133.21.0.0/16

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

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Summary

Country	Japan
Domain	nic.ad.jp
ASN	AS2907
Registry	APNIC
ID	JPNIC-NET-JP-ERX

WHOIS Details

inetnum:        133.0.0.0 - 133.255.255.255
netname:        JPNIC-NET-JP-ERX
descr:          Japan Network Information Center
country:        JP
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
abuse-c:        AJ382-AP
remarks:        133/8 block is an ERX range which transfered from
remarks:        ARIN to APNIC on 2009-10-30
remarks:        The original allocation date was 1997-03-01
remarks:        Please search  whois.nic.ad.jp for more information
remarks:        about this range
remarks:        % whois -h whois.nic.ad.jp ***.***.***.***/e
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
last-modified:  2022-11-01T04:33:10Z
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 2024-11-27
mnt-by:         MAINT-JPNIC
last-modified:  2025-09-04T01:00:00Z
source:         APNIC

role:           ABUSE JPNICJP
country:        ZZ
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, japan
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         hostmaster@nic.ad.jp
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
nic-hdl:        AJ382-AP
remarks:        Generated from irt object IRT-JPNIC-JP
remarks:        hostmaster@nic.ad.jp was validated on 2024-11-27
abuse-mailbox:  hostmaster@nic.ad.jp
mnt-by:         APNIC-ABUSE
last-modified:  2025-01-23T00:15:35Z
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

Nearby Ranges

BGP prefixes that overlap with 133.0.0.0/8

Range	ASN	Company	Num of IPs
133.237.0.0/16	AS23820	Rakuten Group, Inc.	65,536
133.125.0.0/16	AS7684	SAKURA Internet Inc.	65,536
133.123.0.0/16	AS7522	STNet, Incorporated	65,536
133.114.0.0/16	AS2527	Sony Network Communications Inc.	65,536
133.236.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.142.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.175.0.0/16	AS2519	ARTERIA Networks Corporation	65,536
133.242.0.0/16	AS7684	SAKURA Internet Inc.	65,536
133.163.0.0/16	AS2510	FUJITSU LIMITED	65,536
133.167.0.0/16	AS9371	SAKURA Internet Inc.	65,536
133.112.0.0/16	AS2522	Japan Network Information Center	65,536
133.218.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.159.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.137.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.110.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.18.0.0/16	AS24282	KAGOYA JAPAN Inc.	65,536
133.155.128.0/17	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	32,768
133.130.128.0/17	AS2514	NTT PC Communications,Inc.	32,768
133.155.0.0/17	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	32,768
133.186.128.0/17	AS45974	NHN Cloud Japan Corporation	32,768
133.232.128.0/17	AS2514	NTT PC Communications,Inc.	32,768
133.165.192.0/18	AS17534	NSK Co.,Ltd.	16,384
133.32.0.0/18	AS2519	ARTERIA Networks Corporation	16,384
133.247.0.0/18	AS131918	SHONAN CABLE NETWORK	16,384
133.165.128.0/18	AS2527	Sony Network Communications Inc.	16,384
133.149.192.0/18	AS2519	ARTERIA Networks Corporation	16,384
133.186.64.0/18	AS131915	Hamamatsu Cable Television .Inc	16,384
133.238.64.0/18	AS131958	TAMA CABLE NETWORK CO., LTD.	16,384
133.149.128.0/18	AS4677	Marubeni OKI Network Solutions Inc.	16,384
133.232.64.0/19	AS2514	INTERLINK Co.,LTD	8,192
133.226.96.0/19	AS9997	CTY Co.,Ltd.	8,192
133.32.224.0/19	AS2519	ARTERIA Networks Corporation	8,192
133.238.32.0/19	AS2497	IIJ Internet	8,192
133.226.64.0/19	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	8,192
133.232.0.0/19	AS7682	DMG MORI Digital Co., LTD.	8,192
133.186.0.0/20	AS10010	TOKAI Communications Corporation	4,096
133.32.80.0/20	AS131918	SHONAN CABLE NETWORK	4,096
133.247.144.0/20	AS131949	General Incorporated Foundation Aso Telework Center	4,096
133.232.96.0/20	AS2514	INTERLINK Co.,LTD	4,096
133.226.0.0/20	AS131934	ICC Corporation	4,096
133.238.16.0/20	AS2497	IIJ Internet	4,096
133.32.128.0/20	AS2519	ARTERIA Networks Corporation	4,096
133.226.144.0/20	AS24279	SENDAI CATV CO.,LTD.	4,096
133.117.64.0/20	AS58791	GMO Internet Group, Inc.	4,096
133.226.16.0/20	AS23624	Chukai Television Co,.Ltd.	4,096
133.226.160.0/20	AS17958	Kasaoka Cable Vision LIMITED	4,096
133.117.80.0/20	AS18094	Tokyo Cable Network.,Inc.	4,096
133.88.48.0/20	AS23778	IMIZU CABLE NETWORK CO.,LTD.	4,096
133.88.32.0/20	AS18281	Chitahanto Cable Network Corp.	4,096
133.232.112.0/20	AS2514	INTERLINK Co.,LTD	4,096

