Report for 25

Name

UCB - University of California at Berkeley, 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.

25 UCB - University of California at Berkeley, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS2152          CENIC-2152 - CENIC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1253  AS25           ORIGIN  Originate:     206080 /14.35  Transit:          0 /0.00  UCB - University of California at Berkeley, 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       %
20318 AS25          UCB - University of California at Berkeley, U     13      1      0     12      1   7.69%


  Prefix               AS Path                              Aggregation Suggestion
  67.21.36.0/24        4777 2516 2152 25      
  128.32.0.0/16        4777 2516 2152 25      
  136.152.0.0/16       4777 2516 2152 25      
  169.229.0.0/16       4777 2516 2152 25      
  169.229.176.0/20     4777 2516 2152 25    - Withdrawn - matching aggregate 169.229.0.0/16 4777 2516 2152 25
  169.236.240.0/21     4777 2516 2152 25      
  192.12.234.0/24      4777 2516 2152 25      
  192.35.209.0/24      4777 2516 2152 25      
  192.150.186.0/23     4777 2516 2152 25      
  192.154.4.0/23       4777 2516 2152 25      
  192.154.6.0/24       4777 2516 2152 25      
  208.68.240.0/22      4777 2516 2152 25      
  209.129.246.0/24     4608 7575 2153 2152 25   

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

AS25   3 More Specifics   13 Total Advertisements   UCB - University of California at Berkeley, US
    169.229.176.0/20              169.229.0.0/16
    169.236.240.0/21              169.236.0.0/15
    209.129.246.0/24              209.129.0.0/16

Whois Entry

whois: 402609

IANA has recorded AS25 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS25\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:       25
             ASName:         UCB
             ASHandle:       AS25
             RegDate:        1984-08-03
             Updated:        2023-12-14
             Comment:        DMCA Designated Agent is policy@berkeley.edu
             Ref:            https://rdap.arin.net/registry/autnum/25
             
             
             OrgName:        University of California at Berkeley
             OrgId:          UCAB-1-Z
             Address:        IST - Telecommunications
             Address:        ATTN Network Services and Operations
             Address:        2850 Telegraph Ave
             Address:        NOTE See Comment for DMCA INFO
             City:           Berkeley
             StateProv:      CA
             PostalCode:     94705
             Country:        US
             RegDate:        2010-01-13
             Updated:        2023-07-20
             Comment:        DMCA Designated Agent is dmca@berkeley.edu
             Ref:            https://rdap.arin.net/registry/entity/UCAB-1-Z
             
             
             OrgTechHandle: UCB-NOC-ARIN
             OrgTechName:   IST Communication and Network Services
             OrgTechPhone:  +1-510-664-9000 
             OrgTechEmail:  noc@berkeley.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/UCB-NOC-ARIN
             
             OrgAbuseHandle: UCBSE-ARIN
             OrgAbuseName:   UCB-SECURIT-ARIN
             OrgAbusePhone:  +1-510-664-9000 
             OrgAbuseEmail:  abuse@security.berkeley.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/UCBSE-ARIN
             
             OrgNOCHandle: UCB-NOC-ARIN
             OrgNOCName:   IST Communication and Network Services
             OrgNOCPhone:  +1-510-664-9000 
             OrgNOCEmail:  noc@berkeley.edu
             OrgNOCRef:    https://rdap.arin.net/registry/entity/UCB-NOC-ARIN
             
             RNOCHandle: UCB-NOC-ARIN
             RNOCName:   IST Communication and Network Services
             RNOCPhone:  +1-510-664-9000 
             RNOCEmail:  noc@berkeley.edu
             RNOCRef:    https://rdap.arin.net/registry/entity/UCB-NOC-ARIN
             
             RTechHandle: UCB-NOC-ARIN
             RTechName:   IST Communication and Network Services
             RTechPhone:  +1-510-664-9000 
             RTechEmail:  noc@berkeley.edu
             RTechRef:    https://rdap.arin.net/registry/entity/UCB-NOC-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.
             #