Report for 5723

Name

JHU - Johns Hopkins University, 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.

5723 JHU - Johns Hopkins University, US

  Adjacency:     4  Upstream:     4  Downstream:     0
  Upstream Adjacent AS list
    AS11096         FLORIDANET - FloridaNet, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS396450        INTERNET2-2 - Internet2, US
    AS6939          HURRICANE - Hurricane Electric LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1748  AS5723         ORIGIN  Originate:     136192 /14.94  Transit:          0 /0.00  JHU - Johns Hopkins University, 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       %
30984 AS5723        JHU - Johns Hopkins University, US                 9      0      0      9      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  128.220.0.0/16       4608 6939 5723         
  128.220.122.0/24     4608 7575 1299 198949 396450 5723   
  162.129.0.0/16       4608 6939 5723         
  192.12.13.0/24       4608 6939 5723         
  192.12.14.0/24       4608 6939 5723         
  198.57.32.0/21       4608 6939 11096 5723   
  198.57.39.0/24       4608 6939 5723 5723 5723   
  198.57.40.0/22       4608 6939 11096 5723   
  204.124.184.0/22     4608 6939 5723         

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

AS5723   2 More Specifics   9 Total Advertisements   JHU - Johns Hopkins University, US
    128.220.122.0/24              128.220.0.0/16
    198.57.39.0/24                198.57.32.0/21

Prefixes added and withdrawn by this origin AS in the past 7 days.

    + 128.220.122.0/24            Announced

Whois Entry

whois: 402599

IANA has recorded AS5723 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS5723\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:       5723
             ASName:         JHU
             ASHandle:       AS5723
             RegDate:        1995-09-06
             Updated:        2020-09-08
             Ref:            https://rdap.arin.net/registry/autnum/5723
             
             
             OrgName:        Johns Hopkins University
             OrgId:          JHU-Z
             Address:        Hopkins Information Technology Services
             Address:        3400 North Charles Street
             Address:        Garland Hall, Suite 020
             City:           Baltimore
             StateProv:      MD
             PostalCode:     21218
             Country:        US
             RegDate:        2020-08-28
             Updated:        2020-08-28
             Ref:            https://rdap.arin.net/registry/entity/JHU-Z
             
             
             OrgAbuseHandle: DZ24-ARIN
             OrgAbuseName:   Network Operation Center
             OrgAbusePhone:  +1-410-516-4357 
             OrgAbuseEmail:  noc@jhu.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DZ24-ARIN
             
             OrgTechHandle: DZ24-ARIN
             OrgTechName:   Network Operation Center
             OrgTechPhone:  +1-410-516-4357 
             OrgTechEmail:  noc@jhu.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/DZ24-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.
             #