ASN AS2153 is an Autonomous System Number used to identify a network for BGP internet routing.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

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AS2153 CENIC | IPGeolocation.io

CENIC cenic.org

US 13 Routes

AS Data

AS2153

AS2153 – CENIC

AS Number	2153
AS Name	CENIC-2153
Organization	CENIC (cenic)
Country	US
Website	cenic.org
Number of IPv4 Routes	11
Number of IPv6 Routes	2
ASN type	ISP
Registry	ARIN
Date Allocated	2024-07-08

ASN Intelligence API for production workflows

Use ASN data for AS2153 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
130.150.12.0/23	AS2153	CENIC	California State University, Office of the Chancellor	512
209.129.61.0/24	AS2153	CENIC	CENIC	256
137.164.25.0/24	AS2153	CENIC	CENIC	256
205.154.51.0/24	AS2153	CENIC	CENIC	256
137.164.26.0/23	AS2153	CENIC	CENIC	512
2607:f380:4::/48	AS2153	CENIC	CENIC	~1×10²⁴
209.129.60.0/24	AS2153	CENIC	CENIC	256
136.168.238.0/24	AS2153	CENIC	California State University Bakersfield	256
137.164.28.0/24	AS2153	CENIC	CENIC	256
137.150.137.0/24	AS2153	CENIC	California State Polytechnic University, Humboldt	256
198.188.2.0/26	AS2153	CENIC	Ventura, CSU Northridge	64
137.164.17.0/24	AS2153	CENIC	CENIC	256
2001:468:e00::/40	AS2153	CENIC	CENIC	~309×10²⁴

Raw Whois Response

#
# 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 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       2153
ASName:         CENIC-2153
ASHandle:       AS2153
RegDate:        2024-07-08
Updated:        2024-07-08
Ref:            https://rdap.arin.net/registry/autnum/2153


OrgName:        CENIC
OrgId:          CENIC
Address:        5757 Plaza Drive, Suite 205
City:           Cypress
StateProv:      CA
PostalCode:     90630-5029
Country:        US
RegDate:        1998-08-18
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/CENIC


OrgTechHandle: OPERA63-ARIN
OrgTechName:   Admin Domain
OrgTechPhone:  +1-714-220-3494 
OrgTechEmail:  core-ext@lists.cenic.org
OrgTechRef:    https://rdap.arin.net/registry/entity/OPERA63-ARIN

