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AS31
California Institute of Technology·
IP address details
AS31
California Institute of Technology·
  • Summary IP.CC
  • Prefixes
  • Peers
  • Upstream
  • Downstream
  • Graphs
  • World Map
  • WHOIS Details
  • IX

Summary

  • As Number
    AS31
  • Org Name
    California Institute of Technology
  • Country
  • Country Code
  • Website
  • Regional Registry
    IANA
  • Allocated Date
    21st September 1984
  • Allocated Status
    Assigned
  • Ipv4 Prefixes
    7
  • Ipv6 Prefixes
    1
  • Ipv4 Peers
    3
  • Ipv6 Peers
    1
  • Ipv4 Upstreams
    2
  • Ipv6 Upstreams
    1

Prefixes

There are 7 IPv4 Prefixes for this ASN.

Country
Announced Prefix
Description
Parent Prefix
RIR
United States131.215.0.0/16
California Institute of Technology
--ARIN
United States131.215.229.0/24
California Institute of Technology
131.215.0.0/16ARIN
United States131.215.234.0/24
California Institute of Technology
131.215.0.0/16ARIN
United States134.4.0.0/16
California Institute of Technology
--ARIN
United States192.12.19.0/24
California Institute of Technology
--ARIN
United States192.31.43.0/24
California Institute of Technology
--ARIN
United States192.41.208.0/24
California Institute of Technology
--ARIN
  • 1
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges APIIP.CC
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges APIIP.CC

Peers

There are 3 IPv4 Peers for this ASN.

Country
ASN
Description
IPv6
United StatesAS13335
Cloudflare, Inc.
false
United StatesAS2152
CENIC
true
AS2153
CENIC
false
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Upstream

There are 2 IPv4 Upstreams for this ASN.

Country
ASN
Description
IPv6
United StatesAS13335
Cloudflare, Inc.
false
United StatesAS2152
CENIC
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Downstream

There are 0 IPv4 Downstreams for this ASN.

Country
ASN
Description
IPv6
暂无数据
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Graphs

AS31 Combined Upstream Graph AS31 AS31 AS226 AS226 AS31->AS226 AS2152 AS2152 AS31->AS2152 AS13335 AS13335 AS31->AS13335 AS2914 AS2914 AS226->AS2914 AS6939 AS6939 AS226->AS6939 AS3356 AS3356 AS2152->AS3356 AS13335->AS2914 AS3257 AS3257 AS13335->AS3257 AS2497 AS2497 AS13335->AS2497 AS1299 AS1299 AS13335->AS1299 AS13335->AS3356 AS1239 AS1239 AS13335->AS1239 AS2914->AS3257 AS7018 AS7018 AS2914->AS7018 AS2914->AS2497 AS6939->AS1299 AS3549 AS3549 AS3356->AS3549 AS209 AS209 AS3356->AS209
AS31 Combined Upstream Graph AS31 AS31 AS226 AS226 AS31->AS226 AS2152 AS2152 AS31->AS2152 AS13335 AS13335 AS31->AS13335 AS2914 AS2914 AS226->AS2914 AS6939 AS6939 AS226->AS6939 AS3356 AS3356 AS2152->AS3356 AS13335->AS2914 AS3257 AS3257 AS13335->AS3257 AS2497 AS2497 AS13335->AS2497 AS1299 AS1299 AS13335->AS1299 AS13335->AS3356 AS1239 AS1239 AS13335->AS1239 AS2914->AS3257 AS7018 AS7018 AS2914->AS7018 AS2914->AS2497 AS6939->AS1299 AS3549 AS3549 AS3356->AS3549 AS209 AS209 AS3356->AS209

World Map

WHOIS Details


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber: 31
ASName: CIT
ASHandle: AS31
RegDate: 1984-09-21
Updated: 2023-08-29
Ref: https://rdap.arin.net/registry/autnum/31


OrgName: California Institute of Technology
OrgId: CIT-4-Z
Address: 1200 East California Boulevard
Address: MS 1-10
City: Pasadena
StateProv: CA
PostalCode: 91125
Country: US
RegDate: 2023-08-22
Updated: 2023-08-22
Ref: https://rdap.arin.net/registry/entity/CIT-4-Z


OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName: Caltech Network Operations Center
OrgAbusePhone: +1-626-395-3500
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgTechHandle: CI2-ORG-ARIN
OrgTechName: Caltech Network Operations Center
OrgTechPhone: +1-626-395-3500
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName: Caltech Network Operations Center
RTechPhone: +1-626-395-3500
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber: 31
ASName: CIT
ASHandle: AS31
RegDate: 1984-09-21
Updated: 2023-08-29
Ref: https://rdap.arin.net/registry/autnum/31


OrgName: California Institute of Technology
OrgId: CIT-4-Z
Address: 1200 East California Boulevard
Address: MS 1-10
City: Pasadena
StateProv: CA
PostalCode: 91125
Country: US
RegDate: 2023-08-22
Updated: 2023-08-22
Ref: https://rdap.arin.net/registry/entity/CIT-4-Z


OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName: Caltech Network Operations Center
OrgAbusePhone: +1-626-395-3500
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgTechHandle: CI2-ORG-ARIN
OrgTechName: Caltech Network Operations Center
OrgTechPhone: +1-626-395-3500
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName: Caltech Network Operations Center
RTechPhone: +1-626-395-3500
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

IX

Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
IP.CC
Search
IP address details
AS31
California Institute of Technology·
IP address details
AS31
California Institute of Technology·

Summary

  • As Number
    AS31
  • Org Name
    California Institute of Technology
  • Country
  • Country Code
  • Website
  • Regional Registry
    IANA
  • Allocated Date
    21st September 1984
  • Allocated Status
    Assigned
  • Ipv4 Prefixes
    7
  • Ipv6 Prefixes
    1
  • Ipv4 Peers
    3
  • Ipv6 Peers
    1
  • Ipv4 Upstreams
    2
  • Ipv6 Upstreams
    1

Prefixes

There are 7 IPv4 Prefixes for this ASN.

