Report for 2153

Name

CENIC-2153 - CENIC, US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

2153 CENIC-2153 - CENIC, US

  Adjacency:    25  Upstream:     3  Downstream:    22
  Upstream Adjacent AS list
    AS2907          SINET-AS Research Organization of Information and Systems, National Institute of Informatics, JP
    AS11537         INTERNET2-RESEARCH-EDU - Internet2, US
    AS7575          AARNET-AS-AP Australian Academic and Research Network AARNet, AU
  Downstream Adjacent AS list
    AS131           UCSB-NET-AS - University of California, Santa Barbara, US
    AS2037          CSUFRESNO - California State University at Fresno, US
    AS31            CIT - California Institute of Technology, US
    AS396310        SDSU-SCIENCE-NETWORK - San Diego State University, US
    AS40498         ABQG - New Mexico Lambda Rail, Inc., US
    AS396465        SACSTATE - California State University, Sacramento, US
    AS299           UCINET-AS - University of California, Irvine, US
    AS52            UCLA - University of California, Los Angeles, US
    AS46985         HPWREN - The Regents of the University of California - University of California, San Diego., US
    AS5739          UCSC - University of California, Santa Cruz, US
    AS9             CMU-ROUTER - Carnegie Mellon University, US
    AS7377          UCSD - University of California, San Diego, US
    AS257           DNIC-AS-00257 - Navy Network Information Center NNIC, US
    AS22323         UNIVERSITY-OF-CALIFORNIA-MERCED - University of California, Merced, US
    AS195           SDSC-AS - San Diego Supercomputer Center, US
    AS32361         ULTRALIGHT - UltraLight, US
    AS5653          UCSF - University of California San Francisco, US
    AS6106          UCR-EDU - University of California, Riverside, US
    AS567           ASN-LNET-AS - Los Nettos, US
    AS6192          UCDAVIS-CORE - University of California, Davis, US
    AS26397         OPTIPUTER - The Regents of the University of California - University of California, San Diego., US
    AS2152          CENIC-2152 - CENIC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
19520 AS2153         ORG+TRN Originate:       3072 /20.42  Transit:     905600 /12.21 CENIC-2153 - CENIC, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
19981 AS2153        CENIC-2153 - CENIC, US                            10      2      1      9      1  10.00%


  Prefix               AS Path                              Aggregation Suggestion
  130.150.12.0/23      4608 7575 2153         
  136.168.238.0/24     4608 7575 2153         
  137.150.137.0/24     4608 7575 2153         
  137.164.17.0/24      4608 7575 2153         
  137.164.25.0/24      4608 7575 2153         
  137.164.26.0/23      4608 7575 2153         
  137.164.28.0/24      4608 7575 2153         
  205.154.51.0/24      4608 7575 2153         
  209.129.60.0/23      4608 7575 2153       + Announce - aggregate of 209.129.60.0/24 (4608 7575 2153) and 209.129.61.0/24 (4608 7575 2153)
  209.129.60.0/24      4608 7575 2153       - Withdrawn - aggregated with 209.129.61.0/24 (4608 7575 2153)
  209.129.61.0/24      4608 7575 2153       - Withdrawn - aggregated with 209.129.60.0/24 (4608 7575 2153)

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS2153   10 More Specifics   10 Total Advertisements   CENIC-2153 - CENIC, US
    130.150.12.0/23               130.150.0.0/16
    136.168.238.0/24              136.168.0.0/16
    137.150.137.0/24              137.150.0.0/16
    137.164.17.0/24               137.164.0.0/16
    137.164.25.0/24               137.164.0.0/16
    137.164.26.0/23               137.164.0.0/16
    137.164.28.0/24               137.164.0.0/16
    205.154.51.0/24               205.154.0.0/16
    209.129.60.0/24               209.129.0.0/16
    209.129.61.0/24               209.129.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS2153 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS2153\n             
             #
             # 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
             
             
             OrgAbuseHandle: ABUSE711-ARIN
             OrgAbuseName:   CENIC Abuse
             OrgAbusePhone:  +1-714-220-3494 
             OrgAbuseEmail:  abuse@cenic.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE711-ARIN
             
             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
             
             
             #
             # 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.
             #