18305 POSNET POSCO DX, KR
Adjacency: 5 Upstream: 5 Downstream: 0
Upstream Adjacent AS list
AS13335 CLOUDFLARENET - Cloudflare, Inc., US
AS3786 LGDACOM LG DACOM Corporation, KR
AS9318 SKB-AS SK Broadband Co Ltd, KR
AS4766 KIXS-AS-KR Korea Telecom, KR
AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS, KR
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 2834 AS18305 ORIGIN Originate: 75776 /15.79 Transit: 0 /0.00 POSNET POSCO DX, KR
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 % 7240 AS18305 POSNET POSCO DX, KR 64 11 5 58 6 9.38% Prefix AS Path Aggregation Suggestion 1.209.29.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 1.209.181.0/24 4777 2497 9318 18305 1.209.182.0/24 4777 2497 9318 18305 1.209.183.0/24 4777 13335 18305 1.209.185.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 39.121.111.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 116.123.216.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 116.124.169.0/24 4777 2497 4766 18305 116.127.24.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 118.129.142.0/24 4777 2497 3786 18305 18305 18305 18305 18305 18305 118.129.143.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 119.202.117.0/24 4777 2497 9318 18305 175.202.208.0/24 4777 2497 9318 18305 175.202.211.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 175.202.212.0/24 4777 2497 3786 18305 18305 18305 18305 18305 18305 175.202.213.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.231.144.0/23 4777 2516 58453 9848 18305 18305 + Announce - aggregate of 203.231.144.0/24 (4777 2516 58453 9848 18305 18305) and 203.231.145.0/24 (4777 2516 58453 9848 18305 18305) 203.231.144.0/24 4777 2516 58453 9848 18305 18305 - Withdrawn - aggregated with 203.231.145.0/24 (4777 2516 58453 9848 18305 18305) 203.231.145.0/24 4777 2516 58453 9848 18305 18305 - Withdrawn - aggregated with 203.231.144.0/24 (4777 2516 58453 9848 18305 18305) 203.231.146.0/24 4777 2516 58453 9848 18305 18305 203.231.147.0/24 4777 2497 9318 18305 18305 203.231.148.0/23 4777 2516 58453 9848 18305 18305 + Announce - aggregate of 203.231.148.0/24 (4777 2516 58453 9848 18305 18305) and 203.231.149.0/24 (4777 2516 58453 9848 18305 18305) 203.231.148.0/24 4777 2516 58453 9848 18305 18305 - Withdrawn - aggregated with 203.231.149.0/24 (4777 2516 58453 9848 18305 18305) 203.231.149.0/24 4777 2516 58453 9848 18305 18305 - Withdrawn - aggregated with 203.231.148.0/24 (4777 2516 58453 9848 18305 18305) 203.231.151.0/24 4777 2497 4766 18305 203.238.192.0/21 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.238.200.0/22 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.238.204.0/23 4777 2497 4766 18305 18305 18305 18305 18305 18305 + Announce - aggregate of 203.238.204.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) and 203.238.205.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 203.238.204.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.238.205.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 203.238.205.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.238.204.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 203.238.206.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.238.207.0/24 4777 2497 4766 18305 203.238.210.0/24 4777 2516 58453 9848 18305 18305 203.238.219.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.238.220.0/22 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.238.221.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 - Withdrawn - matching aggregate 203.238.220.0/22 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.241.0.0/19 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.244.32.0/19 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.244.64.0/19 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.245.128.0/17 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.246.184.0/23 4777 2497 9318 18305 18305 18305 18305 18305 18305 + Announce - aggregate of 203.246.184.0/24 (4777 2497 9318 18305 18305 18305 18305 18305 18305) and 203.246.185.0/24 (4777 2497 9318 18305 18305 18305 18305 18305 18305) 203.246.184.