ASN AS21504 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21504?

AS21504 is listed under The Bessemer 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.

AS21504 The Bessemer Group, Inc.

ASN Lookup Tool

The Bessemer Group, Inc. bessemer.com

US 20 Routes

AS Data

AS21504

AS21504 – The Bessemer Group, Inc.

AS Number	21504
AS Name	BESSEMER-GROUP-INCORPORATED
Organization	The Bessemer Group, Inc.(bessem)
Country	US
Website	bessemer.com
Number of IPv4 Routes	20
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2014-05-28

ASN Intelligence API for production workflows

Use ASN data for AS21504 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.160.43.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.35.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.52.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Trust Company	256
198.160.37.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.50.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Trust Company	256
198.160.45.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.38.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.53.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Trust Company	256
198.160.34.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Group, Inc.	256
198.160.55.0/24	AS21504	The Bessemer Group, Inc.	Bessemer Trust Company	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:       21504
ASName:         BESSEMER-GROUP-INCORPORATED
ASHandle:       AS21504
RegDate:        2014-05-28
Updated:        2014-05-28    
Ref:            https://rdap.arin.net/registry/autnum/21504


OrgName:        The Bessemer Group, Inc.
OrgId:          BESSEM
Address:        100 Woodbridge Center Drv.
City:           Woodbridge
StateProv:      NJ
PostalCode:     07095
Country:        US
RegDate:        1993-05-04
Updated:        2016-11-29
Ref:            https://rdap.arin.net/registry/entity/BESSEM


OrgTechHandle: TWA175-ARIN
OrgTechName:   Techops Web  Administrator
OrgTechPhone:  +1-732-694-5613 
OrgTechEmail:  techops@bessemer.com
OrgTechRef:    https://rdap.arin.net/registry/entity/TWA175-ARIN

OrgAbuseHandle: TWA175-ARIN
OrgAbuseName:   Techops Web  Administrator
OrgAbusePhone:  +1-732-694-5613 
OrgAbuseEmail:  techops@bessemer.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/TWA175-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
AS55002	F5, Inc.	US
AS1239	Cogent Communications, LLC	US
AS46450	Pilot Fiber, Inc.	US
AS33287	Comcast Cable Communications, LLC	US
AS701	Verizon Business/UUnet	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS55002	F5, Inc.	US
AS46450	Pilot Fiber, Inc.	US
AS33287	Comcast Cable Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US
AS701	Verizon Business	US
AS54004	Cablevision Lightpath LLC	US