AS51926 P1C-AS, GB
AS48407 TIGRISNET-IRAQ, IQ
AS39103 AS_MOAT, GB
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 9698 AS50300 ORG+TRN Originate: 11264 /18.54 Transit: 5120 /19.68 CUSTDC, GB
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 2588 AS50300 CUSTDC, GB 41 30 8 19 22 53.66% Prefix AS Path Aggregation Suggestion 5.102.168.0/21 2914 50300 + Announce - aggregate of 5.102.168.0/22 (2914 50300) and 5.102.172.0/22 (2914 50300) 5.102.168.0/24 2914 50300 - Withdrawn - aggregated with 5.102.169.0/24 (2914 50300) 5.102.169.0/24 2914 50300 - Withdrawn - aggregated with 5.102.168.0/24 (2914 50300) 5.102.170.0/24 2914 50300 - Withdrawn - aggregated with 5.102.171.0/24 (2914 50300) 5.102.171.0/24 2914 50300 - Withdrawn - aggregated with 5.102.170.0/24 (2914 50300) 5.102.172.0/24 2914 50300 - Withdrawn - aggregated with 5.102.173.0/24 (2914 50300) 5.102.173.0/24 2914 50300 - Withdrawn - aggregated with 5.102.172.0/24 (2914 50300) 5.102.174.0/24 2914 50300 - Withdrawn - aggregated with 5.102.175.0/24 (2914 50300) 5.102.175.0/24 2914 50300 - Withdrawn - aggregated with 5.102.174.0/24 (2914 50300) 92.118.16.0/24 2914 50300 109.74.240.0/22 2914 50300 + Announce - aggregate of 109.74.240.0/23 (2914 50300) and 109.74.242.0/23 (2914 50300) 109.74.240.0/24 2914 50300 - Withdrawn - aggregated with 109.74.241.0/24 (2914 50300) 109.74.241.0/24 2914 50300 - Withdrawn - aggregated with 109.74.240.0/24 (2914 50300) 109.74.242.0/24 2914 50300 - Withdrawn - aggregated with 109.74.243.0/24 (2914 50300) 109.74.243.0/24 2914 50300 - Withdrawn - aggregated with 109.74.242.0/24 (2914 50300) 109.74.244.0/24 2914 50300 109.74.246.0/23 2914 50300 + Announce - aggregate of 109.74.246.0/24 (2914 50300) and 109.74.247.0/24 (2914 50300) 109.74.246.0/24 2914 50300 - Withdrawn - aggregated with 109.74.247.0/24 (2914 50300) 109.74.247.0/24 2914 50300 - Withdrawn - aggregated with 109.74.246.0/24 (2914 50300) 109.74.248.0/22 2914 50300 + Announce - aggregate of 109.74.248.0/23 (2914 50300) and 109.74.250.0/23 (2914 50300) 109.74.248.0/24 2914 50300 - Withdrawn - aggregated with 109.74.249.0/24 (2914 50300) 109.74.249.0/24 2914 50300 - Withdrawn - aggregated with 109.74.248.0/24 (2914 50300) 109.74.250.0/24 2914 50300 - Withdrawn - aggregated with 109.74.251.0/24 (2914 50300) 109.74.251.0/24 2914 50300 - Withdrawn - aggregated with 109.74.250.0/24 (2914 50300) 109.74.252.0/24 2914 50300 109.74.254.0/24 2914 50300 109.74.255.0/24 3257 50300 176.12.104.0/22 2914 50300 + Announce - aggregate of 176.12.104.0/23 (2914 50300) and 176.12.106.0/23 (2914 50300) 176.12.104.0/24 2914 50300 - Withdrawn - aggregated with 176.12.105.0/24 (2914 50300) 176.12.105.0/24 2914 50300 - Withdrawn - aggregated with 176.12.104.0/24 (2914 50300) 176.12.106.0/24 2914 50300 - Withdrawn - aggregated with 176.12.107.0/24 (2914 50300) 176.12.107.0/24 2914 50300 - Withdrawn - aggregated with 176.12.106.0/24 (2914 50300) 176.12.108.0/23 2914 50300 + Announce - aggregate of 176.12.108.0/24 (2914 50300) and 176.12.109.0/24 (2914 50300) 176.12.108.0/24 2914 50300 - Withdrawn - aggregated with 176.12.109.0/24 (2914 50300) 176.12.109.0/24 2914 50300 - Withdrawn - aggregated with 176.12.108.0/24 (2914 50300) 176.12.110.0/24 2914 50300 185.14.164.0/22 2914 50300 185.32.72.0/23 2914 50300 + Announce - aggregate of 185.32.72.0/24 (2914 50300) and 185.32.73.0/24 (2914 50300) 185.32.72.0/24 2914 50300 - Withdrawn - aggregated with 185.32.73.0/24 (2914 50300) 185.32.73.0/24 2914 50300 - Withdrawn - aggregated with 185.32.72.0/24 (2914 50300) 185.32.75.0/24 2914 50300 185.42.65.0/24 2914 50300 185.48.164.0/22 2914 50300 + Announce - aggregate of 185.48.164.0/23 (2914 50300) and 185.48.166.0/23 (2914 50300) 185.48.164.0/24 2914 50300 - Withdrawn - aggregated with 185.48.165.0/24 (2914 50300) 185.48.165.0/24 2914 50300 - Withdrawn - aggregated with 185.48.164.0/24 (2914 50300) 185.48.166.0/24 2914 50300 - Withdrawn - aggregated with 185.48.167.0/24 (2914 50300) 185.48.167.0/24 2914 50300 - Withdrawn - aggregated with 185.48.166.0/24 (2914 50300) 185.104.136.0/24 37100 50300 193.33.198.0/24 2914 50300
