Report for 18305

Name

POSNET-KR - POSCO DX, KR

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS6447) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

18305 POSNET POSCO DX, KR

  Adjacency:     5  Upstream:     5  Downstream:     0
  Upstream Adjacent AS list
    AS4766          KIXS-AS-KR Korea Telecom, KR
    AS13335         CLOUDFLARENET, US
    AS9318          SKB-AS SK Broadband Co Ltd, KR
    AS9848          SEJONGTELECOM-AS-KR SEJONG NETWORKS, KR
    AS3786          LGDACOM LG DACOM Corporation, KR

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2842  AS18305        ORIGIN  Originate:      75520 /15.80  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       %
 8609 AS18305       POSNET POSCO DX, KR                               62      9      4     57      5   8.06%


  Prefix               AS Path                              Aggregation Suggestion
  1.209.29.0/24        2497 4766 18305 18305 18305 18305 18305 18305   
  1.209.181.0/24       2497 9318 18305        
  1.209.182.0/24       2497 9318 18305        
  1.209.183.0/24       57866 13335 18305      
  1.209.185.0/24       2497 4766 18305 18305 18305 18305 18305 18305   
  39.121.111.0/24      2497 9318 18305 18305 18305 18305 18305 18305   
  116.123.216.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  116.124.169.0/24     2497 4766 18305        
  116.127.24.0/24      2497 4766 18305 18305 18305 18305 18305 18305   
  118.129.142.0/24     2497 3786 18305 18305 18305 18305 18305 18305   
  118.129.143.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  119.202.117.0/24     2497 9318 18305        
  175.202.208.0/24     2497 9318 18305        
  175.202.211.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  175.202.212.0/24     2914 3786 18305 18305 18305 18305 18305 18305   
  175.202.213.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  203.231.144.0/23     293 6453 9848 18305 18305 + Announce - aggregate of 203.231.144.0/24 (293 6453 9848 18305 18305) and 203.231.145.0/24 (293 6453 9848 18305 18305)
  203.231.144.0/24     293 6453 9848 18305 18305 - Withdrawn - aggregated with 203.231.145.0/24 (293 6453 9848 18305 18305)
  203.231.145.0/24     293 6453 9848 18305 18305 - Withdrawn - aggregated with 203.231.144.0/24 (293 6453 9848 18305 18305)
  203.231.146.0/24     293 6453 9848 18305 18305   
  203.231.147.0/24     2497 9318 18305 18305   
  203.231.148.0/23     293 6453 9848 18305 18305 + Announce - aggregate of 203.231.148.0/24 (293 6453 9848 18305 18305) and 203.231.149.0/24 (293 6453 9848 18305 18305)
  203.231.148.0/24     293 6453 9848 18305 18305 - Withdrawn - aggregated with 203.231.149.0/24 (293 6453 9848 18305 18305)
  203.231.149.0/24     293 6453 9848 18305 18305 - Withdrawn - aggregated with 203.231.148.0/24 (293 6453 9848 18305 18305)
  203.231.151.0/24     2497 4766 18305        
  203.238.192.0/21     2497 9318 18305 18305 18305 18305 18305 18305   
  203.238.200.0/22     2497 9318 18305 18305 18305 18305 18305 18305   
  203.238.204.0/23     2497 4766 18305 18305 18305 18305 18305 18305 + Announce - aggregate of 203.238.204.0/24 (2497 4766 18305 18305 18305 18305 18305 18305) and 203.238.205.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  203.238.204.0/24     2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.238.205.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  203.238.205.0/24     2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 203.238.204.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  203.238.206.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  203.238.207.0/24     2497 4766 18305        
  203.238.210.0/24     293 6453 9848 18305 18305   
  203.238.219.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  203.238.220.0/22     2497 9318 18305 18305 18305 18305 18305 18305   
  203.238.221.0/24     2497 9318 18305 18305 18305 18305 18305 18305 - Withdrawn - matching aggregate 203.238.220.0/22 2497 9318 18305 18305 18305 18305 18305 18305
  203.241.0.0/19       2497 9318 18305 18305 18305 18305 18305 18305   
