203.112.64.0/21

AS2907 · Research Organization of Information and Systems, National Institute of Informatics

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Summary

Country	Japan
Domain	chikushi-u.ac.jp
ASN	AS2907
Registry	APNIC
ID	CKADMIN

WHOIS Details

inetnum:        203.112.64.0 - 203.112.71.255
netname:        CKADMIN
descr:          Chikushi Jogakuen University Network,
descr:          Dazaifu, Fukuoka, Japan
country:        JP
org:            ORG-CJU1-AP
admin-c:        YY3061-AP
tech-c:         SY2812-AP
abuse-c:        AC2164-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-JP-CKADMIN
mnt-routes:     MAINT-JP-CKADMIN
mnt-irt:        IRT-CKADMIN-JP
last-modified:  2020-10-20T01:08:41Z
source:         APNIC

irt:            IRT-CKADMIN-JP
address:        2-12-1, Ishizaka, Dazaifu, Fukuoka,Japan
e-mail:         admin_tech@chikushi-u.ac.jp
abuse-mailbox:  admin_tech@chikushi-u.ac.jp
admin-c:        YY3061-AP
tech-c:         SY2812-AP
auth:           # Filtered
remarks:        admin_tech@chikushi-u.ac.jp was validated on 2025-11-26
mnt-by:         MAINT-JP-CKADMIN
last-modified:  2025-11-26T15:50:26Z
source:         APNIC

organisation:   ORG-CJU1-AP
org-name:       Chikushi Jogakuen University
org-type:       LIR
country:        JP
address:        2-12-1, Ishizaka
phone:          +81-92-925-9944
fax-no:         +81-92-925-3153
e-mail:         admin_tech@chikushi-u.ac.jp
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:08Z
source:         APNIC

role:           ABUSE CKADMINJP
country:        ZZ
address:        2-12-1, Ishizaka, Dazaifu, Fukuoka,Japan
phone:          +000000000
e-mail:         admin_tech@chikushi-u.ac.jp
admin-c:        YY3061-AP
tech-c:         SY2812-AP
nic-hdl:        AC2164-AP
remarks:        Generated from irt object IRT-CKADMIN-JP
remarks:        admin_tech@chikushi-u.ac.jp was validated on 2025-11-26
abuse-mailbox:  admin_tech@chikushi-u.ac.jp
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-26T15:50:55Z
source:         APNIC

person:         shusuke YOSHIDA
address:        2-12-1, Ishizaka, Dazaifu, Fukuoka,Japan
country:        JP
phone:          +81-92-925-9944
e-mail:         sh-yoshida@chikushi-u.ac.jp
nic-hdl:        SY2812-AP
mnt-by:         MAINT-JP-CKADMIN
last-modified:  2015-04-22T03:47:40Z
source:         APNIC

person:         Yoshitaka YOSHINO
address:        2-12-1, Ishizaka, Dazaifu, Fukuoka,Japan
country:        JP
phone:          +81-92-925-9944
e-mail:         yo-yoshi@chikushi-u.ac.jp
nic-hdl:        YY3061-AP
mnt-by:         MAINT-JP-CKADMIN
last-modified:  2015-04-22T01:23:47Z
source:         APNIC

route:          203.112.64.0/21
descr:          Chikushi Jogakuen University
country:        JP
origin:         AS37984
notify:         admin_tech@chikushi-u.ac.jp
mnt-by:         MAINT-JP-CKADMIN
last-modified:  2011-05-08T18:56:22Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.112.0.0/16

