131.215.242.0/23

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
OriginAS:       31
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:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 131.215.242.0/23

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 3 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
131.215.242.43	brianlau.org	2
131.215.242.33	fanrank.net	1

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

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Pingable IPs

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

IP Address	ASN	Details
131.215.243.254	AS31 California Institute of Technology	1.54ms from Los Angeles, US
131.215.242.254	AS31 California Institute of Technology	1.61ms 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
83.212.136.135	AS8253 Democritus University of Thrace	13.75ms from Athens, GR
154.16.108.23	AS61317 Hivelocity LLC	0.56ms from Chicago, US
57.132.177.135	AS7459 Grande Communications Networks, LLC	6.28ms from Dallas, US
122.224.27.183	AS4134 CHINANET-BACKBONE	4.80ms from Hangzhou, CN
113.180.139.39	AS45899 VNPT Corp	4.80ms from Ho Chi Minh City, VN
110.138.38.55	AS7713 PT Telekomunikasi Indonesia	1.41ms from Jakarta, ID
97.182.117.55	AS6167 Verizon Business	17.63ms from Los Angeles, US
35.174.123.199	AS14618 Amazon.com, Inc.	0.20ms from Reston, US
213.80.146.247	AS15974 Joint Stock Company TransTeleCom	12.57ms from Samara, RU
71.224.19.247	AS7922 Comcast Cable Communications, LLC	7.00ms from Secaucus, US
197.15.128.151	AS37671 3S INF	5.26ms from Tunis, TN
23.78.38.7	AS16625 Akamai Technologies, Inc.	0.20ms from Copenhagen, DK
146.6.42.7	AS18 University of Texas at Austin	5.77ms from Dallas, US
3.28.81.119	AS16509 Amazon.com, Inc.	0.13ms from Dubai, AE
91.134.35.71	AS16276 OVH SAS	0.05ms from Gravelines, FR
218.56.212.135	AS4837 CHINA UNICOM China169 Backbone	3.59ms from Jinan, CN
86.143.215.247	AS2856 British Telecommunications PLC	5.25ms from London, GB
87.27.79.23	AS3269 Telecom Italia S.p.A.	2.60ms from Milan, IT
142.162.140.167	AS855 Bell Canada	15.84ms from Montreal, CA
20.226.8.7	AS8075 Microsoft Corporation	0.18ms from Sao Paulo, BR
114.56.136.55	AS16509 Amazon.com, Inc.	5.76ms from Seattle, US
119.213.193.231	AS4766 Korea Telecom	2.35ms from Seoul, KR
39.124.76.167	AS9318 SK Broadband Co Ltd	1.32ms from Seoul, KR
192.185.30.199	AS19871 Network Solutions, LLC	0.35ms from Atlanta, US
80.184.84.103	AS6412 KEMS Block-A, Floor 7, Souq Al-Kabeer Kuwait City, State of Kuwait P O Box 3623, Safat 13037 KW	1.27ms from Kuwait City, KW

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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