  203.244.32.0/19      2497 4766 18305 18305 18305 18305 18305 18305   
  203.244.64.0/19      2497 4766 18305 18305 18305 18305 18305 18305   
  203.245.128.0/17     2497 9318 18305 18305 18305 18305 18305 18305   
  203.246.184.0/24     2914 9318 18305 18305 18305 18305 18305 18305   
  203.246.185.0/24     2497 9318 18305 18305 18305 18305 18305 18305   
  203.246.186.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  203.246.187.0/24     53767 13335 18305      
  203.246.188.0/24     2497 9318 18305 18305 18305 18305 18305 18305   
  203.246.189.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  210.105.154.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  210.108.50.0/24      2497 4766 18305 18305   
  210.108.199.0/24     2497 4766 18305 18305 18305 18305 18305 18305 18305   
  210.109.175.0/24     2497 3786 18305 18305 18305 18305 18305 18305   
  210.113.156.0/23     2497 4766 18305 18305 18305 18305 18305 18305 + Announce - aggregate of 210.113.156.0/24 (2497 4766 18305 18305 18305 18305 18305 18305) and 210.113.157.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  210.113.156.0/24     2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 210.113.157.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  210.113.157.0/24     2497 4766 18305 18305 18305 18305 18305 18305 - Withdrawn - aggregated with 210.113.156.0/24 (2497 4766 18305 18305 18305 18305 18305 18305)
  211.32.161.0/24      2497 4766 18305 18305 18305 18305 18305 18305   
  211.32.162.0/24      2497 4766 18305 18305 18305 18305 18305 18305   
  211.32.165.0/24      2497 4766 18305 18305 18305 18305 18305 18305   
  211.60.10.0/24       2497 4766 18305 18305 18305 18305 18305 18305   
  211.169.135.0/24     2497 4766 18305 18305 18305 18305 18305 18305 18305   
  211.171.31.0/24      2497 9318 18305 18305 18305 18305 18305 18305   
  211.171.182.0/24     2497 9318 18305 18305 18305 18305 18305 18305   
  211.171.185.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  211.171.186.0/24     2497 4766 18305 18305 18305 18305 18305 18305   
  211.171.187.0/24     2497 4766 18305 18305 18305 18305 18305 18305 18305   
  211.229.145.0/24     2497 9318 18305 18305   
  222.104.91.0/24      2497 4766 18305 18305   
  222.104.92.0/24      2497 4766 18305 18305 18305 18305 18305 18305   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS18305   49 More Specifics   53 Total Advertisements   POSNET POSCO DX, KR
    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
    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
    203.238.192.0/21              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
    203.238.210.0/24              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
    211.32.165.0/24               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
    211.171.182.0/24              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
    211.227.203.0/24              211.226.0.0/15
    211.229.145.0/24              211.228.0.0/14
    222.104.91.0/24               222.96.0.0/12
    222.104.92.0/24               222.96.0.0/12
    203.231.145.64/27             203.231.0.0/16
    203.231.146.224/27            203.231.0.0/16
    203.231.151.0/24              203.231.0.0/16
    203.238.206.0/24              203.238.192.0/19
    203.238.207.0/24              203.238.192.0/19
    211.32.162.0/24               211.32.0.0/16
    211.171.31.0/25               211.168.0.0/14
    211.171.173.0/25              211.168.0.0/14

Prefixes added and withdrawn by this origin AS in the past 7 days.

    + 211.227.203.0/24            Announced
    - 203.231.145.64/27           Withdrawn
    - 203.231.146.224/27          Withdrawn
    - 203.231.151.0/24            Withdrawn
    - 203.238.206.0/24            Withdrawn
    - 203.238.207.0/24            Withdrawn
    - 211.32.162.0/24             Withdrawn
    - 211.171.31.0/25             Withdrawn
    - 211.171.173.0/25            Withdrawn

Whois Entry

whois: 402603

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 1.88.48 (WHOIS-AU5)