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.246.185.0/24 (4777 2497 9318 18305 18305 18305 18305 18305 18305) 203.246.185.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.246.184.0/24 (4777 2497 9318 18305 18305 18305 18305 18305 18305) 203.246.186.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 203.246.187.0/24 4777 13335 18305 203.246.188.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 203.246.189.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 210.105.154.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 210.108.50.0/24 4777 2497 4766 18305 18305 210.108.199.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 18305 210.109.175.0/24 4777 2497 3786 18305 18305 18305 18305 18305 18305 210.113.156.0/23 4777 2497 4766 18305 18305 18305 18305 18305 18305 + Announce - aggregate of 210.113.156.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) and 210.113.157.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 210.113.156.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 210.113.157.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 210.113.157.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 210.113.156.0/24 (4777 2497 4766 18305 18305 18305 18305 18305 18305) 211.32.161.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.32.162.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.32.165.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.60.10.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.169.135.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 18305 211.171.31.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 211.171.173.0/25 4777 2516 4766 18305 18305 211.171.182.0/24 4777 2497 9318 18305 18305 18305 18305 18305 18305 211.171.185.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.171.186.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 211.171.187.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305 18305 211.229.145.0/24 4777 2497 9318 18305 18305 220.122.214.0/25 4777 2516 4766 18305 18305 18305 18305 18305 18305 222.104.91.0/24 4777 2497 4766 18305 18305 222.104.92.0/24 4777 2497 4766 18305 18305 18305 18305 18305 18305
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS18305 60 More Specifics 64 Total Advertisements POSNET POSCO DX, KR
1.209.29.0/24 1.208.0.0/12
1.209.181.0/24 1.208.0.0/12
1.209.182.0/24 1.208.0.0/12
1.209.183.0/24 1.208.0.0/12
1.209.185.0/24 1.208.0.0/12
39.121.111.0/24 39.112.0.0/12
116.123.216.0/24 116.120.0.0/13
116.124.169.0/24 116.120.0.0/13
116.127.24.0/24 116.120.0.0/13
118.129.142.0/24 118.128.0.0/14
118.129.143.0/24 118.128.0.0/14
119.202.117.0/24 119.192.0.0/11
175.202.208.0/24 175.192.0.0/10
175.202.211.0/24 175.192.0.0/10
175.202.212.0/24 175.192.0.0/10
175.202.213.0/24 175.192.0.0/10
203.231.144.0/24 203.231.0.0/16
203.231.145.0/24 203.231.0.0/16
203.231.146.0/24 203.231.0.0/16
203.231.147.0/24 203.231.0.0/16
203.231.148.0/24 203.231.0.0/16
203.231.149.0/24 203.231.0.0/16
203.231.151.0/24 203.231.0.0/16
203.238.192.0/21 203.238.192.0/19
203.238.200.0/22 203.238.192.0/19
203.238.204.0/24 203.238.192.0/19
203.238.205.0/24 203.238.192.0/19
203.238.206.0/24 203.238.192.0/19
203.238.207.0/24 203.238.192.0/19
203.238.210.0/24 203.238.192.0/19
203.238.219.0/24 203.238.192.0/19
203.238.220.0/22 203.238.192.0/19
203.238.221.0/24 203.238.192.0/19
203.246.184.0/24 203.246.184.0/22
203.246.185.0/24 203.246.184.0/22
203.246.186.0/24 203.246.184.0/22
203.246.187.0/24 203.246.184.0/22
203.246.188.0/24 203.246.188.0/23
203.246.189.0/24 203.246.188.0/23
210.105.154.0/24 210.104.0.0/15
210.108.50.0/24 210.108.0.0/16
210.108.199.0/24 210.108.0.0/16
