AS19209 Grantham, Mayo, VanOtterloo & Co. LLC 🇺🇸 US

Announcing 2 prefixes, seen at the RIS collectors.

IPv4 prefixes

512 (2 × /24)

IPv6 prefixes

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS19209
Name: Grantham, Mayo, VanOtterloo & Co. LLC
Organisation: Grantham, Mayo, VanOtterloo & Co. LLC
Country: 🇺🇸 US
RIR: ARIN
Allocated: 2000-12-05

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

1 valid (50.0%) 0 invalid (0.0%) 1 no ROA (50.0%)

Whois

Fetched from whois.arin.net

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:        53 State Street
City:           Boston
StateProv:      MA
PostalCode:     02109
Country:        US
RegDate:        2000-12-05
Updated:        2026-08-31
Ref:            https://rdap.arin.net/registry/entity/GMVCL

OrgTechHandle: ROYTE1-ARIN
OrgTechName:   Roy, Ted
OrgTechPhone:  +1-617-880-8810
OrgTechEmail:  ted.roy@gmo.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ROYTE1-ARIN

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

OrgAbuseHandle: ROYTE1-ARIN
OrgAbuseName:   Roy, Ted
OrgAbusePhone:  +1-617-880-8810
OrgAbuseEmail:  ted.roy@gmo.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ROYTE1-ARIN

OrgNOCHandle: ROYTE1-ARIN
OrgNOCName:   Roy, Ted
OrgNOCPhone:  +1-617-880-8810
OrgNOCEmail:  ted.roy@gmo.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ROYTE1-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

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

RTechHandle: JC1763-ARIN
RTechName:   Cunniff, Jack
RTechPhone:  +1-617-880-8765
RTechEmail:  jack_cunniff@gmo.com
RTechRef:    https://rdap.arin.net/registry/entity/JC1763-ARIN