192.31.121.0/24

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

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Summary

Country	Japan
Domain	u-tokyo.ac.jp
ASN	AS2907
Registry	JPNIC
ID	UTSNET-CIDR-BLK-JP

WHOIS Details

inetnum:        192.31.121.0 - 192.31.121.255
netname:        UTSNET-CIDR-BLK-JP
descr:          University of Tokyo
country:        JP
admin-c:        MN010JP
tech-c:         MN010JP
tech-c:         YS7474JP
last-modified:  2018-06-13T02:08:04Z
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)
source:         JPNIC

Nearby Ranges

BGP prefixes that overlap with 192.31.0.0/16

Range	ASN	Company	Num of IPs
192.31.56.0/22	AS54190	Leads Media, Inc	1,024
192.31.178.0/23	AS393506	MY.COM US, INC.	512
192.31.50.0/23	AS46789	Linea Mex, LLC.	512
192.31.126.0/23	AS23165	Brierley & Partners, Inc.	512
192.31.107.0/24	AS3464	Alabama Supercomputer Authority	256
192.31.108.0/24	AS7939	University of Central Florida	256
192.31.102.0/24	AS3320	Leuze electronic GmbH + Co. KG	256
192.31.114.0/24	AS254	Micro Focus	256
192.31.104.0/24	AS2738	Shields Health Care Group	256
192.31.12.0/24	AS749	Headquarters, USAISC	256
192.31.125.0/24	AS30704	WellSky Corporation	256
192.31.141.0/24	AS397325	Data Canopy Colocation, LLC	256
192.31.128.0/24	AS397325	Data Canopy Colocation, LLC	256
192.31.13.0/24	AS1516	Headquarters, USAISC	256
192.31.112.0/24	AS3592	Trinity College	256
192.31.130.0/24	AS400615	Data Canopy Colocation, LLC	256
192.31.133.0/24	AS397325	Data Canopy Colocation, LLC	256
192.31.134.0/24	AS62731	Private Customer	256
192.31.135.0/24	AS400615	Data Canopy Colocation, LLC	256
192.31.136.0/24	AS397325	I.M. Systems Group	256
192.31.137.0/24	AS397325	Data Canopy Colocation, LLC	256
192.31.138.0/24	AS400615	Data Canopy Colocation, LLC	256
192.31.139.0/24	AS397325	Data Canopy Colocation, LLC	256
192.31.140.0/24	AS46696	Data Canopy Colocation, LLC	256
192.31.14.0/24	AS40971	NVIDIA Advanced Rendering Center	256
192.31.147.0/24	AS668	Navy Network Information Center (NNIC)	256
192.31.142.0/24	AS46696	Sidus Group, LLC	256
192.31.143.0/24	AS400615	Data Canopy Colocation, LLC	256
192.31.144.0/24	AS10943	OLD REPUBLIC NATIONAL TITLE INSURANCE CO.	256
192.31.146.0/24	AS6106	University of California, Riverside	256
192.31.129.0/24	AS400615	Data Canopy Colocation, LLC	256
192.31.15.0/24	AS397098	Brash Concepts, Inc.	256
192.31.153.0/24	AS22213	Salk Institute	256
192.31.156.0/24	AS11351	Canisius College	256
192.31.157.0/24	AS393479	Army Aviation Center Federal Credit Union	256
192.31.158.0/24	AS27064	DoD Network Information Center	256
192.31.160.0/24	AS749	DoD Network Information Center	256
192.31.161.0/24	AS393282	University of California at Berkeley	256
192.31.163.0/24	AS40371	PROS, Inc.	256
192.31.165.0/24	AS7018	R P Funding, Inc.	256
192.31.172.0/24	AS749	DoD Network Information Center	256
192.31.174.0/24	AS749	Navy Network Information Center (NNIC)	256
192.31.177.0/24	AS40478	MCJ CONSEIL	256
192.31.110.0/24	AS21759	National Rural Utilities Cooperative Finance Corporation	256
192.31.180.0/24	AS394971	Okanagan College	256
192.31.182.0/24	AS400957	Melissa's Produce	256
192.31.183.0/24	AS395483	Advisors Asset Management, Inc.	256
192.31.190.0/24	AS22233	City National Bank of Florida	256
192.31.103.0/24	AS14428	Pomeroy Technologies LLC	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

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

IP Address	ASN	Details
192.31.121.1	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`1.67ms` 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
174.102.69.168	AS10796 Charter Communications Inc	`8.14ms` from Columbus, US
34.132.124.248	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
107.219.14.8	AS7018 AT&T Enterprises, LLC	`19.26ms` from Dallas, US
129.173.154.72	AS8111 Dalhousie University	`0.38ms` from Halifax, CA
86.183.134.120	AS2856 British Telecommunications PLC	`8.09ms` from London, GB
188.93.182.40	AS49318 TELEFONICA TECH UK MANAGED SERVICES LTD	`5.31ms` from London, GB
105.76.76.216	AS36884 Wana Corporate	`14.46ms` from Madrid, ES
192.162.22.152	AS51070 TOKS Ltd	`5.19ms` from Moscow, RU
83.204.233.168	AS3215 Orange S.A.	`2.07ms` from Paris, FR
18.233.32.120	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
35.170.17.56	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
187.123.147.136	AS28573 Claro NXT Telecomunicacoes Ltda	`6.71ms` from Sao Paulo, BR
98.146.166.168	AS10838 Charter Communications Inc	`9.91ms` from Seattle, US
203.92.210.168	AS2687 AT&T Enterprises, LLC	`1.44ms` from Singapore, SG
125.231.145.152	AS3462 Data Communication Business Group	`2.98ms` from Taipei, TW
181.125.195.72	AS23201 Telecel S.A.	`5.94ms` from Asuncion, PY
52.235.163.168	AS8075 Microsoft Corporation	`0.73ms` from Boydton, US
34.133.142.104	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
216.97.243.232	AS13693 Vexus Fiber	`8.28ms` from Dallas, US
52.29.126.56	AS16509 Amazon.com, Inc.	`0.22ms` from Frankfurt am Main, DE
36.140.129.248	AS9808 China Mobile Communications Group Co., Ltd.	`0.41ms` from Hangzhou, CN
14.237.214.248	AS45899 VNPT Corp	`4.86ms` from Ho Chi Minh City, VN
142.236.66.24	AS11079 Zayo Bandwidth	`12.92ms` from Montreal, CA
103.40.13.72	AS63567 Suqian Pugongying Network Service Co.,Ltd	`5.22ms` from Nanjing, CN
116.81.49.72	AS18144 Enecom,Inc.	`7.09ms` from Osaka, JP

Traceroute

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

traceroute -a -n -q1 -f2 192.31.121.93

traceroute to 192.31.121.93 (192.31.121.93): 64 hops max, 52 byte packets

2 [AS136557] 180.149.230.201 0.167 ms

3 [AS136557] 103.216.222.26 0.245 ms

4 [AS5580] 203.190.230.207 0.726 ms

5 [AS2907] 150.99.10.82 1.814 ms

6 [AS2907] 150.99.181.234 1.973 ms

7 [AS2907] 192.31.121.250 1.984 ms

8 [AS2907] 192.31.121.93 2.612 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On September 11th 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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