Report for 1781

Name

KAIST-DAEJEON-AS-KR Korea Advanced Institute of Science and Technology, 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 AS2.0) 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.

1781 KAIST-DAEJEON-AS-KR Korea Advanced Institute of Science and Technology, KR

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS3786          LGDACOM LG DACOM Corporation, KR
    AS4766          KIXS-AS-KR Korea Telecom, KR

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1559  AS1781         ORIGIN  Originate:     155648 /14.75  Transit:          0 /0.00  KAIST-DAEJEON-AS-KR Korea Advanced Institute of Science and Technology, 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       %
12067 AS1781        KAIST-DAEJEON-AS-KR Korea Advanced Institute       8      4      1      5      3  37.50%


  Prefix               AS Path                              Aggregation Suggestion
  137.68.0.0/18        4777 2497 4766 1781    
  143.248.0.0/16       4777 2497 4766 1781    
  143.248.0.0/18       4777 2497 4766 1781  - Withdrawn - matching aggregate 143.248.0.0/16 4777 2497 4766 1781
  143.248.64.0/18      4777 2497 4766 1781  - Withdrawn - matching aggregate 143.248.0.0/16 4777 2497 4766 1781
  143.248.128.0/17     4777 2497 3786 1781  + Announce - aggregate of 143.248.128.0/18 (4777 2497 3786 1781) and 143.248.192.0/18 (4777 2497 3786 1781)
  143.248.128.0/18     4777 2497 3786 1781  - Withdrawn - aggregated with 143.248.192.0/18 (4777 2497 3786 1781)
  143.248.192.0/18     4777 2497 3786 1781  - Withdrawn - aggregated with 143.248.128.0/18 (4777 2497 3786 1781)
  192.249.16.0/20      4777 2497 4766 1781    
  210.107.128.0/20     4777 2497 4766 1781    

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

AS1781   6 More Specifics   8 Total Advertisements   KAIST-DAEJEON-AS-KR Korea Advanced Institute of Science and Technology, KR
    137.68.0.0/18                 137.68.0.0/16
    143.248.0.0/18                143.248.0.0/16
    143.248.64.0/18               143.248.0.0/16
    143.248.128.0/18              143.248.0.0/16
    143.248.192.0/18              143.248.0.0/16
    210.107.128.0/20              210.107.128.0/17

Whois Entry

whois: 402332

IANA has recorded AS1781 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS1781\n             % [whois.apnic.net]
             % Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html
             
             % Information related to 'AS1781'
             
             % Abuse contact for 'AS1781' is 'irt@nic.or.kr'
             
             aut-num:        AS1781
             as-name:        KAIST-DAEJEON-AS-KR
             descr:          Korea Advanced Institute of Science and Technology
             country:        KR
             admin-c:        AM1935-AP
             tech-c:         AM1935-AP
             import:         from AS1237
                             action pref=100;
                             accept ANY
             import:         from AS9318
                             action pref=100;
                             accept ANY
             export:         to AS1237
                             announce AS1781
             export:         to AS9318
                             announce AS1781
             mnt-by:         MNT-KRNIC-AP
             mnt-irt:        IRT-KRNIC-KR
             last-modified:  2023-08-23T09:00:02Z
             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:        Daejeon Yuseong-gu Daehak-ro 291
             country:        KR
             phone:          +82-42-350-2412
             e-mail:         network@kaist.ac.kr
             nic-hdl:        AM1935-AP
             mnt-by:         MNT-KRNIC-AP
             last-modified:  2025-11-06T02:26:03Z
             source:         APNIC
             
             % Information related to 'AS1781'
             
             aut-num:        AS1781
             as-name:        KAIST-DAEJEON-AS-KR-KR
             descr:          Korea Advanced Institute of Science and Technology
             country:        KR
             import:         from AS9318 action pref=100 accept ANY
             import:         from AS1237 action pref=100 accept ANY
             export:         to AS9318 announce AS1781
             export:         to AS1237 announce AS1781
             admin-c:        TY3-KR
             tech-c:         TY3-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:        Daejeon Yuseong-gu Daehak-ro 291
             address:        KAIST
             country:        KR
             phone:          +82-42-350-2412
             e-mail:         network@kaist.ac.kr
             nic-hdl:        TY3-KR
             mnt-by:         MNT-KRNIC-AP
             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 1.88.47 (WHOIS-AU4)