Report for 21643

Name

MWU-ASN - Midwestern 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 AS4637) 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.

21643 MBPNY - Mayer, Brown & Platt

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS7018    ATT-INTERNET4 - AT&T WorldNet Services

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
12334 AS21643  ORIGIN  Originate:       2048 /21.00  Transit:          0 /0.00  MBPNY - Mayer, Brown & Platt

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       %
13920 AS21643 MBPNY - Mayer, Brown & Platt                  2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  143.58.36.0/22       4637 3491 3561 7018 21643   
  143.58.40.0/22       4637 3491 3561 7018 21643   

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

AS21643   2 More Specifics   2 Total Advertisements   MBPNY - Mayer, Brown & Platt
    143.58.36.0/22                143.58.0.0/16
    143.58.40.0/22                143.58.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS21643 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21643\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:       21643
             ASName:         MWU-ASN
             ASHandle:       AS21643
             RegDate:        2014-10-14
             Updated:        2014-10-14
             Ref:            https://rdap.arin.net/registry/autnum/21643
             
             
             OrgName:        Midwestern University
             OrgId:          MIDWES-1
             Address:        555 31st St.
             City:           Downers Grove
             StateProv:      IL
             PostalCode:     60515
             Country:        US
             RegDate:        1996-01-24
             Updated:        2011-09-24
             Ref:            https://rdap.arin.net/registry/entity/MIDWES-1
             
             
             OrgAbuseHandle: JGJ12-ARIN
             OrgAbuseName:   Jacobson, James G.
             OrgAbusePhone:  +1-630-515-7351 
             OrgAbuseEmail:  jjacob@midwestern.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/JGJ12-ARIN
             
             OrgTechHandle: JGJ12-ARIN
             OrgTechName:   Jacobson, James G.
             OrgTechPhone:  +1-630-515-7351 
             OrgTechEmail:  jjacob@midwestern.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/JGJ12-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.
             #