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS50300 42 More Specifics 42 Total Advertisements CUSTDC, GB
5.102.168.0/24 5.102.168.0/21
5.102.169.0/24 5.102.168.0/21
5.102.172.0/24 5.102.168.0/21
5.102.173.0/24 5.102.168.0/21
5.102.174.0/24 5.102.168.0/21
5.102.175.0/24 5.102.168.0/21
46.18.8.0/22 46.18.8.0/21
92.118.16.0/24 92.118.16.0/22
109.74.240.0/24 109.74.240.0/20
109.74.241.0/24 109.74.240.0/20
109.74.242.0/24 109.74.240.0/20
109.74.243.0/24 109.74.240.0/20
109.74.244.0/24 109.74.240.0/20
109.74.245.0/24 109.74.240.0/20
109.74.246.0/24 109.74.240.0/20
109.74.247.0/24 109.74.240.0/20
109.74.248.0/24 109.74.240.0/20
109.74.249.0/24 109.74.240.0/20
109.74.250.0/24 109.74.240.0/20
109.74.251.0/24 109.74.240.0/20
109.74.252.0/24 109.74.240.0/20
109.74.254.0/24 109.74.240.0/20
109.74.255.0/24 109.74.240.0/20
176.12.104.0/24 176.12.104.0/21
176.12.105.0/24 176.12.104.0/21
176.12.106.0/24 176.12.104.0/21
176.12.107.0/24 176.12.104.0/21
176.12.108.0/24 176.12.104.0/21
176.12.109.0/24 176.12.104.0/21
176.12.110.0/24 176.12.104.0/21
185.32.72.0/24 185.32.72.0/22
185.32.73.0/24 185.32.72.0/22
185.32.74.0/24 185.32.72.0/22
185.32.75.0/24 185.32.72.0/22
185.42.65.0/24 185.42.64.0/22
185.48.164.0/24 185.48.164.0/22
185.48.165.0/24 185.48.164.0/22
185.48.166.0/24 185.48.164.0/22
185.48.167.0/24 185.48.164.0/22
185.104.136.0/24 185.104.136.0/22
193.33.198.0/24 193.33.198.0/23
195.60.173.0/24 195.60.172.0/23
5.102.170.0/24 5.102.168.0/21
5.102.171.0/24 5.102.168.0/21
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 46.18.8.0/22 Announced
+ 109.74.245.0/24 Announced
- 5.102.170.0/24 Withdrawn
- 5.102.171.0/24 Withdrawn
whois: 402549
IANA has recorded AS50300 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS50300\n % 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.
% Information related to 'AS50220 - AS50841'
as-block: AS50220 - AS50841
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: 2024-08-12T14:10:44Z
last-modified: 2024-08-12T14:10:44Z
source: RIPE
% Information related to 'AS50300'
% Abuse contact for 'AS50300' is 'abuse@CustodianDC.com'
aut-num: AS50300
as-name: CUSTDC
org: ORG-CL129-RIPE
remarks: =========================================================
remarks: | IPv4 Transit Peerings |
remarks: =========================================================
import: from AS174 action pref=100; accept ANY
export: to AS174 announce AS-CUSTDC
import: from AS2914 action pref=100; accept ANY
export: to AS2914 announce AS-CUSTDC
import: from AS3223 action pref=10; accept ANY
export: to AS3223 announce AS-CUSTDC
import: from AS3356 action pref=100; accept ANY
export: to AS3356 announce AS-CUSTDC
import: from AS5580 action pref=100; accept ANY
export: to AS5580 announce AS-CUSTDC
import: from AS6939 action pref=100; accept ANY
export: to AS6939 announce AS-CUSTDC
import: from AS31463 action pref=10; accept ANY
export: to AS31463 announce ANY
import: from AS215162 action pref=10; accept ANY
export: to AS215162 announce ANY
remarks: =========================================================
remarks: | IPv6 Transit Peerings |
remarks: =========================================================
mp-import: afi ipv6.unicast from AS174 action pref=100; accept ANY;
mp-export: afi ipv6.unicast to AS174 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS2914 action pref=100; accept ANY;
mp-export: afi ipv6.unicast to AS2914 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS3223 action pref=10; accept ANY;
mp-export: afi ipv6.unicast to AS3223 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS3356 action pref=100; accept ANY;
mp-export: afi ipv6.unicast to AS3356 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS5580 action pref=100; accept ANY;
mp-export: afi ipv6.unicast to AS5580 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS6939 action pref=100; accept ANY;
mp-export: afi ipv6.unicast to AS6939 announce AS-CUSTDC;
mp-import: afi ipv6.unicast from AS31463 action pref=10; accept ANY;
mp-export: afi ipv6.unicast to AS31463 announce ANY;
mp-import: afi ipv6.unicast from AS215162 action pref=10; accept ANY;
mp-export: afi ipv6.unicast to AS215162 announce ANY;
