ASN AS14864 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS14864?

AS14864 is listed under NatWest Markets Securities Inc..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS14864 NatWest Markets Securities Inc.

ASN Lookup Tool

NatWest Markets Securities Inc. natwestmarkets

US 3 Routes

AS Data

AS14864

AS14864 – NatWest Markets Securities Inc.

AS Number	14864
AS Name	GREENWICH
Organization	NatWest Markets Securities Inc.(gcm-30)
Country	US
Website	natwestmarkets
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2000-02-16

ASN Intelligence API for production workflows

Use ASN data for AS14864 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
146.121.23.0/24	AS14864	NatWest Markets Securities Inc.	NatWest Markets Securities Inc.	256
146.121.21.0/24	AS14864	NatWest Markets Securities Inc.	NatWest Markets Securities Inc.	256
146.121.20.0/24	AS14864	NatWest Markets Securities Inc.	NatWest Markets Securities Inc.	256

Raw Whois Response

#
# 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:       14864
ASName:         GREENWICH
ASHandle:       AS14864
RegDate:        2000-02-16
Updated:        2025-03-02    
Ref:            https://rdap.arin.net/registry/autnum/14864


OrgName:        NatWest Markets Securities Inc.
OrgId:          GCM-30
Address:        600 Washington Blvd
City:           Stamford
StateProv:      CT
PostalCode:     06901
Country:        US
RegDate:        2000-02-16
Updated:        2025-02-28
Ref:            https://rdap.arin.net/registry/entity/GCM-30


OrgTechHandle: FUSCO11-ARIN
OrgTechName:   Fusco, Richard 
OrgTechPhone:  +1-203-897-6085 
OrgTechEmail:  richard.fusco@natwestmarkets.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FUSCO11-ARIN

OrgAbuseHandle: FUSCO11-ARIN
OrgAbuseName:   Fusco, Richard 
OrgAbusePhone:  +1-203-897-6085 
OrgAbuseEmail:  richard.fusco@natwestmarkets.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/FUSCO11-ARIN

OrgTechHandle: ITCOM6-ARIN
OrgTechName:   itcomm@natwestmarkets
OrgTechPhone:  +1-203-897-6085 
OrgTechEmail:  itcomm@natwestmarkets.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ITCOM6-ARIN

RTechHandle: FUSCO11-ARIN
RTechName:   Fusco, Richard 
RTechPhone:  +1-203-897-6085 
RTechEmail:  richard.fusco@natwestmarkets.com
RTechRef:    https://rdap.arin.net/registry/entity/FUSCO11-ARIN

RAbuseHandle: FUSCO11-ARIN
RAbuseName:   Fusco, Richard 
RAbusePhone:  +1-203-897-6085 
RAbuseEmail:  richard.fusco@natwestmarkets.com
RAbuseRef:    https://rdap.arin.net/registry/entity/FUSCO11-ARIN

RNOCHandle: FUSCO11-ARIN
RNOCName:   Fusco, Richard 
RNOCPhone:  +1-203-897-6085 
RNOCEmail:  richard.fusco@natwestmarkets.com
RNOCRef:    https://rdap.arin.net/registry/entity/FUSCO11-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.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS54004	Cablevision Lightpath LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS54004	Cablevision Lightpath LLC	US