What is ASN AS399485?

ASN AS399485 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS399485?

AS399485 is listed under The TCW Group, 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.

AS399485 The TCW Group, Inc. | IPGeolocation.io

ASN Lookup Tool

The TCW Group, Inc. tcw.com

US 1 Routes

AS Data

AS399485

AS399485 – The TCW Group, Inc.

AS Number	399485
AS Name	TCW-AS-TOR
Organization	The TCW Group, Inc.(tg-193)
Country	US
Website	tcw.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2021-03-24

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Use ASN data for AS399485 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
205.153.177.0/24	AS399485	The TCW Group, Inc.	The TCW Group, 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:       399485
ASName:         TCW-AS-TOR
ASHandle:       AS399485
RegDate:        2021-03-24
Updated:        2021-03-24    
Ref:            https://rdap.arin.net/registry/autnum/399485


OrgName:        The TCW Group, Inc.
OrgId:          TG-193
Address:        515 S. Flower Street
Address:        Suite 2700
City:           Los Angeles
StateProv:      CA
PostalCode:     90071
Country:        US
RegDate:        2016-11-14
Updated:        2025-01-22
Ref:            https://rdap.arin.net/registry/entity/TG-193


OrgAbuseHandle: LEONS1-ARIN
OrgAbuseName:   Leon, Stephen 
OrgAbusePhone:  +1-213-244-0569 
OrgAbuseEmail:  steve.leon@tcw.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LEONS1-ARIN

OrgNOCHandle: LEONS1-ARIN
OrgNOCName:   Leon, Stephen 
OrgNOCPhone:  +1-213-244-0569 
OrgNOCEmail:  steve.leon@tcw.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/LEONS1-ARIN

OrgTechHandle: ESNET-ARIN
OrgTechName:   es-network
OrgTechPhone:  +1-213-244-0208 
OrgTechEmail:  es-network@tcw.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ESNET-ARIN

OrgAbuseHandle: ESNET-ARIN
OrgAbuseName:   es-network
OrgAbusePhone:  +1-213-244-0208 
OrgAbuseEmail:  es-network@tcw.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ESNET-ARIN

OrgTechHandle: LEONS1-ARIN
OrgTechName:   Leon, Stephen 
OrgTechPhone:  +1-213-244-0569 
OrgTechEmail:  steve.leon@tcw.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LEONS1-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
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS701	Verizon Business	US