Report for 19858

Name

GENSLER - M. Arthur Gensler Jr. & Associates, 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 AS6447) 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.

19858 GENSLER, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS6994          FASTMETRICS, US
    AS174           COGENT-174, US
    AS7018          ATT-INTERNET4, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
48688 AS19858        ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  GENSLER, 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       %
35496 AS19858       GENSLER, US                                        2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  64.239.72.0/24       49788 174 19858        
  64.239.73.0/24       2497 174 19858         

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

AS19858   2 More Specifics   2 Total Advertisements   GENSLER, US
    138.208.5.0/24                138.208.0.0/16
    138.208.135.0/24              138.208.0.0/16
    138.208.6.0/24                138.208.0.0/16

Prefixes added and withdrawn by this origin AS in the past 7 days.

    - 138.208.6.0/24              Withdrawn

Whois Entry

whois: 402603

IANA has recorded AS19858 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19858\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:       19858
             ASName:         GENSLER
             ASHandle:       AS19858
             RegDate:        2001-02-21
             Updated:        2025-06-30
             Ref:            https://rdap.arin.net/registry/autnum/19858
             
             
             OrgName:        M. Arthur Gensler Jr. & Associates, Inc.
             OrgId:          GAA
             Address:        2101 Webster St.
             Address:        Suite 2000
             City:           Oakland
             StateProv:      CA
             PostalCode:     94612
             Country:        US
             RegDate:        1990-05-29
             Updated:        2025-06-30
             Ref:            https://rdap.arin.net/registry/entity/GAA
             
             
             OrgAbuseHandle: BALTE2-ARIN
             OrgAbuseName:   Baltera, Matthew 
             OrgAbusePhone:  +1-832-496-8696 
             OrgAbuseEmail:  matthew_baltera@gensler.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/BALTE2-ARIN
             
             OrgNOCHandle: NDE44-ARIN
             OrgNOCName:   Eigsti, Nathan Daniel
             OrgNOCPhone:  +1-510-625-7449 
             OrgNOCEmail:  nathan_eigsti@gensler.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/NDE44-ARIN
             
             OrgTechHandle: NDE44-ARIN
             OrgTechName:   Eigsti, Nathan Daniel
             OrgTechPhone:  +1-510-625-7449 
             OrgTechEmail:  nathan_eigsti@gensler.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/NDE44-ARIN
             
             OrgTechHandle: HEROL-ARIN
             OrgTechName:   HEROLD, LORI 
             OrgTechPhone:  +1-415-836-4265 
             OrgTechEmail:  lori_herold@gensler.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/HEROL-ARIN
             
             OrgRoutingHandle: BALTE2-ARIN
             OrgRoutingName:   Baltera, Matthew 
             OrgRoutingPhone:  +1-832-496-8696 
             OrgRoutingEmail:  matthew_baltera@gensler.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/BALTE2-ARIN
             
             OrgTechHandle: LAB21-ARIN
             OrgTechName:   Bedrick, Lauren  Ashley
             OrgTechPhone:  +1-702-560-5616 
             OrgTechEmail:  arin2@brandergroup.net
             OrgTechRef:    https://rdap.arin.net/registry/entity/LAB21-ARIN
             
             OrgTechHandle: RANEY3-ARIN
             OrgTechName:   RANEY, MAUREEN 
             OrgTechPhone:  +1-303-893-7129 
             OrgTechEmail:  maureen_raney@gensler.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/RANEY3-ARIN
             
             OrgRoutingHandle: NDE44-ARIN
             OrgRoutingName:   Eigsti, Nathan Daniel
             OrgRoutingPhone:  +1-510-625-7449 
             OrgRoutingEmail:  nathan_eigsti@gensler.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/NDE44-ARIN
             
             OrgNOCHandle: BALTE2-ARIN
             OrgNOCName:   Baltera, Matthew 
             OrgNOCPhone:  +1-832-496-8696 
             OrgNOCEmail:  matthew_baltera@gensler.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/BALTE2-ARIN
             
             OrgAbuseHandle: NDE44-ARIN
             OrgAbuseName:   Eigsti, Nathan Daniel
             OrgAbusePhone:  +1-510-625-7449 
             OrgAbuseEmail:  nathan_eigsti@gensler.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NDE44-ARIN
             
             OrgTechHandle: BALTE2-ARIN
             OrgTechName:   Baltera, Matthew 
             OrgTechPhone:  +1-832-496-8696 
             OrgTechEmail:  matthew_baltera@gensler.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/BALTE2-ARIN
             
             RTechHandle: BALTE2-ARIN
             RTechName:   Baltera, Matthew 
             RTechPhone:  +1-832-496-8696 
             RTechEmail:  matthew_baltera@gensler.com
             RTechRef:    https://rdap.arin.net/registry/entity/BALTE2-ARIN
             
             RAbuseHandle: BALTE2-ARIN
             RAbuseName:   Baltera, Matthew 
             RAbusePhone:  +1-832-496-8696 
             RAbuseEmail:  matthew_baltera@gensler.com
             RAbuseRef:    https://rdap.arin.net/registry/entity/BALTE2-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.
             #