Country
Announced Prefix
Description
Parent Prefix
RIR
United States131.215.0.0/16
California Institute of Technology
--ARIN
United States131.215.229.0/24
California Institute of Technology
131.215.0.0/16ARIN
United States131.215.234.0/24
California Institute of Technology
131.215.0.0/16ARIN
United States134.4.0.0/16
California Institute of Technology
--ARIN
United States192.12.19.0/24
California Institute of Technology
--ARIN
United States192.31.43.0/24
California Institute of Technology
--ARIN
United States192.41.208.0/24
California Institute of Technology
--ARIN
  • 1
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges APIIP.CC
IP Ranges API
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
Useful for GameTech, and Advertising Technology
IP Ranges APIIP.CC

Peers

There are 3 IPv4 Peers for this ASN.

Country
ASN
Description
IPv6
United StatesAS13335
Cloudflare, Inc.
false
United StatesAS2152
CENIC
true
AS2153
CENIC
false
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Upstream

There are 2 IPv4 Upstreams for this ASN.

Country
ASN
Description
IPv6
United StatesAS13335
Cloudflare, Inc.
false
United StatesAS2152
CENIC
true
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Downstream

There are 0 IPv4 Downstreams for this ASN.

Country
ASN
Description
IPv6
暂无数据
  • 1
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC
ASN data
ASN details for every IP address and every ASN’s related domains, allocation date, registry name, total number of IP addresses, and assigned prefixes.
Useful for Cybersecurity
ASN APIIP.CCASN DatabaseIP.CC

Graphs

AS31 Combined Upstream Graph AS31 AS31 AS226 AS226 AS31->AS226 AS2152 AS2152 AS31->AS2152 AS13335 AS13335 AS31->AS13335 AS2914 AS2914 AS226->AS2914 AS6939 AS6939 AS226->AS6939 AS3356 AS3356 AS2152->AS3356 AS13335->AS2914 AS3257 AS3257 AS13335->AS3257 AS2497 AS2497 AS13335->AS2497 AS1299 AS1299 AS13335->AS1299 AS13335->AS3356 AS1239 AS1239 AS13335->AS1239 AS2914->AS3257 AS7018 AS7018 AS2914->AS7018 AS2914->AS2497 AS6939->AS1299 AS3549 AS3549 AS3356->AS3549 AS209 AS209 AS3356->AS209
AS31 Combined Upstream Graph AS31 AS31 AS226 AS226 AS31->AS226 AS2152 AS2152 AS31->AS2152 AS13335 AS13335 AS31->AS13335 AS2914 AS2914 AS226->AS2914 AS6939 AS6939 AS226->AS6939 AS3356 AS3356 AS2152->AS3356 AS13335->AS2914 AS3257 AS3257 AS13335->AS3257 AS2497 AS2497 AS13335->AS2497 AS1299 AS1299 AS13335->AS1299 AS13335->AS3356 AS1239 AS1239 AS13335->AS1239 AS2914->AS3257 AS7018 AS7018 AS2914->AS7018 AS2914->AS2497 AS6939->AS1299 AS3549 AS3549 AS3356->AS3549 AS209 AS209 AS3356->AS209

World Map

WHOIS Details


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber: 31
ASName: CIT
ASHandle: AS31
RegDate: 1984-09-21
Updated: 2023-08-29
Ref: https://rdap.arin.net/registry/autnum/31


OrgName: California Institute of Technology
OrgId: CIT-4-Z
Address: 1200 East California Boulevard
Address: MS 1-10
City: Pasadena
StateProv: CA
PostalCode: 91125
Country: US
RegDate: 2023-08-22
Updated: 2023-08-22
Ref: https://rdap.arin.net/registry/entity/CIT-4-Z


OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName: Caltech Network Operations Center
OrgAbusePhone: +1-626-395-3500
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgTechHandle: CI2-ORG-ARIN
OrgTechName: Caltech Network Operations Center
OrgTechPhone: +1-626-395-3500
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName: Caltech Network Operations Center
RTechPhone: +1-626-395-3500
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber: 31
ASName: CIT
ASHandle: AS31
RegDate: 1984-09-21
Updated: 2023-08-29
Ref: https://rdap.arin.net/registry/autnum/31


OrgName: California Institute of Technology
OrgId: CIT-4-Z
Address: 1200 East California Boulevard
Address: MS 1-10
City: Pasadena
StateProv: CA
PostalCode: 91125
Country: US
RegDate: 2023-08-22
Updated: 2023-08-22
Ref: https://rdap.arin.net/registry/entity/CIT-4-Z


OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName: Caltech Network Operations Center
OrgAbusePhone: +1-626-395-3500
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgTechHandle: CI2-ORG-ARIN
OrgTechName: Caltech Network Operations Center
OrgTechPhone: +1-626-395-3500
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName: Caltech Network Operations Center
RTechPhone: +1-626-395-3500
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/CI2-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

IX

Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
Country
IX
IPv4
IPv6
Port Speed
暂无数据
  • 1
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What is an ASN?
Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
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