131.215.240.0/24

AS31 · California Institute of Technology

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Summary

Country	United States
Domain	caltech.edu
ASN	AS31
Parent Range	131.215.0.0/16
Registry	ARIN
ID	CALTECH-NET

WHOIS Details

NetHandle:      NET-131-215-0-0-1
OrgID:          CIT-4-Z
Parent:         NET-131-0-0-0-0
NetName:        CALTECH-NET
NetRange:       131.215.0.0 - 131.215.255.255
NetType:        allocation
RegDate:        1989-01-19
Updated:        2023-08-29
TechHandle:     CI2-ORG-ARIN
AbuseHandle:    CI2-ORG-ARIN
NOCHandle:      CI2-ORG-ARIN
Source:         ARIN


OrgID:          CIT-4-Z
OrgName:        California Institute of Technology
CanAllocate:    
Street:         1200 East California Boulevard
Street:         MS 1-10
City:           Pasadena
State/Prov:     CA
Country:        US
PostalCode:     91125
RegDate:        2023-08-22
Updated:        2023-08-22
OrgAdminHandle: CI2-ORG-ARIN
OrgTechHandle:  CI2-ORG-ARIN
OrgAbuseHandle: CI2-ORG-ARIN
Source:         ARIN


POCHandle:      CI2-ORG-ARIN
IsRole:         Y
LastName:       Caltech Network Operations Center
FirstName:      
Street:         1200 East California Boulevard
Street:         MS 1-10
City:           Pasadena
State/Prov:     CA
Country:        US
PostalCode:     91125
RegDate:        1998-07-29
Updated:        2025-07-22
OfficePhone:    +1-626-395-3500
Mailbox:        noc@caltech.edu
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 131.215.240.0/24

Range	ASN	Company	Num of IPs
131.215.0.0/16	AS31	California Institute of Technology	65,536

Nearby Ranges

BGP prefixes that overlap with 131.215.0.0/16

Range	ASN	Company	Num of IPs
131.215.0.0/16	AS31	California Institute of Technology	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
131.215.240.101	AS31 California Institute of Technology	`1.51ms` 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
66.42.227.120	AS6181 Cincinnati Bell Telephone Company LLC	`0.89ms` from Cincinnati, US
122.182.152.184	AS24560 Bharti Airtel Ltd., Telemedia Services	`6.40ms` from Delhi, IN
54.216.201.104	AS16509 Amazon.com, Inc.	`0.22ms` from Dublin, IE
121.199.203.232	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.06ms` from Hangzhou, CN
76.169.89.216	AS20001 Charter Communications Inc	`4.26ms` from Los Angeles, US
172.91.47.40	AS20001 Charter Communications Inc	`4.74ms` from Los Angeles, US
81.251.167.216	AS3215 Orange S.A.	`7.38ms` from Marseille, FR
185.24.192.24	AS60697 Association de moyens klesia	`2.89ms` from Marseille, FR
14.2.136.88	AS4739 Internode Pty Ltd	`13.33ms` from Melbourne, AU
167.62.112.24	AS6057 Administracion Nacional de Telecomunicaciones	`1.54ms` from Montevideo, UY
73.93.60.24	AS7922 Comcast Cable Communications, LLC	`6.61ms` from San Jose, US
24.16.59.136	AS7922 Comcast Cable Communications, LLC	`7.14ms` from Seattle, US
106.181.39.104	AS2516 KDDI CORPORATION	`7.19ms` from Tokyo, JP
161.33.205.56	AS31898 Oracle Corporation	`0.39ms` from Tokyo, JP
95.110.48.232	AS28812 PJSC "Bashinformsvyaz"	`9.05ms` from Yekaterinburg, RU
80.158.58.184	AS6878 T-Systems International GmbH	`2.49ms` from Berlin, DE
123.253.190.184	AS134090 Leaptel	`0.51ms` from Brisbane, AU
184.60.223.8	AS55083 Numerex Corp	`4.54ms` from Chicago, US
58.63.233.56	AS4134 CHINANET-BACKBONE	`2.10ms` from Guangzhou, CN
43.199.136.232	AS16509 Amazon.com, Inc.	`0.60ms` from Hong Kong, HK
94.54.116.56	AS47524 Turksat Uydu Haberlesme ve Kablo TV Isletme A.S.	`14.90ms` from Istanbul, TR
86.163.211.40	AS2856 British Telecommunications PLC	`2.52ms` from London, GB
76.114.107.88	AS7922 Comcast Cable Communications, LLC	`8.65ms` from Murfreesboro, US
46.180.228.216	AS39927 E-Light-Telecom Ltd.	`4.58ms` from Novosibirsk, RU
91.175.45.24	AS12322 Free SAS	`2.36ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f6 131.215.240.142

traceroute to 131.215.240.142 (131.215.240.142): 64 hops max, 52 byte packets

6 [AS31] 131.215.240.142 181.823 ms

Measurement taken from

IPinfo ProbeNet in Novo Hamburgo, BR

On December 28th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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