Report for 18131

Name

DXNW - NTT DOCOMO BUSINESS, Inc., JP

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 AS4637) 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.

18131 JPNIC-ASBLOCK-AP JPNIC

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS2914    NTT-COMMUNICATIONS-2914 - NTT America, Inc.

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
17404 AS18131  ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  JPNIC-ASBLOCK-AP JPNIC

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       %
12200 AS18131 JPNIC-ASBLOCK-AP JPNIC                        2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  138.243.255.0/24     4637 3491 2914 18131   
  192.47.166.0/24      4637 3491 2914 18131   

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

AS18131   1 More Specifics   2 Total Advertisements   JPNIC-ASBLOCK-AP JPNIC
    138.243.255.0/24              138.243.0.0/16

Whois Entry

whois: 402617

IANA has recorded AS18131 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS18131\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 'AS18121 - AS18152'
             
             as-block:       AS18121 - AS18152
             descr:          JPNIC-2Byte-ASBLOCK-AP
             descr:          for assignment to JPNIC members
             country:        JP
             admin-c:        JNIC1-AP
             tech-c:         JNIC1-AP
             remarks:        Authoritative information regarding AS Number
             remarks:        assignments made from within this block can be
             remarks:        queried at whois.nic.ad.jp.
             remarks:        To only display English output,
             remarks:        add '/e' at the end of command,
             remarks:        e.g. 'whois -h whois.nic.ad.jp xxx/e'.
             mnt-by:         APNIC-HM
             mnt-lower:      MAINT-JPNIC
             last-modified:  2017-06-12T03:54:32Z
             source:         APNIC
             
             role:           Japan Network Information Center
             address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
             address:        Chiyoda-ku, Tokyo 101-0047, Japan
             country:        JP
             phone:          +81-3-5297-2311
             fax-no:         +81-3-5297-2312
             e-mail:         hostmaster@nic.ad.jp
             admin-c:        JI13-AP
             tech-c:         JE53-AP
             nic-hdl:        JNIC1-AP
             mnt-by:         MAINT-JPNIC
             last-modified:  2022-01-05T03:04:02Z
             source:         APNIC
             
             % Information related to 'AS18131'
             
             aut-num:        AS18131
             as-name:        DXNW
             descr:          NTT DOCOMO BUSINESS, Inc.
             import:
             export:
             country:        JP
             admin-c:        JP00251121
             tech-c:         JP00251121
             last-modified:  2025-09-10T18:13:25Z
             remarks:        This information has been partially mirrored by APNIC from
             remarks:        JPNIC. To obtain more specific information, please use the
             remarks:        JPNIC WHOIS Gateway at
             remarks:        http://www.nic.ad.jp/en/db/whois/en-gateway.html or
             remarks:        whois.nic.ad.jp for WHOIS client. (The WHOIS client
             remarks:        defaults to Japanese output, use the /e switch for English
             remarks:        output)
             source:         JPNIC
             
             % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU5)