AS number details

AS31

California Institute of Technology  ·  caltech.edu

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AS31 – California Institute of Technology

Field Value
Country United States
Website caltech.edu
Hosted domains 104
Number of IPv4 131,840
Number of IPv6 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
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


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

IP Address Domain Domains on this IP
131.215.239.20 ██████████ 13
134.4.74.17 ██████████ 6
131.215.140.111 ██████████ 6
131.215.198.54 ██████████ 5
131.215.68.28 ██████████ 4
131.215.66.188 ██████████ 4
131.215.113.72 ██████████ 4
131.215.76.24 ██████████ 3
131.215.176.71 ██████████ 3
131.215.140.234 ██████████ 2

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Useful for Cybersecurity

Peers

There are 3 peers for this ASN.

Peers Name
AS13335 Cloudflare, Inc.
AS2152 CENIC
AS2153 CENIC
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Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS13335 Cloudflare, Inc.
AS2152 CENIC
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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address ASN Details
131.215.100.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.35.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.153.254 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.150.1 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.226.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.169.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.207.5 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.124.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.57.254 AS31 California Institute of Technology 1.00ms from Los Angeles, US
192.12.19.254 AS31 California Institute of Technology 0.83ms from Los Angeles, US
131.215.244.254 AS31 California Institute of Technology 1.59ms from Los Angeles, US
131.215.155.146 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.43.254 AS31 California Institute of Technology 0.96ms from Los Angeles, US
131.215.133.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.158.254 AS31 California Institute of Technology 0.99ms from Los Angeles, US
131.215.168.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.59.254 AS31 California Institute of Technology 0.96ms from Los Angeles, US
131.215.96.184 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.22.16 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.41.254 AS31 California Institute of Technology 0.95ms from Los Angeles, US
131.215.38.254 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.14.152 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.242.254 AS31 California Institute of Technology 1.55ms from Los Angeles, US
131.215.119.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.130.5 AS31 California Institute of Technology 0.97ms 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
14.18.153.191 AS4134 CHINANET-BACKBONE 2.31ms from Guangzhou, CN
119.29.159.79 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.99ms from Guangzhou, CN
39.41.201.175 AS17557 Pakistan Telecommunication Company Limited 6.72ms from Islamabad, PK
218.27.29.47 AS4837 CHINA UNICOM China169 Backbone 13.55ms from Liaoyang, CN
151.2.153.175 AS31655 Gamma Telecom Holdings Ltd 2.88ms from London, GB
176.144.128.63 AS5410 Bouygues Telecom SA 2.39ms from Marseille, FR
186.53.173.159 AS6057 Administracion Nacional de Telecomunicaciones 1.62ms from Montevideo, UY
77.242.57.95 AS49129 LTD CGC Co 0.94ms from Tbilisi, GE
27.24.87.63 AS4134 CHINANET-BACKBONE 4.84ms from Wuhan, CN
54.148.4.15 AS16509 Amazon.com, Inc. 0.12ms from Boardman, US
47.3.16.175 AS19115 Charter Communications LLC 1.04ms from Charlotte, US
84.142.186.159 AS3320 Deutsche Telekom AG 8.54ms from Frankfurt am Main, DE
115.230.66.15 AS4134 CHINANET-BACKBONE 11.36ms from Hangzhou, CN
78.186.185.127 AS9121 Turk Telekomunikasyon Anonim Sirketi 1.69ms from Istanbul, TR
103.135.153.255 AS38320 PT Maxindo Mitra Solusi 1.68ms from Jakarta, ID
4.159.3.175 AS8075 Microsoft Corporation 0.16ms from London, GB
80.42.39.255 AS9105 TalkTalk Communications Limited 1.71ms from London, GB
83.56.82.95 AS3352 TELEFONICA DE ESPANA S.A.U. 1.19ms from Madrid, ES
189.13.133.191 AS7738 V tal 7.81ms from Osasco, BR
184.179.161.127 AS22773 Cox Communications Inc. 7.23ms from Phoenix, US
189.167.45.175 AS8151 UNINET 7.60ms from Santiago de Queretaro, MX
59.27.175.15 AS4766 Korea Telecom 4.29ms from Seoul, KR
123.212.34.127 AS9318 SK Broadband Co Ltd 3.92ms from Seoul, KR
24.206.103.63 AS55256 Netskope Inc 0.11ms from Stockholm, SE
182.117.113.79 AS4837 CHINA UNICOM China169 Backbone 2.98ms from Zhengzhou, CN

Traceroute

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

$
traceroute -a -n -q1 131.215.35.49
traceroute to 131.215.35.49 (131.215.35.49): 64 hops max, 52 byte packets
1 [AS15169] 66.249.94.36 31.763 ms
2 *
3 [AS2152] 137.164.3.75 34.111 ms
4 [AS31] 131.215.219.25 33.941 ms
5 [AS31] 131.215.219.9 34.325 ms
6 [AS31] 131.215.218.50 34.307 ms
7 [AS31] 131.215.35.49 34.339 ms
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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