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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IP Ranges API

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
131.215.34.119 ████████ 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
192.41.208.49 AS31 California Institute of Technology 0.81ms from Los Angeles, US
131.215.47.254 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.10.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.140.79 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.230.245 AS31 California Institute of Technology 1.57ms from Los Angeles, US
131.215.190.8 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.41.254 AS31 California Institute of Technology 0.95ms from Los Angeles, US
131.215.135.186 AS31 California Institute of Technology 0.89ms from Los Angeles, US
131.215.154.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.157.254 AS31 California Institute of Technology 0.92ms from Los Angeles, US
131.215.151.35 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.243.254 AS31 California Institute of Technology 1.63ms from Los Angeles, US
131.215.100.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.143.36 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.18.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.102.45 AS31 California Institute of Technology 1.00ms from Los Angeles, US
131.215.114.14 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.132.138 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.31.245 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.116.137 AS31 California Institute of Technology 0.94ms from Los Angeles, US
131.215.133.254 AS31 California Institute of Technology 0.90ms from Los Angeles, US
131.215.44.13 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.226.254 AS31 California Institute of Technology 0.93ms from Los Angeles, US
131.215.189.254 AS31 California Institute of Technology 0.91ms from Los Angeles, US
131.215.110.254 AS31 California Institute of Technology 0.96ms 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
73.173.138.207 AS7922 Comcast Cable Communications, LLC 6.60ms from Ashburn, US
181.2.167.111 AS7303 Telecom Argentina S.A. 1.77ms from Buenos Aires, AR
106.202.143.255 AS24560 Bharti Airtel Ltd., Telemedia Services 9.33ms from Delhi, IN
216.239.188.143 AS23314 Summit Broadband 8.87ms from Miami, US
80.183.193.255 AS3269 Telecom Italia S.p.A. 4.51ms from Milan, IT
77.45.137.207 AS12389 PJSC Rostelecom 8.44ms from Moscow, RU
82.121.228.95 AS3215 Orange S.A. 1.85ms from Paris, FR
97.191.205.223 AS6167 Verizon Business 14.83ms from San Jose, US
58.146.207.255 AS9698 LG HelloVision Corp. 5.86ms from Seoul, KR
203.222.24.47 AS17809 VEE TIME CORP. 2.90ms from Taipei, TW
84.111.231.255 AS8551 Bezeq International Ltd. 1.22ms from Tel Aviv, IL
27.114.55.15 AS4713 NTT Communications Corporation 3.80ms from Tokyo, JP
217.96.166.207 AS5617 Orange Polska Spolka Akcyjna 7.92ms from Warsaw, PL
172.74.35.255 AS11426 Charter Communications Inc 10.66ms from Ashburn, US
71.200.1.239 AS7922 Comcast Cable Communications, LLC 3.67ms from Ashburn, US
47.3.16.175 AS19115 Charter Communications LLC 1.04ms from Charlotte, US
35.224.224.63 AS396982 Google LLC 0.13ms from Council Bluffs, US
72.190.33.191 AS11427 Charter Communications Inc 4.01ms from Dallas, US
188.140.110.223 AS42863 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 15.46ms from Lisbon, PT
94.156.187.239 AS210218 Open Fiber S.P.A. 1.04ms from Milan, IT
221.231.25.79 AS4134 CHINANET-BACKBONE 8.01ms from Nanjing, CN
96.232.128.175 AS701 Verizon Business 3.28ms from New York City, US
153.230.166.207 AS4713 NTT Communications Corporation 4.98ms from Osaka, JP
73.174.117.47 AS7922 Comcast Cable Communications, LLC 13.98ms from Piscataway, US
34.194.41.207 AS14618 Amazon.com, Inc. 0.19ms from Reston, US

Traceroute

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

$
traceroute -a -n -q1 -f4 -m10 134.4.50.156
traceroute to 134.4.50.156 (134.4.50.156): 10 hops max, 52 byte packets
4 [AS3356] 4.35.156.66 145.365 ms
5 [AS2152] 137.164.11.111 147.22 ms
6 [AS2152] 137.164.3.75 146.256 ms
7 [AS31] 131.215.0.243 146.169 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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