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 AS6447) 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, US

  Adjacency:    49  Upstream:     6  Downstream:    43
  Upstream Adjacent AS list
    AS2152          CENIC-2152, US
    AS293           ESNET, US
    AS195           SDSC-AS, US
    AS11537         INTERNET2-RESEARCH-EDU, US
    AS2907          SINET-AS Research Organization of Information and Systems, National Institute of Informatics, JP
    AS7575          AARNET-AS-AP Australian Academic and Research Network AARNet, AU
  Downstream Adjacent AS list
    AS101           WASH-NSF-AS, US
    AS11096         FLORIDANET, US
    AS17579         KREONET2-AS-KR KISTI, KR
    AS28569         Corporacion Universitaria para el Desarrollo de Internet, A.C., MX
    AS24            AS24, US
    AS2907          SINET-AS Research Organization of Information and Systems, National Institute of Informatics, JP
    AS38022         REANNZ-NZ-AP REANNZ National Research and Education Network, NZ
    AS6509          CANARIE-NTN, CA
    AS293           ESNET, US
    AS7539          TWAREN-TW National Center for High-performance Computing, TW
    AS7575          AARNET-AS-AP Australian Academic and Research Network AARNet, AU
    AS8075          MICROSOFT-CORP-MSN-AS-BLOCK, US
    AS668           DNIC-AS-00668, US
    AS11537         INTERNET2-RESEARCH-EDU, US
    AS6360          UNIVHAWAII, US
    AS131           UCSB-NET-AS, US
    AS16            LBL, US
    AS2037          CSUFRESNO, US
    AS257           DNIC-AS-00257, US
    AS22323         UNIVERSITY-OF-CALIFORNIA-MERCED, US
    AS26488         SCU-ASN, US
    AS31            CIT, US
    AS299           UCINET-AS, US
    AS32361         ULTRALIGHT, US
    AS396310        SDSU-SCIENCE-NETWORK, US
    AS46357         CALPOLY-NETLAB, US
    AS396465        SACSTATE, US
    AS32            STANFORD, US
    AS46985         HPWREN, US
    AS52            UCLA, US
    AS47            USC-AS, US
    AS26397         OPTIPUTER, US
    AS6106          UCR-EDU, US
    AS6192          UCDAVIS-CORE, US
    AS5739          UCSC, US
    AS567           ASN-LNET-AS, US
    AS9             CMU-ROUTER, US
    AS7960          CALPOLY-NET-ENS, US
    AS7377          UCSD, US
    AS5653          UCSF, US
    AS40498         ABQG, US
    AS195           SDSC-AS, US
    AS2152          CENIC-2152, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
19686 AS2153         ORG+TRN Originate:       3136 /20.39  Transit:     823296 /12.35 CENIC-2153, 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       %
20430 AS2153        CENIC-2153, US                                    11      2      1     10      1   9.09%


  Prefix               AS Path                              Aggregation Suggestion
  130.150.12.0/23      293 2153               
  136.168.238.0/24     11537 2153             
  137.150.137.0/24     293 2153               
  137.164.17.0/24      293 2153               
  137.164.25.0/24      293 2153               
  137.164.26.0/23      293 2153               
  137.164.28.0/24      293 2153               
  198.188.2.0/26       11537 2153             
  205.154.51.0/24      293 2153               
  209.129.60.0/23      11537 2153           + Announce - aggregate of 209.129.60.0/24 (11537 2153) and 209.129.61.0/24 (11537 2153)
  209.129.60.0/24      11537 2153           - Withdrawn - aggregated with 209.129.61.0/24 (11537 2153)
  209.129.61.0/24      11537 2153           - Withdrawn - aggregated with 209.129.60.0/24 (11537 2153)

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

AS2153   4 More Specifics   4 Total Advertisements   CSUNET-NE, US
    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
    146.244.204.0/22              146.244.0.0/16

Prefixes added and withdrawn by this origin AS in the past 7 days.

    - 146.244.204.0/22            Withdrawn

Whois Entry

whois: 402609

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
             
             
             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.
             #