ASN AS19580 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS19580?

AS19580 is listed under A.R.T. Advisors, 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.

AS19580 A.R.T. Advisors, LLC | IPGeolocation.io

ASN Lookup Tool

A.R.T. Advisors, LLC art-llc.com

US 9 Routes

AS Data

AS19580

AS19580 – A.R.T. Advisors, LLC

AS Number	19580
AS Name	ART-LLC
Organization	A.R.T. Advisors, LLC(aal-140)
Country	US
Website	art-llc.com
Number of IPv4 Routes	9
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2014-05-21

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Use ASN data for AS19580 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
149.85.101.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.1.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.2.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.11.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.6.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.8.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.5.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.7.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	256
149.85.12.0/24	AS19580	A.R.T. Advisors, LLC	ART Advisors	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:       19580
ASName:         ART-LLC
ASHandle:       AS19580
RegDate:        2014-05-21
Updated:        2014-05-21    
Ref:            https://rdap.arin.net/registry/autnum/19580


OrgName:        A.R.T. Advisors, LLC
OrgId:          AAL-140
Address:        500 Park Ave.
Address:        7th Floor
City:           New York
StateProv:      NY
PostalCode:     10022
Country:        US
RegDate:        2014-04-18
Updated:        2024-03-15
Ref:            https://rdap.arin.net/registry/entity/AAL-140


OrgRoutingHandle: ADMIN8650-ARIN
OrgRoutingName:   Admins, System 
OrgRoutingPhone:  +1-212-303-6167 
OrgRoutingEmail:  colosupport@art-llc.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN

OrgDNSHandle: ADMIN8650-ARIN
OrgDNSName:   Admins, System 
OrgDNSPhone:  +1-212-303-6167 
OrgDNSEmail:  colosupport@art-llc.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN

OrgNOCHandle: ADMIN8650-ARIN
OrgNOCName:   Admins, System 
OrgNOCPhone:  +1-212-303-6167 
OrgNOCEmail:  colosupport@art-llc.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN

OrgAbuseHandle: ADMIN8650-ARIN
OrgAbuseName:   Admins, System 
OrgAbusePhone:  +1-212-303-6167 
OrgAbuseEmail:  colosupport@art-llc.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN

OrgTechHandle: ADMIN8650-ARIN
OrgTechName:   Admins, System 
OrgTechPhone:  +1-212-303-6167 
OrgTechEmail:  colosupport@art-llc.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN8650-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
AS1239	Cogent Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US