210.109.175.0/24 210.109.0.0/16
210.113.156.0/24 210.113.0.0/16
210.113.157.0/24 210.113.0.0/16
211.32.161.0/24 211.32.0.0/16
211.32.162.0/24 211.32.0.0/16
211.32.165.0/24 211.32.0.0/16
211.60.10.0/24 211.60.0.0/16
211.169.135.0/24 211.168.0.0/14
211.171.31.0/24 211.168.0.0/14
211.171.173.0/25 211.168.0.0/14
211.171.182.0/24 211.168.0.0/14
211.171.185.0/24 211.168.0.0/14
211.171.186.0/24 211.168.0.0/14
211.171.187.0/24 211.168.0.0/14
211.229.145.0/24 211.228.0.0/14
220.122.214.0/25 220.120.0.0/13
222.104.91.0/24 222.96.0.0/12
222.104.92.0/24 222.96.0.0/12
whois: 402332
IANA has recorded AS18305 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS18305\n % [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS17653 - AS18431'
as-block: AS17653 - AS18431
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2019-01-08T23:19:07Z
source: APNIC
role: APNIC Hostmaster
address: 6 Cordelia Street
address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
fax-no: +61 7 3858 3199
e-mail: helpdesk@apnic.net
admin-c: AMS11-AP
tech-c: AH256-AP
nic-hdl: HM20-AP
remarks: Administrator for APNIC
notify: hostmaster@apnic.net
mnt-by: MAINT-APNIC-AP
last-modified: 2013-10-23T04:06:51Z
source: APNIC
% Information related to 'AS18294 - AS18343'
as-block: AS18294 - AS18343
descr: KRNIC-ASBLOCK-AP
descr: KRNIC
descr: Korea Network Information Center
country: KR
admin-c: HM127-AP
tech-c: HM127-AP
remarks: Authoritative information regarding AS Number
remarks: assignments made from within this block can also be
remarks: queried at whois.nic.or.kr
mnt-by: APNIC-HM
mnt-lower: MNT-KRNIC-AP
last-modified: 2017-06-15T04:25:42Z
source: APNIC
person: Host Master
address: Jeollanam-do Naju-si Jinheung-gil
country: KR
phone: +82-2-405-5118
e-mail: hostmaster@nic.or.kr
nic-hdl: HM127-AP
mnt-by: MNT-KRNIC-AP
last-modified: 2019-05-22T01:20:31Z
source: APNIC
% Information related to 'AS18305'
% Abuse contact for 'AS18305' is 'irt@nic.or.kr'
aut-num: AS18305
as-name: POSNET
descr: POSCO DX
country: KR
admin-c: AM1776-AP
tech-c: AM1776-AP
import: from AS3786
action pref=10;
accept ANY
import: from AS4766
action pref=10;
accept ANY
export: to AS3786
announce AS18305
export: to AS4766
announce AS18305
mnt-by: MNT-KRNIC-AP
mnt-irt: IRT-KRNIC-KR
last-modified: 2023-09-05T01:10:03Z
source: APNIC
irt: IRT-KRNIC-KR
address: 9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail: irt@nic.or.kr
abuse-mailbox: irt@nic.or.kr
admin-c: IM574-AP
tech-c: IM574-AP
auth: # Filtered
remarks: irt@nic.or.kr was validated on 2020-04-09
mnt-by: MNT-KRNIC-AP
last-modified: 2025-09-04T01:00:01Z
source: APNIC
person: AS Manager
address: Gyeongsangbuk-do Nam-gu, Pohang-si Hodong-ro 68
country: KR
phone: +82-31-723-2994
e-mail: hthoon@poscoict.com
nic-hdl: AM1776-AP
mnt-by: MNT-KRNIC-AP
last-modified: 2017-10-10T00:49:27Z
source: APNIC
% Information related to 'AS18305'
aut-num: AS18305
as-name: POSNET-KR
descr: POSCO DX
country: KR
import: from 3786 action pref=10 accept ANY
import: from 4766 action pref=10 accept ANY
export: to 3786 announce NEW
export: to 4766 announce NEW
admin-c: A467-KR
tech-c: A467-KR
mnt-by: MNT-KRNIC-AP
mnt-irt: IRT-KRNIC-KR
remarks: This information has been partially mirrored by APNIC from
remarks: KRNIC. To obtain more specific information, please use the
remarks: KRNIC whois server at whois.kisa.or.kr.
source: KRNIC
person: AS Manager
address: Gyeongsangbuk-do Nam-gu, Pohang-si Hodong-ro 68
address: POSCO DX
country: KR
phone: +82-31-723-2994
e-mail: hthoon@poscoict.com
nic-hdl: A467-KR
mnt-by: MNT-KRNIC-AP
changed: hostmaster@nic.or.kr 20240912
remarks: This information has been partially mirrored by APNIC from
remarks: KRNIC. To obtain more specific information, please use the
remarks: KRNIC whois server at whois.kisa.or.kr.
source: KRNIC
% This query was served by the APNIC Whois Service version 1.88.36-SNAPSHOT (WHOIS-AU5)