192.51.208.0/20

AS2501 · The University of Tokyo

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Summary

Country	Japan
Domain	u-tokyo.ac.jp
ASN	AS2501
Registry	APNIC
ID	UTNET

Pingable IPs

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

IP Address	ASN	Details
192.51.222.50	AS2501 The University of Tokyo	2.18ms from Tokyo, JP
192.51.223.35	AS2501 The University of Tokyo	1.38ms 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
185.210.131.20	AS34373 XXLnet B.V.	0.36ms from Amsterdam, NL
178.147.245.116	AS6799 Ote SA (Hellenic Telecommunications Organisation)	14.86ms from Athens, GR
34.38.20.244	AS396982 Google LLC	0.16ms from Brussels, BE
99.86.2.84	AS16509 Amazon.com, Inc.	0.24ms from Frankfurt am Main, DE
86.244.155.36	AS3215 Orange S.A.	6.89ms from Paris, FR
104.187.60.20	AS7018 AT&T Enterprises, LLC	14.30ms from Atlanta, US
203.209.75.4	AS7693 KSC Commercial Internet Co. Ltd.	4.56ms from Bangkok, TH
79.205.219.68	AS3320 Deutsche Telekom AG	8.64ms from Frankfurt am Main, DE
27.237.211.196	AS4766 Korea Telecom	8.33ms from Seoul, KR
46.55.135.100	AS51582 Cifrova Kabelna Korporacia EOOD	3.23ms from Sofia, BG
39.63.198.196	AS17557 Pakistan Telecommunication Company Limited	6.08ms from Lahore, PK
80.180.28.148	AS3269 Telecom Italia S.p.A.	3.18ms from Milan, IT
88.186.103.4	AS12322 Free SAS	3.19ms from Paris, FR
70.181.15.100	AS22773 Cox Communications Inc.	6.92ms from Boston, US
189.115.80.132	AS18881 TELEFÔNICA BRASIL S.A	10.36ms from Sao Paulo, BR
171.6.210.164	AS45758 Triple T Broadband Public Company Limited	2.43ms from Bangkok, TH
79.249.127.36	AS3320 Deutsche Telekom AG	1.63ms from Duesseldorf, DE
123.21.184.148	AS45899 VNPT Corp	1.55ms from Ho Chi Minh City, VN
177.161.244.84	AS26599 TELEFÔNICA BRASIL S.A	1.83ms from Sao Paulo, BR
131.147.46.212	AS2527 Sony Network Communications Inc.	2.06ms from Tokyo, JP
67.177.147.100	AS7922 Comcast Cable Communications, LLC	7.71ms from Flint, US
3.72.120.116	AS16509 Amazon.com, Inc.	0.17ms from Frankfurt am Main, DE
191.53.193.4	AS28202 MASTER S/A	9.72ms from Osasco, BR
104.154.187.196	AS396982 Google LLC	0.13ms from Council Bluffs, US
92.215.105.84	AS3209 Vodafone GmbH	6.88ms from Hamburg, DE

WHOIS Details

inetnum:        192.51.208.0 - 192.51.223.255
netname:        UTNET
descr:          University of Tokyo
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        Authoritative information regarding assignments and
remarks:        allocations made from within this block can also be
remarks:        queried at whois.nic.ad.jp. To obtain an English
remarks:        output query whois -h whois.nic.ad.jp x.x.x.x/e
country:        JP
mnt-by:         MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
status:         ALLOCATED PORTABLE
last-modified:  2016-05-11T01:21:59Z
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:         [email protected]
abuse-mailbox:  [email protected]
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
auth:           # Filtered
remarks:        [email protected] 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:         [email protected]
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:        192.51.208.0 - 192.51.223.255
netname:        UTSNET-CIDR-BLK-JP
descr:          University of Tokyo
country:        JP
admin-c:        MN010JP
tech-c:         MN010JP
tech-c:         YS7474JP
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:  2011-10-20T03:32:02Z
source:         JPNIC

Nearby Ranges

BGP prefixes that overlap with 192.51.0.0/16

Range	ASN	Company	Num of IPs
192.51.144.0/21	AS17511	KEIHANNA INTERACTION PLAZA INC.	2,048
192.51.168.0/22	AS2907	Inter-University Research Institute Corporation, National Institutes for the Humanities, National Museum of Ethnology	1,024
192.51.194.0/23	AS2907	Hokusei Gakuen University	512
192.51.192.0/23	AS11094	University Hospital	512
192.51.5.0/24	AS2116	Spacetec AS, Tromso	256
192.51.240.0/24	AS36974	MTN COTE D'IVOIRE S.A	256
192.51.39.0/24	AS17944	Japan Weather Association	256
192.51.48.0/24	AS15356	The Bancorp Incorporated	256
192.51.43.0/24	AS2510	FUJITSU LIMITED	256
192.51.55.0/24	AS10021	TOYOBO CO., LTD	256
192.51.188.0/24	AS136038	Zhengzhou, a Dream Computer Technology Limited	256
192.51.54.0/24	AS17676	NTT DATA Mathematical Systems Inc.	256
192.51.224.0/24	AS4680	Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. Systems Division	256

Hosted domains

There are no domains currently hosted on this ASN.

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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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