ASN AS21935 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21935?

AS21935 is listed under Epsilon Data Management 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.

AS21935 Epsilon Data Management LLC

ASN Lookup Tool

Epsilon Data Management LLC epsilon.com

US 1 Routes

AS Data

AS21935

AS21935 – Epsilon Data Management LLC

AS Number	21935
AS Name	EPSILONDATA50
Organization	Epsilon Data Management LLC(psi1)
Country	US
Website	epsilon.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-07-16

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Use ASN data for AS21935 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
159.127.199.0/24	AS21935	Epsilon Data Management LLC	Epsilon Data Management 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:       21935
ASName:         EPSILONDATA50
ASHandle:       AS21935
RegDate:        2001-07-16
Updated:        2012-02-24    
Ref:            https://rdap.arin.net/registry/autnum/21935


OrgName:        Epsilon Data Management LLC
OrgId:          PSI1
Address:        601 Edgewater Drive
City:           Wakefield
StateProv:      MA
PostalCode:     01880
Country:        US
RegDate:        1996-10-07
Updated:        2025-05-14
Ref:            https://rdap.arin.net/registry/entity/PSI1


OrgTechHandle: ACCOU204-ARIN
OrgTechName:   Account Admin
OrgTechPhone:  +1-800-309-0505 
OrgTechEmail:  ito_networks@epsilon.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ACCOU204-ARIN

OrgAbuseHandle: DELIV1-ARIN
OrgAbuseName:   Delivery Team
OrgAbusePhone:  +1-781-685-6000 
OrgAbuseEmail:  deliverabilityteam@epsilon.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DELIV1-ARIN

OrgTechHandle: BOOKE39-ARIN
OrgTechName:   Booker, Scott 
OrgTechPhone:  +1-469-262-1577 
OrgTechEmail:  scott.booker@epsilon.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BOOKE39-ARIN

OrgTechHandle: GLENN1457-ARIN
OrgTechName:   Glenn, Robert 
OrgTechPhone:  +1-469-770-2678 
OrgTechEmail:  robert.glenn@epsilon.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GLENN1457-ARIN

OrgTechHandle: LEBAR-ARIN
OrgTechName:   LEBARON, JASON 
OrgTechPhone:  +1-469-770-2425 
OrgTechEmail:  JASON.LEBARON@EPSILON.COM
OrgTechRef:    https://rdap.arin.net/registry/entity/LEBAR-ARIN

OrgTechHandle: RFU24-ARIN
OrgTechName:   Fu, Rich 
OrgTechPhone:  +1-781-685-6000 
OrgTechEmail:  rich.fu@epsilon.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RFU24-ARIN

RTechHandle: SA610-ARIN
RTechName:   Almquist, Sally 
RTechPhone:  +1-781-451-3462 
RTechEmail:  salmquist@epsilon.com
RTechRef:    https://rdap.arin.net/registry/entity/SA610-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
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US