Report for 54121

Name

DMSAS - David M. Schwarz Architects, Inc., 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.

54121 DMSAS - David M. Schwarz Architects, Inc., US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
64381 AS54121        ORIGIN  Originate:        256 /24.00  Transit:          0 /0.00  DMSAS - David M. Schwarz Architects, Inc., 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       %
48815 AS54121       DMSAS - David M. Schwarz Architects, Inc., US      1      0      0      1      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  205.157.136.0/24     4777 2497 3356 54121   

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

AS54121   1 More Specifics   1 Total Advertisements   DMSAS - David M. Schwarz Architects, Inc., US
    205.157.136.0/24              205.157.128.0/20

Whois Entry

whois: 402332

IANA has recorded AS54121 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS54121\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:       54121
             ASName:         DMSAS
             ASHandle:       AS54121
             RegDate:        2011-10-07
             Updated:        2012-03-02
             Comment:        http://www.dmsas.com
             Ref:            https://rdap.arin.net/registry/autnum/54121
             
             
             OrgName:        David M. Schwarz Architects, Inc.
             OrgId:          DMSA
             Address:        1707 L Street, NW
             Address:        suite 400
             City:           Washington
             StateProv:      DC
             PostalCode:     20036
             Country:        US
             RegDate:        2011-10-03
             Updated:        2011-10-03
             Comment:        http://www.dmsas.com
             Ref:            https://rdap.arin.net/registry/entity/DMSA
             
             
             OrgAbuseHandle: HOUSE11-ARIN
             OrgAbuseName:   Houseknecht, Ted 
             OrgAbusePhone:  +1-202-862-0777 
             OrgAbuseEmail:  ted@dmsas.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/HOUSE11-ARIN
             
             OrgTechHandle: HOUSE11-ARIN
             OrgTechName:   Houseknecht, Ted 
             OrgTechPhone:  +1-202-862-0777 
             OrgTechEmail:  ted@dmsas.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/HOUSE11-ARIN
             
             OrgNOCHandle: HOUSE11-ARIN
             OrgNOCName:   Houseknecht, Ted 
             OrgNOCPhone:  +1-202-862-0777 
             OrgNOCEmail:  ted@dmsas.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/HOUSE11-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.
             #