203.223.24.0/21

AS9999 · AT TOKYO Corporation

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Summary

Country	Japan
Domain	attokyo.ad.jp
ASN	AS9999
Registry	APNIC
ID	ATTOKYO

WHOIS Details

inetnum:        203.223.24.0 - 203.223.31.255
netname:        ATTOKYO
descr:          AT TOKYO Corporation
descr:          5-6-36,SIA Toyosu Prime Square,Toyosu,Koto-ku,Tokyo 135-0061, Japan
country:        JP
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
status:         ALLOCATED PORTABLE
remarks:        Email address for spam or abuse complaints : jpnic2006@attokyo.ad.jp
mnt-irt:        IRT-JPNIC-JP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
last-modified:  2012-06-06T04:20:02Z
source:         APNIC

irt:            IRT-JPNIC-JP
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
e-mail:         hostmaster@nic.ad.jp
abuse-mailbox:  hostmaster@nic.ad.jp
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
auth:           # Filtered
remarks:        hostmaster@nic.ad.jp was validated on 2020-07-23
mnt-by:         MAINT-JPNIC
last-modified:  2022-06-14T04:26:58Z
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

inetnum:        203.223.24.0 - 203.223.31.255
netname:        ATTOKYO-CIDR-BLK-JP
descr:          AT TOKYO Corporation
remarks:        Email address for spam or abuse complaints : jpnic2006@attokyo.ad.jp
country:        JP
admin-c:        JP00010132
tech-c:         JP00010132
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)
last-modified:  2012-06-06T19:37:38Z
source:         JPNIC

Nearby Ranges

BGP prefixes that overlap with 203.223.0.0/16

Range	ASN	Company	Num of IPs
203.223.96.0/19	AS18313	LG HelloVision Corp.	8,192
203.223.128.0/19	AS24218	Global Transit Communications, Malaysia, Networks - 203.223.128.0/19	8,192
203.223.96.0/19	AS38091	LG HelloVision Corp.	8,192
203.223.32.0/20	AS17726	Ministry of Posts and Telecommunication Cambodia(MPTC)	4,096
203.223.48.0/20	AS17955	DENSAN CO., LTD.	4,096
203.223.160.0/20	AS23966	LINKdotNET Telecom Limited	4,096
203.223.56.0/22	AS17955	Densan Co., Ltd.	1,024
203.223.180.0/22	AS17698	COMMUNITY NETWORK CENTER INC.	1,024
203.223.36.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.37.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.38.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.39.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.40.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.41.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.17.0/24	AS136167	CHINA TELECOM(MACAU) COMPANY LIMITED	256
203.223.43.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.44.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.45.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.46.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.47.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.96.0/24	AS18313	HVBuk-incheon	256
203.223.176.0/24	AS45636	Videocon d2h Limited	256
203.223.178.0/24	AS45640	Suite 1301, Chater House	256
203.223.177.0/24	AS4766	Ulsan education Science research institute	256
203.223.42.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.18.0/24	AS136167	CHINA TELECOM(MACAU) COMPANY LIMITED	256
203.223.19.0/24	AS136167	CHINA TELECOM(MACAU) COMPANY LIMITED	256
203.223.20.0/24	AS136167	CHINA TELECOM(MACAU) COMPANY LIMITED	256
203.223.179.0/24	AS151833	Level 5, 355 Spencer Street	256
203.223.32.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.33.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.34.0/24	AS17726	Telecom Cambodia (T.C.)	256
203.223.35.0/24	AS17726	Telecom Cambodia (T.C.)	256

Hosted domains

There are 6 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.223.26.40	uqwimax.jp	1
203.223.26.41	port-concier.com	1
203.223.26.121	naito-sec.co.jp	1
203.223.30.190	nichiban.co.jp	1
203.223.26.59	ksig.jp	1
203.223.26.107	naito-sec.net	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
203.223.27.221	AS9999 AT TOKYO Corporation	`0.94ms` from Tokyo, JP
203.223.31.39	AS9999 AT TOKYO Corporation	`1.04ms` from Tokyo, JP
203.223.26.134	AS9999 AT TOKYO Corporation	`1.04ms` from Tokyo, JP
203.223.30.32	AS9999 AT TOKYO Corporation	`1.26ms` from Tokyo, JP
203.223.29.138	AS9999 AT TOKYO Corporation	`0.91ms` from Tokyo, JP
203.223.25.130	AS9999 AT TOKYO Corporation	`1.22ms` from Tokyo, JP
203.223.28.97	AS9999 AT TOKYO Corporation	`1.05ms` from Tokyo, 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
190.60.204.117	AS18747 IFX Corporation	`0.70ms` from Bogota, CO
178.168.4.21	AS31252 StarNet Solutii SRL	`0.20ms` from Chisinau, MD
68.227.149.37	AS22773 Cox Communications Inc.	`16.40ms` from Dallas, US
4.36.106.245	AS3356 Level 3 Parent, LLC	`0.34ms` from Denver, US
4.18.27.117	AS3356 Level 3 Parent, LLC	`0.85ms` from Durham, US
146.198.179.53	AS6871 Plusnet	`5.47ms` from Erith, GB
202.58.104.197	AS393889 EightJoy Network LLC	`1.04ms` from Hong Kong, HK
61.42.128.85	AS3786 LG DACOM Corporation	`1.72ms` from Incheon, KR
75.98.124.69	AS11708 City of North Kansas City, MO	`0.28ms` from Kansas City, US
148.216.46.21	AS11172 Alestra, S. de R.L. de C.V.	`6.79ms` from Mexico City, MX
168.90.58.165	AS265278 ZAAPNET TELECOMUNICACOES LTDA	`8.87ms` from Osasco, BR
195.225.11.5	AS25148 Orange Business Digital Norway AS	`1.15ms` from Oslo, NO
15.204.109.53	AS16276 OVH SAS	`0.36ms` from Portland, US
201.72.103.165	AS4230 CLARO S.A.	`0.30ms` from Porto Alegre, BR
186.193.253.149	AS28260 ALTA REDE CORPORATE NETWORK TELECOM LTDA - EPP	`1.05ms` from Rio de Janeiro, BR
50.199.12.5	AS7922 Comcast Cable Communications, LLC	`7.57ms` from Seattle, US
36.228.209.53	AS3462 Data Communication Business Group	`1.93ms` from Taipei, TW
125.206.12.53	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.18ms` from Tokyo, JP
91.119.195.181	AS8412 T-Mobile Austria GmbH	`8.25ms` from Vienna, AT
221.183.147.85	AS9808 China Mobile Communications Group Co., Ltd.	`0.33ms` from Xi'an, CN
209.96.218.133	AS7029 Windstream Communications LLC	`0.54ms` from Atlanta, US
85.239.113.149	AS16097 HL komm Telekommunikations GmbH	`0.73ms` from Berlin, DE
181.32.204.69	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`3.49ms` from Bogota, CO
24.180.218.69	AS20115 Charter Communications LLC	`13.51ms` from Chicago, US
63.158.219.181	AS209 CenturyLink Communications, LLC	`1.98ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -f5 -m13 203.223.24.119

traceroute to 203.223.24.119 (203.223.24.119): 13 hops max, 52 byte packets

5 [] 210.173.174.170 51.646 ms

6 [AS2497] 58.138.101.101 47.815 ms

7 [AS2497] 58.138.98.214 56.58 ms

8 [AS2497] 210.130.153.162 54.015 ms

9 [AS9999] 219.99.128.190 53.507 ms

10 [AS9999] 219.99.137.154 53.972 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On February 7th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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