Hosted domains

There are no domains currently hosted on this ASN.

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

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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
133.21.191.4	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`3.65ms` from Osaka, JP
133.21.190.1	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`3.21ms` 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
196.190.116.128	AS24757 Ethio Telecom	`10.29ms` from Addis Ababa, ET
176.108.70.176	AS57826 Svyaz-INKOM-Servis i telekommunikatsii Ltd.	`6.93ms` from Astana, KZ
134.102.251.128	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`12.68ms` from Berlin, DE
34.123.116.32	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
103.148.130.144	AS141127 PT Anugerah Cimanuk Raya	`5.27ms` from Jakarta, ID
194.249.68.224	AS2107 ARNES	`0.34ms` from Ljubljana, SI
64.95.188.128	AS15570 PACKETFABRIC (UK) LTD	`0.58ms` from London, GB
34.0.197.224	AS15169 Google LLC	`0.12ms` from Madrid, ES
181.141.36.112	AS13489 UNE EPM TELECOMUNICACIONES S.A.	`11.87ms` from Medellin, CO
49.188.84.144	AS4804 Microplex PTY LTD	`6.05ms` from Melbourne, AU
15.160.7.208	AS16509 Amazon.com, Inc.	`0.13ms` from Milan, IT
36.151.79.64	AS56046 China Mobile communications corporation	`3.25ms` from Nanjing, CN
68.193.222.32	AS6128 Cablevision Systems Corp.	`13.11ms` from New York City, US
67.126.58.144	AS7018 AT&T Enterprises, LLC	`3.15ms` from San Jose, US
64.167.233.16	AS7018 AT&T Enterprises, LLC	`4.15ms` from San Jose, US
200.36.209.0	AS271867 MARIO BENAVIDES SERVICIO DE TELEVISION POR CABLE E.I.R.L (CABLEVISION DEL SUR)	`6.46ms` from Santiago, CL
179.135.222.144	AS26599 TELEFÔNICA BRASIL S.A	`7.67ms` from Sao Paulo, BR
218.52.215.0	AS9318 SK Broadband Co Ltd	`1.84ms` from Seoul, KR
193.44.77.16	AS5411 Tietoevry Oyj	`1.43ms` from Stockholm, SE
202.215.70.208	AS2519 ARTERIA Networks Corporation	`7.60ms` from Tokyo, JP
180.51.96.208	AS4713 NTT DOCOMO BUSINESS,Inc.	`10.42ms` from Tokyo, JP
153.199.118.80	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.66ms` from Tokyo, JP
44.211.79.176	AS14618 Amazon.com, Inc.	`0.72ms` from Ashburn, US
98.230.21.176	AS7922 Comcast Cable Communications, LLC	`11.01ms` from Atlanta, US
87.173.158.32	AS3320 Deutsche Telekom AG	`4.34ms` from Berlin, DE

Traceroute

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

traceroute -a -n -q1 -m9 133.21.234.2

traceroute to 133.21.234.2 (133.21.234.2): 9 hops max, 52 byte packets

1 [AS15169] 66.249.95.81 229.804 ms

2 [AS15169] 216.239.59.32 232.074 ms

3 *

4 [AS2907] 150.99.16.246 260.709 ms

5 [AS2907] 150.99.199.218 258.905 ms

6 [AS2907] 133.21.190.5 260.704 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Frankfurt am Main, DE

On December 28th 2025

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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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