AS31 California Institute of Technology

CIT

IPv4 Addresses: 131,840

Number of Peers: 5

Number of Prefixes: 13

ASN Allocated: Assigned

ASN
Prefixes
Peers
Upstreams
Graphs
World Map
Raw Whois

AS31 Summary

Regional Registry:

IANA

Allocation Status:

Assigned

AS31 Network

IPv4 Prefixes:

IPv4 Peers:

IPv4 Upstreams:

IPv6 Prefixes:

IPv6 Peers:

IPv6 Upstreams:

Contacts

Email Contacts:

noc@caltech.edu

Abuse Contacts:

noc@caltech.edu

Address:

1200 East California Boulevard,

MS 1-10,

Pasadena,

CA,

91125,

IPv4 Prefixes
IPv6 Prefixes

Announced Prefix	Description	Parent Prefix	RIR
131.215.0.0/16	California Institute of Technology	131.215.0.0/16	ARIN
131.215.229.0/24	California Institute of Technology	131.215.0.0/16	ARIN
131.215.230.0/24	California Institute of Technology	131.215.0.0/16	ARIN
131.215.234.0/24	California Institute of Technology	131.215.0.0/16	ARIN
131.215.239.0/24	California Institute of Technology	131.215.0.0/16	ARIN
131.215.240.0/24	California Institute of Technology	131.215.0.0/16	ARIN
131.215.242.0/23	California Institute of Technology	131.215.0.0/16	ARIN
131.215.244.0/23	California Institute of Technology	131.215.0.0/16	ARIN
134.4.0.0/16	California Institute of Technology	134.4.0.0/16	ARIN
192.12.19.0/24	California Institute of Technology	192.12.19.0/24	ARIN
192.31.43.0/24	California Institute of Technology	192.31.43.0/24	ARIN
192.41.208.0/24	California Institute of Technology	192.41.208.0/24	ARIN

Country	Announced Prefix	Description	Valid ROA	Parent Prefix	RIR
	2607:f520::/32	California Institute of Technology		2607:f520::/32	ARIN

IPv4 Peers
IPv6 Peers

ASN	Name	Description
AS2152	CENIC-2152	CENIC
AS13335	CLOUDFLARENET	Cloudflare, Inc.
AS226	LOS-NETTOS-AS	Los Nettos
AS2153	CENIC-2153	CENIC

Country	ASN	Name	Description	IPv4
	AS2152	CENIC-2152	CENIC

IPv4 Upstreams
IPv6 Upstreams

ASN	Name	Description
AS13335	CLOUDFLARENET	Cloudflare, Inc.
AS226	LOS-NETTOS-AS	Los Nettos
AS2152	CENIC-2152	CENIC

IPv4 Upstream Graph

Country	ASN	Name	Description	IPv4
	AS2152	CENIC-2152	CENIC

IPv6 Upstream Graph

#
# 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


OrgTechHandle: CI2-ORG-ARIN
OrgTechName:   Caltech Network Operations Center
OrgTechPhone:  +1-626-395-3500 
OrgTechEmail:  noc@caltech.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName:   Caltech Network Operations Center
OrgAbusePhone:  +1-626-395-3500 
OrgAbuseEmail:  noc@caltech.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName:   Caltech Network Operations Center
RTechPhone:  +1-626-395-3500 
RTechEmail:  noc@caltech.edu
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.
#

Country	IX	Name	IPv4	IPv6	Port Speed