Autonomous System details

AS31

California Institute of Technology  ·  caltech.edu

United States

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AS31 – California Institute of Technology

Field Value
Country United States
Website caltech.edu
Hosted domains 96
IPv4 addresses 131,840
IPv6 addresses 79,228,162,514,264,337,593,543,950,336
ASN type Education
Registry arin
Allocated 41 years ago on Sep 21, 1984
Updated 2 years ago on Aug 29, 2023

IP Ranges

Netblock Company Num of IPs
131.215.0.0/16 California Institute of Technology 65,536
134.4.0.0/16 California Institute of Technology 65,536
131.215.242.0/23 California Institute of Technology 512
131.215.244.0/23 California Institute of Technology 512
131.215.229.0/24 California Institute of Technology 256
131.215.230.0/24 California Institute of Technology 256
131.215.234.0/24 California Institute of Technology 256
131.215.239.0/24 California Institute of Technology 256
131.215.240.0/24 California Institute of Technology 256
192.12.19.0/24 California Institute of Technology 256
192.31.43.0/24 California Institute of Technology 256
192.41.208.0/24 California Institute of Technology 256

Netblock Company
2607:f520::/32 California Institute of Technology
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WHOIS Details

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                                                ASHandle:       AS31
                                                OrgID:          AS31
                                                ASName:         AS31
                                                ASNumber:       AS31
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 96 domain names hosted across 55 IP addresses on this ASN.

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IP Address Domain Domains on this IP
131.215.242.9 ██████████ 9
134.4.74.17 ██████████ 6
131.215.140.111 ██████████ 6
131.215.198.54 ██████████ 5
131.215.239.20 ██████████ 4
131.215.113.72 ██████████ 3
131.215.176.71 █████████ 3
131.215.5.239 █████████ 3
131.215.76.24 ██████████ 3
131.215.66.188 ██████████ 3

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Peers

There are 3 peers for this ASN.

Peers Name
AS13335 Cloudflare, Inc.
AS2152 CENIC
AS2153 CENIC
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ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS13335 Cloudflare, Inc.
AS2152 CENIC
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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address ASN Details
131.215.134.7 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.200.181 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.50.223 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.66.32 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.232.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.41.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.199.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.189.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.130.254 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.166.254 AS31 California Institute of Technology 0.86ms from Los Angeles, US
131.215.109.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.110.203 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.207.6 AS31 California Institute of Technology 0.84ms from Los Angeles, US
131.215.27.21 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.140.107 AS31 California Institute of Technology 0.86ms from Los Angeles, US
134.4.25.119 AS31 California Institute of Technology 1.17ms from Los Angeles, US
131.215.167.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.23.124 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.230.21 AS31 California Institute of Technology 1.42ms from Los Angeles, US
131.215.210.224 AS31 California Institute of Technology 0.99ms from Los Angeles, US
134.4.33.93 AS31 California Institute of Technology 1.16ms from Los Angeles, US
131.215.78.130 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.62.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.4.183 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.152.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US

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
23.94.14.95 AS36352 HostPapa 0.53ms from Atlanta, US
44.225.222.95 AS16509 Amazon.com, Inc. 0.19ms from Boardman, US
172.183.100.191 AS8075 Microsoft Corporation 0.28ms from Chicago, US
47.222.46.111 AS19108 Optimum 1.25ms from Dallas, US
171.76.59.255 AS24560 Bharti Airtel Ltd., Telemedia Services 8.46ms from Delhi, IN
106.202.143.255 AS24560 Bharti Airtel Ltd., Telemedia Services 9.56ms from Delhi, IN
102.115.106.223 AS23889 Mauritius Telecom Ltd 4.32ms from Ebene, MU
87.177.243.159 AS3320 Deutsche Telekom AG 3.02ms from Frankfurt am Main, DE
106.52.28.95 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.01ms from Guangzhou, CN
197.211.196.207 AS37332 Zimbabwe Online 1.62ms from Harare, ZW
103.11.22.255 AS58390 PT. Faasri Utama Sakti 2.13ms from Jakarta, ID
104.243.16.223 AS25820 IT7 Networks Inc 0.25ms from Los Angeles, US
2.102.198.239 AS13285 TalkTalk Communications Limited 2.39ms from Manchester, GB
87.22.157.255 AS3269 Telecom Italia S.p.A. 4.71ms from Milan, IT
75.245.48.223 AS6167 Verizon Business 14.98ms from New York City, US
133.45.199.239 AS2907 Research Organization of Information and Systems, National Institute of Informatics 12.29ms from Osaka, JP
177.191.216.127 AS53006 ALGAR TELECOM S/A 1.23ms from Osasco, BR
5.142.69.175 AS12389 PJSC Rostelecom 17.51ms from Saint Petersburg, RU
73.109.38.111 AS7922 Comcast Cable Communications, LLC 14.63ms from Seattle, US
182.222.147.95 AS17858 LG POWERCOMM 2.09ms from Seoul, KR
135.106.113.127 AS44559 IT HOSTLINE LTD 0.32ms from Seoul, KR
58.98.152.63 AS9595 NTT-ME Corporation 7.63ms from Tokyo, JP
71.200.1.239 AS7922 Comcast Cable Communications, LLC 3.78ms from Ashburn, US
62.103.48.143 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.66ms from Athens, GR
221.237.51.207 AS4134 CHINANET-BACKBONE 4.11ms from Chengdu, CN

Traceroute

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

$
traceroute -a -n -q1 -f4 -m13 134.4.158.105
traceroute to 134.4.158.105 (134.4.158.105): 13 hops max, 52 byte packets
5 *
6 *
7 [AS3356] 4.35.156.66 30.138 ms
8 [AS2152] 137.164.11.111 30.149 ms
9 [AS2152] 137.164.3.75 30.606 ms
10 [AS31] 131.215.0.243 30.628 ms
11 *
12 *
13 *
Measurement taken from IPinfo ProbeNet in Dallas, US
On

Related Networks

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 AS31 at robtex.

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