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	Prefix	Description
	103.152.138.0/23	DENSAN CO., LTD.
	120.88.16.0/20	DENSAN CO., LTD.
	120.88.16.0/21	Densan Co., Ltd.
	120.88.24.0/21	Densan Co., Ltd.
	192.47.64.0/21	Asia Pacific Network Information Centre
	202.247.192.0/18	DENSAN CO., LTD.
	203.223.48.0/20	DENSAN CO., LTD.
	203.223.48.0/21	Densan Co., Ltd.
	203.223.56.0/22	Densan Co., Ltd.
	203.223.60.0/22	Densan Co., Ltd.
	210.56.160.0/19	DENSAN CO., LTD.
	2406:8000::/32	Japan Network Information Center

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS2497	Internet Initiative Japan Inc.	✔	✔
	AS17676	SoftBank Corp.	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS2497	Internet Initiative Japan Inc.	✔	✔
	AS6939	Hurricane Electric LLC	✔	✔
	AS17676	SoftBank Corp.	✔	✔
	AS150369	TelHi Corporation	✔	✔
	AS20473	The Constant Company, LLC	✔	✔
	AS9002	RETN Limited	✔	✔
	AS8966	Etisalat (ETC)	✔	✔
	AS59105	Home NOC Operators Group	✔	✔
	AS24482	SG.GS	✔	✔
	AS1828	Unitas Global	✔	✔
	AS2635	Automattic, Inc	✔	✔
	AS9507	NextHop Pty Ltd	✔	✘
	AS138997	Eons Data Communications Limited	✔	✔
	AS4651	The Communications Authority of Thailand (CAT)	✔	✔
	AS63774	Kamoike.net LLP	✔	✘
	AS216211	CYBERVERSE LLC	✔	✔
	AS49544	i3D.net B.V	✔	✔
	AS9304	HGC Global Communications Limited	✔	✘
	AS2515	Japan Network Information Center	✔	✔
	AS2907	Science Information Network	✔	✔
	AS9886	CTCSCI TECH LIMITED	✔	✘
	AS8849	Melbikomas UAB	✔	✔
	AS20485	TransTeleCom JSC	✔	✘
	AS32590	Valve Corporation	✔	✔
	AS15169	Google LLC	✔	✔
	AS153371	BACK WAVES LIMITED	✔	✔
	AS60068	Datacamp Limited (CDN77 / DataPacket)	✔	✘
	AS18526	DDPS Networks, LLC	✔	✔
	AS9299	PLDT (Philippine Long Distance Telephone Company)	✔	✘
	AS55685	PT Jala Lintas Media	✔	✘
	AS23815	Japan Internet Xing Co., Ltd.	✔	✘
	AS150363	SoftEther Corporation	✘	✔
	AS134835	Starry Network Limited	✘	✔
	AS55900	GLBB Japan KK	✘	✔
	AS20326	TeraSwitch Networks Inc.	✘	✔
	AS23640	BBIX,Inc.	✔	✘

[ 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]                  17955
b. [AS Name]                    AVISNET
g. [Organization]               Densan Co., Ltd.
m. [Administrative Contact]     JP00006149
n. [Technical Contact]          JP00006149
q. [Abuse]                      
o. [IMPORT]                     
p. [EXPORT]                     
[Assigned Date]                 2002/01/04
[Last Update]                   2008/08/04 17:22:37(JST)

Last Update: 2025-12-14T22:48:44Z UTC / (Click here to force a refresh)

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Member of the following AS-SETs

-	Member	ASN Count
JPIRR	as-bbix-t	877
RADB	as-anc	11856
ARIN	as1239:as-customers	4238
JPIRR	as-iij	4729
RADB	as-avisnet	10
LEVEL3	as-level3-origins-na	0
RADB	as-iij	4729
RADB	as-bbix-t-v6	683
RADB	as-gigainfra-v6	833
JPIRR	as-gigainfra	1265
JPIRR	as-gigainfra-v6	833
RADB	as-bbix-t	877
JPIRR	as-bbix-t-v6	683
JPIRR	as-avisnet	10
RADB	as-wide-v6	30
RADB	as-pacnet	11816
RADB	as-gigainfra	1265
RADB	as-iij6	4101
JPIRR	as-iij6	4101
LEVEL3	as-sprint-origins	7309