131.215.239.0/24

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 131.215.239.0/24

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 4 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
131.215.239.20	islaurenintown.com	4

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

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

IP Address	ASN	Details
131.215.239.38	AS31 California Institute of Technology	`1.52ms` 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
62.3.49.200	AS212963 Sergio Bejarano Romero	`18.55ms` from Barcelona, ES
23.117.11.248	AS7018 AT&T Enterprises, LLC	`8.57ms` from Chicago, US
184.57.13.120	AS10796 Charter Communications Inc	`6.88ms` from Columbus, US
178.75.183.248	AS16086 DNA Oyj	`6.56ms` from Helsinki, FI
72.199.177.216	AS22773 Cox Communications Inc.	`8.04ms` from Los Angeles, US
79.153.194.8	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.51ms` from Madrid, ES
150.244.92.8	AS766 RedIRIS Autonomous System	`2.30ms` from Madrid, ES
69.139.36.120	AS7922 Comcast Cable Communications, LLC	`3.79ms` from Miami, US
188.172.187.72	AS136787 PacketHub S.A.	`0.37ms` from New York City, US
149.117.15.8	AS3356 Level 3 Parent, LLC	`1.88ms` from Santiago, CL
187.233.146.88	AS8151 UNINET	`11.65ms` from Santiago de Queretaro, MX
177.84.17.136	AS53005 REDE CONNECT TELECOMUNICACOES LTDA	`16.65ms` from São Paulo, BR
89.78.127.200	AS9141 P4 Sp. z o.o.	`14.18ms` from Warsaw, PL
60.9.93.152	AS4837 CHINA UNICOM China169 Backbone	`11.05ms` from Beijing, CN
217.253.79.40	AS3320 Deutsche Telekom AG	`2.67ms` from Duesseldorf, DE
86.180.194.24	AS2856 British Telecommunications PLC	`3.56ms` from London, GB
90.171.41.152	AS12479 Orange Espagne SA	`2.67ms` from Madrid, ES
130.222.37.200	AS245 Planning Research Corporation	`0.06ms` from Manassas, US
178.178.222.56	AS25159 PJSC MegaFon	`14.79ms` from Moscow, RU
104.85.139.136	AS55836 Reliance Jio Infocomm Limited	`0.50ms` from Mumbai, IN
121.235.49.104	AS4134 CHINANET-BACKBONE	`5.04ms` from Nanjing, CN
88.176.28.232	AS12322 Free SAS	`2.03ms` from Paris, FR
187.67.64.56	AS28573 Claro NXT Telecomunicacoes Ltda	`1.13ms` from Rio de Janeiro, BR
91.211.46.216	AS48481 KINGISEPP-ONLINE Ltd.	`3.08ms` from Saint Petersburg, RU
179.152.209.104	AS28573 Claro NXT Telecomunicacoes Ltda	`5.13ms` from Sao Paulo, BR

Traceroute

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

traceroute -a -n -q1 -f4 131.215.239.85

traceroute to 131.215.239.85 (131.215.239.85): 64 hops max, 52 byte packets

4 [AS201011] 81.95.9.68 0.24 ms

5 [AS201011] 5.56.19.17 6.246 ms

6 [AS201011] 81.95.9.207 16.893 ms

7 [AS13335] 162.158.84.125 8.478 ms

8 *

9 *

10 *

11 *

12 [AS31] 131.215.219.29 156.048 ms

13 [AS31] 131.215.219.9 156.082 ms

14 *

15 *

16 [AS31] 131.215.239.85 154.511 ms

Measurement taken from

IPinfo ProbeNet in Zuerich, CH

On January 9th 2026

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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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