Report for 19209

Name

GMO-BOSTON - Grantham, Mayo, VanOtterloo & Co. LLC, 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.

19209 GMO-BOSTON, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS36086         TELX-LEGACY, US
    AS174           COGENT-174, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
48646 AS19209        ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  GMO-BOSTON, 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       %
35266 AS19209       GMO-BOSTON, US                                     2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  69.147.188.0/24      2914 174 19209         
  192.235.80.0/24      57866 1299 36086 19209   

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

AS19209   2 More Specifics   2 Total Advertisements   GMO-BOSTON, US
    69.147.188.0/24               69.147.160.0/19
    192.235.80.0/24               192.235.64.0/18

Whois Entry

whois: 402603

IANA has recorded AS19209 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19209\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:       19209
             ASName:         GMO-BOSTON
             ASHandle:       AS19209
             RegDate:        2000-12-05
             Updated:        2012-02-24
             Ref:            https://rdap.arin.net/registry/autnum/19209
             
             
             OrgName:        Grantham, Mayo, VanOtterloo & Co. LLC
             OrgId:          GMVCL
             Address:        40 Rowes Wharf
             City:           Boston
             StateProv:      MA
             PostalCode:     02110
             Country:        US
             RegDate:        2000-12-05
             Updated:        2014-11-11
             Ref:            https://rdap.arin.net/registry/entity/GMVCL
             
             
             OrgAbuseHandle: THERI9-ARIN
             OrgAbuseName:   Theriault, Mike 
             OrgAbusePhone:  +1-617-880-8743 
             OrgAbuseEmail:  mike.theriault@gmo.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/THERI9-ARIN
             
             OrgTechHandle: JC1763-ARIN
             OrgTechName:   Cunniff, Jack 
             OrgTechPhone:  +1-617-719-7848 
             OrgTechEmail:  jack_cunniff@gmo.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/JC1763-ARIN
             
             OrgTechHandle: THERI9-ARIN
             OrgTechName:   Theriault, Mike 
             OrgTechPhone:  +1-617-880-8743 
             OrgTechEmail:  mike.theriault@gmo.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/THERI9-ARIN
             
             OrgAbuseHandle: JC1763-ARIN
             OrgAbuseName:   Cunniff, Jack 
             OrgAbusePhone:  +1-617-719-7848 
             OrgAbuseEmail:  jack_cunniff@gmo.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/JC1763-ARIN
             
             OrgNOCHandle: THERI9-ARIN
             OrgNOCName:   Theriault, Mike 
             OrgNOCPhone:  +1-617-880-8743 
             OrgNOCEmail:  mike.theriault@gmo.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/THERI9-ARIN
             
             RTechHandle: JC1763-ARIN
             RTechName:   Cunniff, Jack 
             RTechPhone:  +1-617-719-7848 
             RTechEmail:  jack_cunniff@gmo.com
             RTechRef:    https://rdap.arin.net/registry/entity/JC1763-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.
             #