133.187.0.0/16

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
133.137.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.114.0.0/16	AS2527	Sony Network Communications Inc.	65,536
133.163.0.0/16	AS2510	FUJITSU LIMITED	65,536
133.125.0.0/16	AS7684	SAKURA Internet Inc.	65,536
133.218.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.142.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.123.0.0/16	AS7522	STNet, Incorporated	65,536
133.167.0.0/16	AS9371	SAKURA Internet Inc.	65,536
133.236.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.110.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.175.0.0/16	AS2519	ARTERIA Networks Corporation	65,536
133.18.0.0/16	AS24282	KAGOYA JAPAN Inc.	65,536
133.159.0.0/16	AS2497	Internet Initiative Japan Inc.	65,536
133.112.0.0/16	AS2522	Japan Network Information Center	65,536
133.242.0.0/16	AS7684	SAKURA Internet Inc.	65,536
133.237.0.0/16	AS23820	Rakuten Group, Inc.	65,536
133.155.0.0/17	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	32,768
133.155.128.0/17	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	32,768
133.186.128.0/17	AS45974	NHN Cloud Japan Corporation	32,768
133.130.128.0/17	AS2514	NTT PC Communications,Inc.	32,768
133.232.128.0/17	AS2514	NTT PC Communications,Inc.	32,768
133.32.0.0/18	AS2519	ARTERIA Networks Corporation	16,384
133.149.192.0/18	AS2519	ARTERIA Networks Corporation	16,384
133.247.0.0/18	AS131918	SHONAN CABLE NETWORK	16,384
133.149.128.0/18	AS4677	Marubeni OKI Network Solutions Inc.	16,384
133.186.64.0/18	AS131915	Hamamatsu Cable Television .Inc	16,384
133.165.192.0/18	AS17534	NSK Co.,Ltd.	16,384
133.238.64.0/18	AS131958	TAMA CABLE NETWORK CO., LTD.	16,384
133.165.128.0/18	AS2527	Sony Network Communications Inc.	16,384
133.226.64.0/19	AS7524	ITEC Hankyu Hanshin Co.,Ltd.	8,192
133.238.32.0/19	AS2497	IIJ Internet	8,192
133.232.64.0/19	AS2514	INTERLINK Co.,LTD	8,192
133.32.224.0/19	AS2519	ARTERIA Networks Corporation	8,192
133.232.0.0/19	AS7682	DMG MORI Digital Co., LTD.	8,192
133.226.96.0/19	AS9997	CTY Co.,Ltd.	8,192
133.226.144.0/20	AS24279	SENDAI CATV CO.,LTD.	4,096
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
133.238.16.0/20	AS2497	IIJ Internet	4,096
133.32.128.0/20	AS2519	ARTERIA Networks Corporation	4,096
133.226.0.0/20	AS131934	ICC Corporation	4,096
133.32.176.0/20	AS2519	ARTERIA Networks Corporation	4,096
133.232.112.0/20	AS2514	INTERLINK Co.,LTD	4,096
133.88.48.0/20	AS23778	IMIZU CABLE NETWORK CO.,LTD.	4,096
133.226.160.0/20	AS17958	Kasaoka Cable Vision LIMITED	4,096
133.88.32.0/20	AS18281	Chitahanto Cable Network Corp.	4,096
133.226.16.0/20	AS23624	Chukai Television Co,.Ltd.	4,096
133.32.208.0/20	AS2519	ARTERIA Networks Corporation	4,096
133.247.240.0/20	AS131923	MCAT 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

Read more

Pingable IPs

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

IP Address	ASN	Details
133.187.1.254	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`8.65ms` from Tokyo, JP
133.187.4.14	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`9.31ms` from Tokyo, JP
133.187.3.3	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`9.63ms` 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
73.216.243.224	AS7922 Comcast Cable Communications, LLC	`8.52ms` from Ashburn, US
136.57.70.128	AS16591 Google Fiber Inc.	`5.56ms` from Atlanta, US
222.154.119.16	AS4771 Spark New Zealand Trading Ltd.	`14.09ms` from Auckland, NZ
116.204.111.160	AS55990 Huawei Cloud Service data center	`8.06ms` from Beijing, CN
186.99.213.208	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`13.44ms` from Bogota, CO
113.52.6.160	AS45481 Digital Sense Data Centre Hosting Brisbane	`0.73ms` from Brisbane, AU
52.162.167.160	AS8075 Microsoft Corporation	`0.48ms` from Chicago, US
90.236.74.96	AS3301 Telia Company AB	`8.80ms` from Copenhagen, DK
70.237.30.144	AS7018 AT&T Enterprises, LLC	`2.44ms` from Dallas, US
165.207.32.192	AS210137 Lear Corporation	`1.42ms` from Frankfurt am Main, DE
79.249.25.48	AS3320 Deutsche Telekom AG	`6.51ms` from Frankfurt am Main, DE
144.34.147.16	AS25820 IT7 Networks Inc	`0.36ms` from Los Angeles, US
107.155.253.16	AS46261 QuickPacket, LLC	`0.66ms` from Los Angeles, US
201.170.52.128	AS8151 UNINET	`3.78ms` from Los Angeles, US
73.204.190.224	AS7922 Comcast Cable Communications, LLC	`8.83ms` from Miami, US
31.173.13.224	AS25159 PJSC MegaFon	`13.58ms` from Moscow, RU
87.146.191.32	AS3320 Deutsche Telekom AG	`6.36ms` from Nuernberg, DE
44.219.98.0	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
46.109.37.144	AS12578 SIA Tet	`1.09ms` from Riga, LV
134.70.2.0	AS46558 Oracle Corporation	`0.55ms` from Seattle, US
211.74.206.0	AS4780 Digital United Inc.	`5.47ms` from Taipei, TW
81.70.245.240	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.96ms` from Beijing, CN
206.197.226.32	AS55154 Madgenius.com	`0.31ms` from Chicago, US
74.131.139.192	AS10796 Charter Communications Inc	`7.98ms` from Columbus, US
177.147.210.192	AS10429 TELEFÔNICA BRASIL S.A	`10.00ms` from Curitiba, BR

Traceroute

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

traceroute -a -n -q1 -f8 -m15 133.187.86.188

traceroute to 133.187.86.188 (133.187.86.188): 15 hops max, 52 byte packets

8 [AS45758] 110.164.0.7 93.87 ms

9 *

10 *

11 [AS2907] 150.99.9.232 104.751 ms

12 [AS2907] 150.99.189.74 117.954 ms

13 *

14 *

15 *

Measurement taken from

IPinfo ProbeNet in Bangkok, TH

On November 14th 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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