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	Prefix	Description
	146.121.20.0/24	NatWest Markets Securities Inc.
	146.121.21.0/24	NatWest Markets Securities Inc.
	146.121.23.0/24	NatWest Markets Securities Inc.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS54004	Cablevision Lightpath LLC	✔	✘
	AS46887	Zayo Bandwidth	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS54004	Cablevision Lightpath LLC	✔	✘
	AS46887	Zayo Bandwidth	✔	✘

ASHandle:       AS14864
OrgID:          GCM-30
ASName:         GREENWICH
ASNumber:       14864
RegDate:        2000-02-16
Updated:        2025-03-02
TechHandle:     FUSCO11-ARIN
AbuseHandle:    FUSCO11-ARIN
NOCHandle:      FUSCO11-ARIN
Source:         ARIN



OrgID:          GCM-30
OrgName:        NatWest Markets Securities Inc.
CanAllocate:    
Street:         600 Washington Blvd
City:           Stamford
State/Prov:     CT
Country:        US
PostalCode:     06901
RegDate:        2000-02-16
Updated:        2025-02-28
OrgAdminHandle: FUSCO11-ARIN
OrgTechHandle:  FUSCO11-ARIN
OrgTechHandle:  ITCOM6-ARIN
OrgAbuseHandle: FUSCO11-ARIN
Source:         ARIN





OrgAdminHandle:       FUSCO11-ARIN
OrgAdminName:         Richard Fusco
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        FUSCO11-ARIN
OrgTechName:          Richard Fusco
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        ITCOM6-ARIN
OrgTechName:           itcomm@natwestmarkets
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       FUSCO11-ARIN
OrgAbuseName:         Richard Fusco
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           FUSCO11-ARIN
TechName:             Richard Fusco
# Email removed, Log into bgp.tools to see whois emails


AbuseHandle:          FUSCO11-ARIN
AbuseName:            Richard Fusco
# Email removed, Log into bgp.tools to see whois emails


NOCHandle:            FUSCO11-ARIN
NOCName:              Richard Fusco
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-06-14T03:26:20Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as-xo-b	59971
ARIN	as6128:as-customers	781
LEVEL3	as-level3-origins-na	0
RADB	as12025:as-customers	154
RADB	as-ccf-test	1461
RADB	as-cv	189
RADB	as-ccf	1539