AS Name
CSK
Org Name
CSK-IT MANAGEMENT CORPORATION
Registry Region
Japan
Looking Glass
IPv4Prefixes

7

IPv6Prefixes

1

IPv4 NUMs

45,056

IPv6 NUMs(/64)

4,294,967,296

45,056 IPv4 Addresses
CIDR Description IP Num
203.140.0.0/19 JPNIC-NET-JP Japan Network Information Center 8192
203.179.32.0/19 JPNIC-NET-JP Japan Network Information Center 8192
210.159.96.0/19 JPNIC-NET-JP Japan Network Information Center 8192
210.166.96.0/19 JPNIC-NET-JP Japan Network Information Center 8192
210.249.192.0/19 JPNIC-NET-JP Japan Network Information Center 8192
211.7.192.0/21 JPNIC-NET-JP Japan Network Information Center 2048
211.7.208.0/21 JPNIC-NET-JP Japan Network Information Center 2048
CIDR Description IP NUMs(prefix /64)
2400:af80::/32 CSK-ITO-JPNIC-JP-20140303 Japan Network Information Center 4294967296
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS35280 ACORUS - ACORUS NETWORKS SAS, FR France 7,680 81,604,378,624 IPv4 IPv4 IPv6 IPv6
AS2914 NTT-COMMUNICATIONS-2914 - NTT America, Inc., US United States 6,968,064 21,743,796,736 IPv6 IPv6
AS17676 GIGAINFRA - Softbank BB Corp., JP Japan 43,377,408 18,695,992,639,488 IPv4 IPv4 IPv6 IPv6
AS17680 SCS - SCSK Corporation, JP Japan 6,144 0 IPv4 IPv4
AS36236 NETACTUATE - NetActuate, Inc, US United States 98,560 5,933,563,904 IPv4 IPv4 IPv6 IPv6
AS2497 IIJ - Internet Initiative Japan Inc., JP Japan 3,802,368 17,716,740,096 IPv6 IPv6
AS38001 NEWMEDIAEXPRESS-AS-AP - NewMedia Express Pte Ltd, SG Singapore 27,136 4,295,294,976 IPv6 IPv6
AS9957 KINX-AS - KINX, KR Republic of Korea 5,888 0 IPv4 IPv4
AS25152 K-ROOT-SERVER - Reseaux IP Europeens Network Coordination Centre (RIPE NCC), NL Netherlands 512 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS4637 ASN-TELSTRA-GLOBAL - Telstra International Limited, HK Hong Kong 526,080 17,180,065,792 IPv6 IPv6
AS6233 XTOM, US United States 5,376 1,179,648 IPv4 IPv4 IPv6 IPv6
AS9009 M247 - M247 Ltd, GB United Kingdom 1,027,072 339,766,542,592 IPv4 IPv4
AS24482 SGGS-AS-AP - SG.GS, SG Singapore 22,784 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS7713 telkomnet-as-ap - Telekomunikasi Indonesia (PT), ID Indonesia 3,404,544 12,888,178,688 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 518,656 286,144,143,556,608 IPv4 IPv4 IPv6 IPv6
AS8220 COLT - COLT Technology Services Group Limited, GB United Kingdom 1,136,128 21,475,164,160 IPv4 IPv4 IPv6 IPv6
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS17680 SCS - SCSK Corporation, JP Japan 6,144 0 IPv4 IPv4

Peers at this Exchange Point

Country/Region IX IPv4 IPv6 Port Speed Updated
Japan JPNAP Tokyo - JPNAP Tokyo 210.173.176.39 2001:7fa:7:1::4693:1 10 Gbps 2019-06-03 04:00:14
Japan JPIX TOKYO - Japan Internet Exchange Tokyo 210.171.224.100 2001:de8:8::4693:1 10 Gbps 2019-06-03 04:00:14
Japan BBIX Tokyo - BroadBand Internet eXchange Tokyo 218.100.7.43 2001:de8:c::4693:1 10 Gbps 2019-06-03 03:59:27

Private Peering Facilities

Country/Region Name City Website Updated
IP Address Domain NUMs Domains
203.140.1.178 1 www.hc-kohnan.co.jp
203.140.10.10 1 ns2.highway.ne.jp
203.140.10.140 1 dns1.csk.net
203.140.10.141 1 dns2.csk.net
203.140.10.149 1 www.csk.net
203.140.13.97 1 inetweb01.csk.net
203.140.13.99 1 inetmng01.csk.net
203.140.21.66 1 sharefile.tokyo.dtfa.jp
203.140.21.69 1 ftc.tokyo.dtfa.jp
203.140.21.104 1 elk.scgcservice.com
as-block:       AS4608 - AS4865
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:  2019-05-20T03:52:26Z
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:         [email protected]
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         [email protected]
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC


as-block:       AS4672 - AS4735
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:  2017-06-12T03:54:29Z
source:         APNIC

role:           Japan Network Information Center
address:        Urbannet-Kanda Bldg 4F
address:        3-6-2 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047,Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         [email protected]
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2012-08-28T07:58:02Z
source:         APNIC


aut-num:        AS4693
as-name:        CSK
descr:          CSK-IT MANAGEMENT CORPORATION
import:
export:
country:        JP
admin-c:        TH9886JP
tech-c:         TH9886JP
last-modified:  2010-02-05T02:02:22Z
source:         JPNIC