Report for 31

Name

CIT - California Institute of Technology, 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.

31 CIT - California Institute of Technology, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS2153          CENIC-2153 - CENIC, US
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US
    AS2152          CENIC-2152 - CENIC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1783  AS31           ORIGIN  Originate:     134144 /14.97  Transit:          0 /0.00  CIT - California Institute of Technology, 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       %
29974 AS31          CIT - California Institute of Technology, US      12      0      0     12      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  131.215.0.0/16       4608 7575 2153 31      
  131.215.229.0/24     4608 13335 31          
  131.215.230.0/24     4608 13335 31          
  131.215.234.0/24     4608 13335 31          
  131.215.239.0/24     4608 13335 31          
  131.215.240.0/24     4608 13335 31          
  131.215.242.0/23     4608 13335 31          
  131.215.244.0/23     4608 13335 31          
  134.4.0.0/16         4608 7575 2153 31      
  192.12.19.0/24       4608 7575 2153 31      
  192.31.43.0/24       4608 7575 2153 31      
  192.41.208.0/24      4608 7575 2153 31      

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

AS31   7 More Specifics   12 Total Advertisements   CIT - California Institute of Technology, US
    131.215.229.0/24              131.215.0.0/16
    131.215.230.0/24              131.215.0.0/16
    131.215.234.0/24              131.215.0.0/16
    131.215.239.0/24              131.215.0.0/16
    131.215.240.0/24              131.215.0.0/16
    131.215.242.0/23              131.215.0.0/16
    131.215.244.0/23              131.215.0.0/16

Whois Entry

whois: 402591

IANA has recorded AS31 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS31\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:       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 1997-2026, American Registry for Internet Numbers, Ltd.
             #