AS38635

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Summary

IP address summary information
Name	Keio University
Country	Japan
Website	host.io/keio.ac.jp·keio.ac.jp
Hosted domains	32
IPv4 addresses	131,072
IPv6 addresses	2.42 × 10²⁴
ASN type	Education
Registry	JPNIC
Updated	14 years ago on Mar 11, 2012

Ranking

#14,426

Overall rank

among 74,706 networks

Traffic

#8,678

Infrastructure

#12,998

#248inJapan

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

Japan
100%

Held location over 90 days: 95%
Held location over 1 year: 97%
Median days between moves: 503 days
Geolocation scope: City

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
131.113.0.0/16	Keio University	65,536
133.27.0.0/16	Keio University	65,536

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 32 domain names hosted across 22 IP addresses on this ASN.

IP Address	Domain	Count
131.113.131.107		5
131.113.132.12		4
131.113.138.73		2
131.113.138.74		2
131.113.122.87		2

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs4
University3
Retail1

Category	In AS38635	Example IP
University	3	131.113.17.81
Retail	1	131.113.24.78

New

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Places

Peers

There are 2 peers for this ASN.

ASN	Name	Rank
AS2500	WIDE Project
AS2907	Research Organization of Information and Systems, National Institute of Informatics

Upstreams

There are 2 upstreams for this ASN.

ASN	Name	Rank
AS2500	WIDE Project
AS2907	Research Organization of Information and Systems, National Institute of Informatics

Downstreams

There are 0 downstreams for this ASN.

No downstreams found.

Pingable IPs

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

IP Address	ASN	Details
131.113.204.4 Ping	AS38635Keio University	2.09ms from Tokyo, JP
131.113.205.4 Ping	AS38635Keio University	2.08ms from Tokyo, JP
133.27.20.69 Ping	AS38635Keio University	2.79ms from Tokyo, JP
133.27.91.3 Ping	AS38635Keio University	2.83ms from Tokyo, JP
131.113.37.174 Ping	AS38635Keio University	3.32ms from Tokyo, JP
133.27.135.197 Ping	AS38635Keio University	12.61ms from Tokyo, JP
131.113.139.212 Ping	AS38635Keio University	2.16ms from Tokyo, JP
133.27.128.9 Ping	AS38635Keio University	2.91ms from Tokyo, JP
131.113.216.195 Ping	AS38635Keio University	2.09ms from Tokyo, JP
133.27.79.2 Ping	AS38635Keio University	2.74ms from Tokyo, JP

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS38635


133.27.3.1	Fujisawa, Japan
131.113.255.62	Yokohama, Japan
133.27.1.249	Fujisawa, Japan
131.113.255.78	Yokohama, Japan
131.113.255.14	Yokohama, Japan
131.113.255.46	Tokyo, Japan
131.113.1.150	Yokohama, Japan
131.113.255.30	Yokohama, Japan
131.113.1.137	Yokohama, Japan
131.113.1.169	Yokohama, Japan

Important routers in AS38635

Traceroute

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

$ traceroute -a -n -q1 -f10 -m29 133.27.116.88

traceroute to 133.27.116.88 (133.27.116.88): 29 hops max, 52 byte packets

10 [AS174] 154.54.61.129 22.72 ms

11 [AS174] 154.54.47.137 105.632 ms

12 [AS174] 154.54.169.178 115.901 ms

13 [AS174] 154.54.29.134 137.082 ms

14 [AS174] 154.54.40.249 141.938 ms

15 [AS174] 154.54.165.26 148.191 ms

16 [AS174] 154.54.166.58 164.724 ms

17 [AS174] 154.54.44.86 171.328 ms

18 [AS174] 154.54.27.118 173.73 ms

19 [AS174] 38.104.84.75 162.496 ms

20 [AS2497] 58.138.88.117 276.027 ms

21 [AS2497] 58.138.106.254 267.939 ms

22 [AS2497] 210.138.93.110 275.004 ms

23 [AS2907] 150.99.11.34 273.735 ms

24 [AS2907] 150.99.192.206 275.563 ms

25 [AS38635] 131.113.1.150 280.216 ms

26 [AS38635] 131.113.1.174 276.343 ms

27 *

28 *

29 *

Measurement taken from

IPinfo ProbeNet in Casablanca, MA

On September 17, 2026

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS38635 at robtex.

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AS38635

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS38635

Important routers in AS38635

Traceroute

Related Networks

AS131893

AS131928

AS131966

AS134396

AS23630

What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

IP Ranges

Important routers in AS38635

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

Places

AS131893

AS131928

AS131966

AS134396

AS23630

AS23784