Autonomous System 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 95
IPv4 addresses 131,840
IPv6 addresses 79,228,162,514,264,338,000,000,000,000
ASN type Education
Registry arin
Allocated 42 years ago on Sep 21, 1984
Updated 3 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 95 domain names hosted across 55 IP addresses on this ASN.

IP Address Domain Domains on this IP
131.215.242.9 ██████████ 11
131.215.140.111 ██████████ 6
134.4.74.17 ██████████ 6
131.215.198.54 ██████████ 5
131.215.76.24 ██████████ 3
131.215.176.71 ██████████ 3
131.215.66.188 ██████████ 3
131.215.113.72 ██████████ 3
131.215.5.239 ██████████ 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

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

IP Address ASN Details
131.215.239.27 AS31 California Institute of Technology 1.43ms from Los Angeles, US
134.4.13.10 AS31 California Institute of Technology 1.35ms from Los Angeles, US
131.215.108.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.41.254 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.143.36 AS31 California Institute of Technology 0.85ms from Los Angeles, US
131.215.138.5 AS31 California Institute of Technology 0.86ms from Los Angeles, US
131.215.172.254 AS31 California Institute of Technology 0.87ms from Los Angeles, US
131.215.44.13 AS31 California Institute of Technology 0.85ms from Los Angeles, US
131.215.40.71 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.157.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.127.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.27.17 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.243.254 AS31 California Institute of Technology 1.57ms from Los Angeles, US
131.215.67.175 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.240.254 AS31 California Institute of Technology 1.51ms from Los Angeles, US
131.215.166.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.12.175 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.245.254 AS31 California Institute of Technology 1.62ms from Los Angeles, US
131.215.187.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.186.254 AS31 California Institute of Technology 0.88ms from Los Angeles, US
131.215.159.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.102.45 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.71.5 AS31 California Institute of Technology 0.86ms from Los Angeles, US
131.215.199.254 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.228.7 AS31 California Institute of Technology 0.84ms 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
223.116.72.255 AS9808 China Mobile Communications Group Co., Ltd. 2.90ms from Changji, CN
175.154.174.143 AS4837 CHINA UNICOM China169 Backbone 3.45ms from Chengdu, CN
212.116.226.207 AS214208 Elisteka UAB 0.09ms from Hong Kong, HK
24.133.41.63 AS47524 Turksat Uydu Haberlesme ve Kablo TV Isletme A.S. 2.73ms from Istanbul, TR
108.206.40.47 AS7018 AT&T Enterprises, LLC 2.12ms from Miami, US
100.37.131.63 AS701 Verizon Business 2.10ms from New York City, US
187.38.1.15 AS28573 Claro NXT Telecomunicacoes Ltda 4.22ms from Osasco, BR
158.23.49.31 AS8075 Microsoft Corporation 0.17ms from Santiago de Querétaro, MX
187.182.168.79 AS28573 Claro NXT Telecomunicacoes Ltda 2.78ms from Sao Paulo, BR
49.31.214.47 AS4766 Korea Telecom 7.04ms from Seoul, KR
79.184.5.63 AS5617 Orange Polska Spolka Akcyjna 2.20ms from Warsaw, PL
216.212.225.143 AS16700 CNSNext 14.89ms from Atlanta, US
113.240.179.159 AS4134 CHINANET-BACKBONE 2.77ms from Changsha, CN
187.95.96.143 AS14868 Ligga Telecomunicações S.A. 1.79ms from Curitiba, BR
99.80.88.239 AS16509 Amazon.com, Inc. 0.32ms from Dublin, IE
52.18.137.79 AS16509 Amazon.com, Inc. 0.15ms from Dublin, IE
8.208.81.79 AS45102 Alibaba (US) Technology Co., Ltd. 0.54ms from London, GB
75.241.57.63 AS6167 Verizon Business 17.88ms from Los Angeles, US
121.227.78.255 AS4134 CHINANET-BACKBONE 4.87ms from Nanjing, CN
92.169.119.111 AS3215 Orange S.A. 2.56ms from Paris, FR
174.97.224.111 AS10796 Charter Communications Inc 12.14ms from Cleveland, US
54.229.166.127 AS16509 Amazon.com, Inc. 0.18ms from Dublin, IE
217.95.71.63 AS3320 Deutsche Telekom AG 1.57ms from Frankfurt am Main, DE
183.232.59.47 AS9808 China Mobile Communications Group Co., Ltd. 3.76ms from Guangzhou, CN
61.47.193.255 AS17597 SK Broadband Co Ltd 1.48ms from Incheon, KR

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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