131.215.234.0/24

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 131.215.234.0/24

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

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

IP Address	ASN	Details
131.215.234.254	AS31 California Institute of Technology	`1.54ms` 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
50.126.223.40	AS5650 Frontier Communications of America, Inc.	`10.47ms` from Ashburn, US
74.119.127.184	AS62759 Reedsburg Utility Commission	`8.40ms` from Chicago, US
76.197.25.56	AS7018 AT&T Enterprises, LLC	`2.11ms` from Dallas, US
52.17.23.232	AS16509 Amazon.com, Inc.	`0.20ms` from Dublin, IE
84.188.150.152	AS3320 Deutsche Telekom AG	`3.67ms` from Hamburg, DE
120.26.178.40	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`5.93ms` from Hangzhou, CN
182.214.224.104	AS17858 LG POWERCOMM	`1.88ms` from Incheon, KR
222.235.166.56	AS9318 SK Broadband Co Ltd	`5.53ms` from Incheon, KR
126.92.66.40	AS17676 SoftBank Corp.	`4.05ms` from Osaka, JP
75.211.180.88	AS6167 Verizon Business	`11.31ms` from Santa Clara, US
142.132.78.72	AS22686 University of Winnipeg	`9.26ms` from Saskatoon, CA
115.7.26.216	AS4766 Korea Telecom	`9.55ms` from Seoul, KR
210.240.44.200	AS1659 Taiwan Academic Network (TANet) Information Center	`6.97ms` from Taipei, TW
47.14.151.152	AS20115 Charter Communications LLC	`12.80ms` from Ashburn, US
172.127.122.8	AS7018 AT&T Enterprises, LLC	`2.96ms` from Dallas, US
94.204.225.216	AS15802 Emirates Integrated Telecommunications Company PJSC	`3.34ms` from Dubai, AE
113.23.88.200	AS18403 FPT Telecom Company	`1.25ms` from Hanoi, VN
87.92.32.168	AS16086 DNA Oyj	`0.76ms` from Helsinki, FI
115.77.153.184	AS7552 Viettel Group	`1.07ms` from Ho Chi Minh City, VN
103.90.249.232	AS137286 PT. Arupa Cloud Nusantara	`1.65ms` from Jakarta, ID
134.199.26.200	AS23089 Hotwire Communications	`7.89ms` from Miami, US
82.191.103.8	AS3269 Telecom Italia S.p.A.	`5.35ms` from Milan, IT
76.68.80.120	AS577 Bell Canada	`4.36ms` from Montreal, CA
95.191.127.56	AS12389 PJSC Rostelecom	`17.10ms` from Moscow, RU
97.102.159.136	AS33363 Charter Communications, Inc	`10.83ms` from Orlando, US

Traceroute

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

traceroute -a -n -q1 -f4 131.215.234.254

traceroute to 131.215.234.254 (131.215.234.254): 64 hops max, 52 byte packets

4 [AS13335] 162.158.236.11 10.893 ms

5 [AS13335] 162.158.237.154 0.842 ms

6 [AS13335] 162.158.237.124 0.944 ms

7 [AS13335] 162.158.237.185 1.052 ms

8 *

9 [AS31] 131.215.219.29 165.685 ms

10 [AS31] 131.215.219.17 173.635 ms

11 [AS31] 131.215.234.254 166.11 ms

Measurement taken from

IPinfo ProbeNet in Helsinki, FI

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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