Range	ASN	Company	Num of IPs
203.112.224.0/19	AS4637	Telstra Global Internet Services Network Blocks	8,192
203.112.192.0/19	AS45588	Internet Access & Telecom Carrier Service Provider.	8,192
203.112.160.0/19	AS9226	1-NET ISP Services Network.	8,192
203.112.32.0/19	AS7522	STNet, Incorporated	8,192
203.112.0.0/19	AS4685	ASAHI Net,Inc.	8,192
203.112.192.0/19	AS17494	Internet Access & Telecom Carrier Service Provider.	8,192
203.112.136.0/21	AS17439	Netmagic IT Services Pvt Ltd	2,048
203.112.72.0/21	AS38031	OptiMax COmmunication Ltd	2,048
203.112.132.0/22	AS140641	YOTTA NETWORK SERVICES PRIVATE LIMITED	1,024
203.112.156.0/22	AS140641	YOTTA NETWORK SERVICES PRIVATE LIMITED	1,024
203.112.77.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.78.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.79.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.76.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.75.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.231.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
203.112.235.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
203.112.236.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
203.112.237.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
203.112.74.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.73.0/24	AS38031	Md. Emdadul Hoque Molla	256
203.112.72.0/24	AS38031	Md. Emdadul Hoque Molla	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

10 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.112.64.1	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`12.83ms` from Osaka, JP

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
174.85.254.117	AS20115 Charter Communications LLC	`16.75ms` from Atlanta, US
172.102.177.149	AS25853 Ellijay Telephone Company	`6.54ms` from Atlanta, US
71.29.189.21	AS7029 Windstream Communications LLC	`13.44ms` from Chicago, US
181.88.70.101	AS7303 Telecom Argentina S.A.	`0.24ms` from Cordoba, AR
88.152.135.245	AS3209 Vodafone GmbH	`11.93ms` from Frankfurt am Main, DE
121.80.98.181	AS17511 OPTAGE Inc.	`1.16ms` from Osaka, JP
54.164.209.213	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
180.226.44.5	AS17858 LG POWERCOMM	`2.06ms` from Seoul, KR
72.137.208.53	AS812 Rogers Communications Canada Inc.	`5.79ms` from Toronto, CA
86.95.174.245	AS1136 KPN B.V.	`1.06ms` from Amsterdam, NL
173.223.228.21	AS16625 Akamai Technologies, Inc.	`0.10ms` from Auckland, NZ
183.173.89.245	AS4538 China Education and Research Network Center	`4.92ms` from Beijing, CN
218.205.130.37	AS56048 China Mobile Communicaitons Corporation	`2.45ms` from Beijing, CN
154.180.248.53	AS8452 TE-AS	`7.83ms` from Cairo, EG
24.199.142.85	AS11426 Charter Communications Inc	`6.97ms` from Charlotte, US
47.161.3.69	AS5650 Frontier Communications of America, Inc.	`1.59ms` from Dallas, US
34.252.42.117	AS16509 Amazon.com, Inc.	`0.16ms` from Dublin, IE
223.16.131.5	AS9304 HGC Global Communications Limited	`1.08ms` from Hong Kong, HK
86.172.189.133	AS2856 British Telecommunications PLC	`5.16ms` from London, GB
35.241.17.197	AS396982 Google LLC	`0.07ms` from Melbourne, AU
110.72.113.5	AS4837 CHINA UNICOM China169 Backbone	`3.65ms` from Nanning, CN
24.161.26.149	AS12271 Charter Communications Inc	`8.53ms` from Newark, US
34.15.11.85	AS396982 Google LLC	`8.92ms` from Oudeschip, NL
2.239.53.181	AS12874 Fastweb SpA	`18.52ms` from Rome, IT
143.225.132.5	AS137 Consortium GARR	`5.34ms` from Rome, IT

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -m9 203.112.70.13

traceroute to 203.112.70.13 (203.112.70.13): 9 hops max, 52 byte packets

1 [AS132372] 103.161.133.253 0.505 ms

2 *

3 *

4 [] 101.203.89.206 85.51 ms

5 [AS2907] 150.99.20.146 104.199 ms

6 [AS2907] 150.99.193.58 105.388 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Sepang, MY

On December 14th 2025

What are IP address ranges?

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