OrgAbuseHandle: ABUSE711-ARIN
OrgAbuseName:   CENIC Abuse
OrgAbusePhone:  +1-714-220-3494 
OrgAbuseEmail:  abuse@cenic.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE711-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 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "2153",
    "as_handle" : "AS2153",
    "as_name" : "CENIC-2153",
    "tech_contacts" : [ "OPERA63-ARIN" ],
    "abuse_contacts" : [ "ABUSE711-ARIN" ],
    "date_created" : "2024-07-08",
    "date_updated" : "2024-07-08",
    "source" : "https://rdap.arin.net/registry/autnum/2153"
  } ],
  "organization" : {
    "handle" : "CENIC",
    "name" : "CENIC",
    "address" : [ "5757 Plaza Drive, Suite 205", "Cypress", "CA", "90630-5029", "US" ],
    "street" : "Plaza Drive",
    "city" : "Cypress",
    "state" : "CA",
    "zip_code" : "90630-5029",
    "country" : [ "US" ],
    "date_created" : "1998-08-18",
    "date_updated" : "2024-11-25",
    "source" : "https://rdap.arin.net/registry/entity/CENIC",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "OPERA63-ARIN",
    "name" : "Admin Domain",
    "email" : [ "core-ext@lists.cenic.org" ],
    "phone" : [ "+1-714-220-3494" ],
    "source" : "https://rdap.arin.net/registry/entity/OPERA63-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ABUSE711-ARIN",
    "name" : "CENIC Abuse",
    "email" : [ "abuse@cenic.org" ],
    "phone" : [ "+1-714-220-3494" ],
    "source" : "https://rdap.arin.net/registry/entity/ABUSE711-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS299	University of California, Irvine	US
AS26488	Santa Clara University	US
AS31	California Institute of Technology	US
AS26397	The Regents of the University of California - University of California, San Diego.	US
AS668	United States Department of Defense (DoD)	US
AS101	University of Washington	US
AS5653	University of California San Francisco	US
AS40498	New Mexico Lambda Rail, Inc.	US
AS2907	Research Organization of Information and Systems, National Institute of Informatics	JP
AS32	Stanford University	US
AS26397	The Regents of the University of California University of California, San Diego.	US
AS396310	San Diego State University	US
AS32361	UltraLight	US
AS195	San Diego Supercomputer Center	US
AS293	ESnet	US
AS6509	CANARIE Inc	CA
AS5739	University of California, Santa Cruz	US
AS14041	University Corporation for Atmospheric Research	US
AS52	University of California, Los Angeles	US
AS46985	The Regents of the University of California University of California, San Diego.	US
AS24	National Aeronautics and Space Administration	US
AS46985	The Regents of the University of California - University of California, San Diego.	US
AS46357	California Polytechnic State University	US
AS257	Navy Network Information Center (NNIC)	US
AS17579	KISTI	KR
AS22323	University of California, Merced	US
AS396465	California State University, Sacramento	US
AS6192	University of California, Davis	US
AS11537	Internet2	US
AS2037	California State University at Fresno	US
AS47	University of Southern California	US
AS7960	California Polytechnic State University	US
AS7575	Australian Academic and Research Network (AARNet)	AU
AS16	Lawrence Berkeley National Laboratory	US
AS11096	FloridaNet	US
AS9	Carnegie Mellon University	US
AS8075	Microsoft Corporation	US
AS7377	University of California, San Diego	US
AS131	University of California, Santa Barbara	US
AS7575	Australian Academic and Research Network	AU
AS6106	University of California, Riverside	US
AS257	Navy Network Information Center NNIC	US
AS6360	University of Hawaii	US
AS567	Los Nettos	US
AS2152	CENIC	US
AS38022	REANNZ National Research and Education Network	NZ
AS7539	National Center for High-performance Computing	TW

Upstreams

AS Number	Description	Country
AS195	San Diego Supercomputer Center	US
AS293	ESnet	US
AS7575	Australian Academic and Research Network	AU
AS11537	Internet2	US
AS2152	CENIC	US
AS38022	REANNZ National Research and Education Network	NZ
AS2907	Research Organization of Information and Systems, National Institute of Informatics	JP

Downstreams

AS Number	Description	Country
AS299	University of California, Irvine	US
AS26488	Santa Clara University	US
AS31	California Institute of Technology	US
AS5653	University of California San Francisco	US
AS40498	New Mexico Lambda Rail, Inc.	US
AS32	Stanford University	US
AS26397	The Regents of the University of California University of California, San Diego.	US
AS396310	San Diego State University	US
AS32361	UltraLight	US
AS195	San Diego Supercomputer Center	US
AS5739	University of California, Santa Cruz	US
AS14041	University Corporation for Atmospheric Research	US
AS52	University of California, Los Angeles	US
AS46985	The Regents of the University of California University of California, San Diego.	US
AS24	National Aeronautics and Space Administration	US
AS46357	California Polytechnic State University	US
AS22323	University of California, Merced	US
AS396465	California State University, Sacramento	US
AS6192	University of California, Davis	US
AS2037	California State University at Fresno	US
AS47	University of Southern California	US
AS7960	California Polytechnic State University	US
AS16	Lawrence Berkeley National Laboratory	US
AS9	Carnegie Mellon University	US
AS7377	University of California, San Diego	US
AS131	University of California, Santa Barbara	US
AS6106	University of California, Riverside	US
AS257	Navy Network Information Center NNIC	US
AS6360	University of Hawaii	US
AS567	Los Nettos	US
AS2152	CENIC	US

Contacts

Email Contacts

core-ext@lists.cenic.org

Abuse Contacts

abuse@cenic.org

Legacy Routes

132.241.61.0/24

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