Report for 5724

Name

UMASSMED - University of Massachusetts Medical School, 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.

5724 UMASSMED - University of Massachusetts Medical School, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS10578         GIGAPOP-NE - Harvard University, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
3126  AS5724         ORIGIN  Originate:      68096 /15.94  Transit:          0 /0.00  UMASSMED - University of Massachusetts Medical School, 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       %
12030 AS5724        UMASSMED - University of Massachusetts Medica      4      3      0      1      3  75.00%


  Prefix               AS Path                              Aggregation Suggestion
  146.189.0.0/16       4608 7575 11537 10578 5724   
  146.189.25.0/24      4608 7575 11537 10578 5724 - Withdrawn - matching aggregate 146.189.0.0/16 4608 7575 11537 10578 5724
  146.189.26.0/24      4608 7575 11537 10578 5724 - Withdrawn - matching aggregate 146.189.0.0/16 4608 7575 11537 10578 5724
  146.189.128.0/21     4608 7575 11537 10578 5724 - Withdrawn - matching aggregate 146.189.0.0/16 4608 7575 11537 10578 5724

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

AS5724   3 More Specifics   4 Total Advertisements   UMASSMED - University of Massachusetts Medical School, US
    146.189.25.0/24               146.189.0.0/16
    146.189.26.0/24               146.189.0.0/16
    146.189.128.0/21              146.189.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS5724 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS5724\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:       5724
             ASName:         UMASSMED
             ASHandle:       AS5724
             RegDate:        1995-09-06
             Updated:        2023-07-01
             Comment:        http://www.umassmed.edu
             Ref:            https://rdap.arin.net/registry/autnum/5724
             
             
             OrgName:        University of Massachusetts Medical School
             OrgId:          UMMC-1-Z
             Address:        55 Lake Avenue North
             City:           Worcester
             StateProv:      MA
             PostalCode:     01655
             Country:        US
             RegDate:        2023-06-20
             Updated:        2023-06-20
             Ref:            https://rdap.arin.net/registry/entity/UMMC-1-Z
             
             
             OrgNOCHandle: HOSTE28-ARIN
             OrgNOCName:   Hosted Services
             OrgNOCPhone:  +1-508-612-1138 
             OrgNOCEmail:  HostedServices@umassmed.edu
             OrgNOCRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN
             
             OrgTechHandle: HOSTE28-ARIN
             OrgTechName:   Hosted Services
             OrgTechPhone:  +1-508-612-1138 
             OrgTechEmail:  HostedServices@umassmed.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN
             
             OrgAbuseHandle: HOSTE28-ARIN
             OrgAbuseName:   Hosted Services
             OrgAbusePhone:  +1-508-612-1138 
             OrgAbuseEmail:  HostedServices@umassmed.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN
             
             RTechHandle: HOSTE28-ARIN
             RTechName:   Hosted Services
             RTechPhone:  +1-508-612-1138 
             RTechEmail:  HostedServices@umassmed.edu
             RTechRef:    https://rdap.arin.net/registry/entity/HOSTE28-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.
             #