ASN AS12185 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS12185?

AS12185 is listed under Thompson, Siegel & Walmsley LLC.

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.

AS12185 Thompson, Siegel & Walmsley LLC

ASN Lookup Tool

Thompson, Siegel & Walmsley LLC tswinvest.com

US 3 Routes

AS Data

AS12185

AS12185 – Thompson, Siegel & Walmsley LLC

AS Number	12185
AS Name	ASN1
Organization	Thompson, Siegel & Walmsley LLC(thomp-32)
Country	US
Website	tswinvest.com
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2009-02-03

ASN Intelligence API for production workflows

Use ASN data for AS12185 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
74.63.155.0/24	AS12185	Thompson, Siegel & Walmsley LLC	Flexential Colorado Corp.	256
8.43.93.0/24	AS12185	Thompson, Siegel & Walmsley LLC	Thompson, Siegel & Walmsley LLC	256
209.96.132.0/24	AS12185	Thompson, Siegel & Walmsley LLC	Windstream Communications LLC	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:       12185
ASName:         ASN1
ASHandle:       AS12185
RegDate:        2009-02-03
Updated:        2025-06-09    
Ref:            https://rdap.arin.net/registry/autnum/12185


OrgName:        Thompson, Siegel & Walmsley LLC
OrgId:          THOMP-32
Address:        6806 Paragon Place
Address:        Suite 300
City:           Richmond
StateProv:      VA
PostalCode:     23230
Country:        US
RegDate:        2008-11-20
Updated:        2025-06-09
Ref:            https://rdap.arin.net/registry/entity/THOMP-32


OrgAbuseHandle: TSW44-ARIN
OrgAbuseName:   TSW
OrgAbusePhone:  +1-804-353-4500 
OrgAbuseEmail:  ecayton@tswinvest.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/TSW44-ARIN

OrgTechHandle: TSW44-ARIN
OrgTechName:   TSW
OrgTechPhone:  +1-804-353-4500 
OrgTechEmail:  ecayton@tswinvest.com
OrgTechRef:    https://rdap.arin.net/registry/entity/TSW44-ARIN

RTechHandle: TSW44-ARIN
RTechName:   TSW
RTechPhone:  +1-804-353-4500 
RTechEmail:  ecayton@tswinvest.com
RTechRef:    https://rdap.arin.net/registry/entity/TSW44-ARIN

RAbuseHandle: TSW44-ARIN
RAbuseName:   TSW
RAbusePhone:  +1-804-353-4500 
RAbuseEmail:  ecayton@tswinvest.com
RAbuseRef:    https://rdap.arin.net/registry/entity/TSW44-ARIN

RNOCHandle: TSW44-ARIN
RNOCName:   TSW
RNOCPhone:  +1-804-353-4500 
RNOCEmail:  ecayton@tswinvest.com
RNOCRef:    https://rdap.arin.net/registry/entity/TSW44-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
AS7029	Windstream Communications LLC	US
AS3356	Level 3 Parent, LLC	US
AS13649	Flexential Colorado Corp.	US

Upstreams

AS Number	Description	Country
AS7029	Windstream Communications LLC	US
AS3356	Level 3 Parent, LLC	US
AS13649	Flexential Colorado Corp.	US