AS17955

Name: AS17955 — Densan Co., Ltd.
Creator: ipdex

Densan Co., Ltd. ISP registered in Japan

11IPv4 prefixes

1IPv6 prefixes

92%RPKI-valid

#19,222AS Rank

325/325RIS visibility

#214Rank in Japan

2001-09-21Allocated

Densan Co., Ltd. (AS17955) — ISP, registered in Japan. announces 11 IPv4 prefixes + 1 IPv6 prefixes. Rank in Japan: #214. Allocated: 2001-09-21.

IPv4 11IPv6 1

Announced prefixes · 12

v4 103.152.138.0/23 valid
v4 120.88.16.0/20 valid
v4 120.88.16.0/21 valid
v4 120.88.24.0/21 valid
v4 192.47.64.0/21 unknown
v4 202.247.192.0/18 valid
v4 203.223.48.0/20 valid
v4 203.223.48.0/21 valid
v4 203.223.56.0/22 valid
v4 203.223.60.0/22 valid
v4 210.56.160.0/19 valid
v6 2406:8000::/32 valid

RPKI: rpki.cloudflare.com · 2026-06-17

Routing: 11 IPv4 · 1 IPv6 announced · RIS visibility 325/325 RIS peers · RIPEstat · 2026-06-18

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	12
2026-06-13	12

Internet Exchanges · 2

BBIX Tokyo Tokyo 20 Gbps
JPNAP Tokyo Tokyo 20 Gbps

AS topology · Customer cone 1

Providers · 2

AS2497 Internet Initiative Japan Inc.
AS17676 SoftBank Corp.

Peers · 16

AS6939 Hurricane Electric LLC
AS9002 RETN Limited
AS20485 Joint Stock Company TransTeleCom
AS9304 HGC Global Communications Limited
AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
AS1828 Unitas Global

Embed this on your site

Free badges and live charts — they update as the index does. No key, link back to ipdex.

Badge

Markdown

[![AS17955 on ipdex](https://ipdex.io/badge/asn/17955.svg)](https://ipdex.io/asn/AS17955/)

HTML

<a href="https://ipdex.io/asn/AS17955/"><img src="https://ipdex.io/badge/asn/17955.svg" alt="AS17955 on ipdex"></a>

Live chart (iframe)

<iframe src="https://ipdex.io/embed/asn/17955" width="680" height="260" frameborder="0" scrolling="no" title="ipdex chart" style="border:0;max-width:100%"></iframe>

oEmbed-enabled: paste the page URL into platforms that support oEmbed and the chart embeds automatically.