131.215.230.0/24

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 131.215.230.0/24

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

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

IP Address	ASN	Details
131.215.230.20	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
78.87.117.8	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.03ms` from Athens, GR
186.116.156.152	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`6.28ms` from Bogotá, CO
109.133.162.136	AS5432 Proximus NV	`1.63ms` from Brussels, BE
99.19.19.8	AS7018 AT&T Enterprises, LLC	`7.33ms` from Dallas, US
87.164.229.120	AS3320 Deutsche Telekom AG	`4.11ms` from Duesseldorf, DE
217.11.186.56	AS24722 Babilon	`0.36ms` from Dushanbe, TJ
141.95.43.56	AS16276 OVH SAS	`0.10ms` from Frankfurt am Main, DE
18.195.254.8	AS16509 Amazon.com, Inc.	`0.15ms` from Frankfurt am Main, DE
70.95.52.88	AS20001 Charter Communications Inc	`6.83ms` from Los Angeles, US
74.48.96.152	AS35916 MULTACOM CORPORATION	`0.16ms` from Los Angeles, US
104.211.140.40	AS8075 Microsoft Corporation	`0.97ms` from Mumbai, IN
193.251.8.168	AS3215 Orange S.A.	`2.15ms` from Paris, FR
187.194.238.136	AS8151 UNINET	`6.33ms` from Santiago de Queretaro, MX
179.228.2.56	AS26599 TELEFÔNICA BRASIL S.A	`3.93ms` from Sao Paulo, BR
23.141.148.8	AS399613 Smestad Tech LLC	`2.89ms` from Boston, US
34.96.29.216	AS396982 Google LLC	`0.51ms` from Council Bluffs, US
18.192.201.184	AS16509 Amazon.com, Inc.	`0.15ms` from Frankfurt am Main, DE
218.247.93.152	AS139021 West263 International Limited	`1.46ms` from Hong Kong, HK
13.42.227.8	AS16509 Amazon.com, Inc.	`0.18ms` from London, GB
182.96.76.216	AS4134 CHINANET-BACKBONE	`3.45ms` from Nanchang, CN
118.109.37.56	AS2518 BIGLOBE Inc.	`5.55ms` from Osaka, JP
83.112.216.184	AS3215 Orange S.A.	`5.74ms` from Paris, FR
20.125.109.216	AS8075 Microsoft Corporation	`0.22ms` from Phoenix, US
200.142.176.72	AS61949 FACILITI TELECOM	`5.66ms` from Rio de Janeiro, BR
176.231.178.40	AS12400 Partner Communications Ltd.	`1.30ms` from Rosh Ha‘Ayin, IL

Traceroute

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

traceroute -a -n -q1 -f4 131.215.230.27

traceroute to 131.215.230.27 (131.215.230.27): 64 hops max, 52 byte packets

4 [AS13335] 141.101.72.34 0.921 ms

5 [AS13335] 172.69.32.125 0.951 ms

6 [AS13335] 172.69.32.133 0.976 ms

7 [AS13335] 172.69.32.203 1.098 ms

8 *

9 [AS31] 131.215.219.25 1.652 ms

10 [AS31] 131.215.219.9 1.554 ms

11 [AS31] 131.215.239.254 1.706 ms

12 [AS31] 131.215.230.27 1.764 ms

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On January 19th 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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