remarks: =========================================================
remarks: | Exchange Point Peerings via LINX |
remarks: =========================================================
export: to AS-ANY at 195.66.224.139 announce AS-CUSTDC
mp-export: afi ipv6.unicast to AS-ANY at 2001:7F8:4::C47C:1 announce AS-CUSTDC;
remarks: =========================================================
remarks: | Exchange Point Peerings via AMS-IX |
remarks: =========================================================
export: to AS-ANY at 80.249.211.14 announce AS-CUSTDC
mp-export: afi ipv6.unicast to AS-ANY at 2001:7f8:1::a505:300:1 announce AS-CUSTDC;
remarks: =========================================================
remarks: | Exchange Point Peerings via LonAP |
remarks: =========================================================
export: to AS-ANY at 5.57.80.96 announce AS-CUSTDC
mp-export: afi ipv6.unicast to AS-ANY at 2001:7f8:17::c47c:1 announce AS-CUSTDC;
remarks: =========================================================
remarks: | Customer IPv4 Peerings |
remarks: =========================================================
import: from AS43408 action pref=300; accept AS43408
export: to AS43408 announce ANY
import: from AS48101 action pref=300; accept AS48101
export: to AS48101 announce ANY
import: from AS51926 action pref=300; accept AS51926
export: to AS51926 announce ANY
import: from AS62217 action pref=300; accept AS62217
export: to AS62217 announce ANY
remarks: =========================================================
remarks: | Customer IPv6 Peerings |
remarks: =========================================================
mp-import: afi ipv6.unicast from AS43408 action pref=300; accept AS43408;
mp-export: afi ipv6.unicast to AS43408 announce ANY;
mp-import: afi ipv6.unicast from AS62217 action pref=300; accept AS62217;
mp-export: afi ipv6.unicast to AS62217 announce ANY;
remarks: =========================================================
remarks: | General Contact Information |
remarks: =========================================================
remarks: for ABUSE reports abuse@CustodianDC.com
remarks: for DNS requests dns@CustodianDC.com
remarks: for TECHNICAL requests support@CustodianDC.com
remarks: for PEERING requests peering@CustodianDC.com
remarks: =========================================================
remarks: | (e-mails not sent to these contacts will be ignored!) |
remarks: =========================================================
admin-c: CN2008-RIPE
tech-c: CN2008-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: MNT-CUSTODIAN
created: 2009-12-16T10:53:17Z
last-modified: 2026-03-20T11:03:05Z
source: RIPE
organisation: ORG-CL129-RIPE
org-name: CustodianDC Limited
country: GB
reg-nr: 07878023
org-type: LIR
address: Unit 11 Newtons Court, Crossways Business Park
address: DA2 6QL
address: Dartford
address: UNITED KINGDOM
phone: +441622230382
fax-no: +441622684411
admin-c: JC12575-RIPE
admin-c: MH7372-RIPE
admin-c: RW2316-RIPE
admin-c: CN2008-RIPE
abuse-c: CN2008-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: MNT-CUSTODIAN
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MNT-CUSTODIAN
created: 2009-11-05T15:54:29Z
last-modified: 2026-05-13T07:43:31Z
source: RIPE # Filtered
role: Custodian NOC
org: ORG-CL129-RIPE
address: Custodian DataCentre Ltd.
address: Maidstone TV Studios
address: ME14 5NZ Maidstone
address: UNITED KINGDOM
abuse-mailbox: abuse@CustodianDC.com
nic-hdl: CN2008-RIPE
admin-c: JC12575-RIPE
admin-c: MH7372-RIPE
admin-c: RW2316-RIPE
tech-c: JC12575-RIPE
tech-c: MH7372-RIPE
tech-c: RW2316-RIPE
remarks: --------------------------------------------------
remarks: Contact Addresses By Category:
remarks: --------------------------------------------------
remarks: Peering: peering@CustodianDC.com
remarks: DNS: dns@CustodianDC.com
remarks: Abuse: abuse@CustodianDC.com
remarks: General Support: support@CustodianDC.com
remarks: --------------------------------------------------
created: 2010-10-28T10:41:52Z
last-modified: 2025-09-01T16:13:04Z
source: RIPE # Filtered
mnt-by: MNT-CUSTODIAN
% This query was served by the RIPE Database Query Service version 1.122.1 (BUSA)