View

If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	133.31.0.0/17	Tokyo University of Science
	133.31.0.0/16	Tokyo University of Science
	133.31.128.0/17	Tokyo University of Science
	2001:df0:cf::/48	Tokyo University of Science

---

Network Policy

Click here to learn more about what this graph means and what makes up a network policy Global Aggregation Policy relaxed_grothendieck Policy gallant_shirley Policy angry_mcnulty

Chart Display Options

Display links using non straight lines

Prefixes in selected policy

Load all prefixes in policy

---

How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS2907	Science Information Network	✔	✔
	AS9993	ITOCHU Techno-Solutions Corporation	✔	✔

---

Peers

	ASN	Description	IPv4	IPv6
	AS2907	Science Information Network	✔	✔
	AS9993	ITOCHU Techno-Solutions Corporation	✔	✔

[ JPNIC database provides information regarding IP address and ASN. Its use   ]
[ is restricted to network administration purposes. For further information,  ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output,        ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

Autonomous System Information:
a. [AS Number]                  55390
b. [AS Name]                    TUSNET
g. [Organization]               Tokyo University of Science
m. [Administrative Contact]     JP00062012
n. [Technical Contact]          JP00062012
q. [Abuse]                      
o. [IMPORT]                     
p. [EXPORT]                     
[Assigned Date]                 2010/10/29
[Last Update]                   2022/05/11 09:08:03(JST)

Last Update: 2025-07-09T23:42:27Z UTC / (Click here to force a refresh)

---

Member of the following AS-SETs

-	Member	ASN Count
NTTCOM	as-ocn	2
RADB	as-iij6	4107
JPIRR	as-ocn-v6	204
ARIN	as1239:as-customers	4238
RADB	as-ocn-v6	204
JPIRR	as2907:as-sinet	150
RADB	as-ocn	2
JPIRR	as24257:as-jpix	11
RIPE	as20965:as-from-tein-to-geant	654
JPIRR	as-iij	4735
JPIRR	as-ocn	2
NTTCOM	as-ocn-v6	204
RADB	as-iij	4735
JPIRR	as-iij6	4107