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 99
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 99 domain names hosted across 57 IP addresses on this ASN.

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IP Address Domain Domains on this IP
131.215.239.20 ██████████ 7
131.215.140.111 ██████████ 6
134.4.74.17 ██████████ 6
131.215.242.9 ██████████ 6
131.215.198.54 ██████████ 5
131.215.66.188 ██████████ 4
131.215.113.72 ██████████ 3
131.215.76.24 ██████████ 3
131.215.176.71 █████████ 3
131.215.5.239 ██████████ 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
131.215.224.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.196.254 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.207.6 AS31 California Institute of Technology 0.83ms from Los Angeles, US
131.215.210.175 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.110.203 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.199.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.200.254 AS31 California Institute of Technology 0.86ms from Los Angeles, US
131.215.54.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.31.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.107.222 AS31 California Institute of Technology 0.88ms from Los Angeles, US
134.4.57.210 AS31 California Institute of Technology 1.29ms from Los Angeles, US
131.215.58.254 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.47.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.118.148 AS31 California Institute of Technology 0.84ms from Los Angeles, US
131.215.219.10 AS31 California Institute of Technology 0.74ms from Los Angeles, US
131.215.35.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.229.254 AS31 California Institute of Technology 1.48ms from Los Angeles, US
131.215.141.79 AS31 California Institute of Technology 0.86ms from Los Angeles, US
131.215.19.195 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.135.186 AS31 California Institute of Technology 0.86ms from Los Angeles, US
134.4.13.10 AS31 California Institute of Technology 1.39ms from Los Angeles, US
131.215.68.254 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.226.134 AS31 California Institute of Technology 0.85ms from Los Angeles, US
131.215.51.11 AS31 California Institute of Technology 0.85ms from Los Angeles, US
131.215.150.1 AS31 California Institute of Technology 0.86ms 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
81.165.125.95 AS6848 Telenet BV 7.25ms from Brussels, BE
86.43.161.191 AS5466 Eircom Limited 4.56ms from Dublin, IE
196.39.38.63 AS20011 Dimension Data 1.52ms from Johannesburg, ZA
109.184.18.255 AS12389 PJSC Rostelecom 6.51ms from Kazan, RU
92.171.154.79 AS3215 Orange S.A. 14.99ms from Marseille, FR
76.153.252.95 AS7922 Comcast Cable Communications, LLC 5.59ms from Miami, US
121.227.78.255 AS4134 CHINANET-BACKBONE 4.95ms from Nanjing, CN
61.245.209.31 AS131934 ICC Corporation 11.97ms from Osaka, JP
68.230.23.175 AS22773 Cox Communications Inc. 4.46ms from Phoenix, US
174.52.103.207 AS7922 Comcast Cable Communications, LLC 7.23ms from Salt Lake City, US
98.248.195.15 AS7922 Comcast Cable Communications, LLC 10.06ms from San Jose, US
189.171.115.111 AS8151 UNINET 3.38ms from Santiago de Queretaro, MX
175.232.128.111 AS4766 Korea Telecom 3.03ms from Seoul, KR
115.161.34.191 AS9689 SK Broadband Co Ltd 7.93ms from Seoul, KR
114.67.103.127 AS4811 China Telecom (Group) 3.35ms from Shanghai, CN
111.220.199.191 AS9443 Vocus Retail 1.77ms from Sydney, AU
126.37.101.127 AS17676 SoftBank Corp. 8.70ms from Tokyo, JP
62.103.48.143 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.59ms from Athens, GR
222.218.121.255 AS4134 CHINANET-BACKBONE 13.97ms from Guiyang, CN
129.173.239.255 AS8111 Dalhousie University 0.33ms from Halifax, CA
42.86.198.175 AS4837 CHINA UNICOM China169 Backbone 8.88ms from Liaoyang, CN
37.213.15.31 AS6697 Republican Unitary Telecommunication Enterprise Beltelecom 5.27ms from Minsk, BY
110.199.17.255 AS56046 China Mobile communications corporation 10.26ms from Suqian, CN
197.15.60.79 AS37671 3S INF 6.53ms from Tunis, TN
99.84.80.143 AS16509 Amazon.com, Inc. 0.10ms from Vienna, AT

Traceroute

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

$
traceroute -a -n -q1 -m7 134.4.103.118
traceroute to 134.4.103.118 (134.4.103.118): 7 hops max, 52 byte packets
1 [AS15169] 66.249.94.36 45.974 ms
2 *
3 [AS2152] 137.164.3.75 51.654 ms
4 [AS31] 131.215.0.243 51.52 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Council Bluffs, 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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