ASN AS21743 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21743?

AS21743 is listed under Atlas Networks Corporation.

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.

AS21743 Atlas Networks Corporation

ASN Lookup Tool

Atlas Networks Corporation atlasnet.com

US 20 Routes

AS Data

AS21743

AS21743 – Atlas Networks Corporation

AS Number	21743
AS Name	ANL-36
Organization	Atlas Networks Corporation(anl-36)
Country	US
Website	atlasnet.com
Number of IPv4 Routes	18
Number of IPv6 Routes	2
ASN type	ISP
Registry	ARIN
Date Allocated	2011-01-20

ASN Intelligence API for production workflows

Use ASN data for AS21743 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
45.42.142.0/24	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	256
104.255.0.0/22	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	1024
104.254.210.0/23	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	512
69.5.52.0/22	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	1024
209.200.234.0/23	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	512
199.231.240.0/21	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	2048
2620:b9:e000::/48	AS21743	Atlas Networks Corporation	SolaDrive	~1×10²⁴
66.171.176.0/20	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	4096
216.247.100.0/22	AS4826	VOCUS PTY LTD	Atlas Networks Corporation	1024
66.248.243.0/24	AS21743	Atlas Networks Corporation	Atlas Networks Corporation	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:       21743
ASName:         ANL-36
ASHandle:       AS21743
RegDate:        2011-01-20
Updated:        2014-08-05    
Ref:            https://rdap.arin.net/registry/autnum/21743


OrgName:        Atlas Networks Corporation
OrgId:          ANL-36
Address:        2700 4th Ave S
Address:        Suite C
City:           Seattle
StateProv:      WA
PostalCode:     98134
Country:        US
RegDate:        2010-11-08
Updated:        2022-05-31
Ref:            https://rdap.arin.net/registry/entity/ANL-36


OrgNOCHandle: ANS7-ARIN
OrgNOCName:   Atlas Networks Support
OrgNOCPhone:  +1-206-395-7222 
OrgNOCEmail:  support@atlasnet.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ANS7-ARIN

OrgAbuseHandle: ANA68-ARIN
OrgAbuseName:   Atlas Networks Abuse
OrgAbusePhone:  +1-206-395-7222 
OrgAbuseEmail:  abuse@atlasnet.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ANA68-ARIN

OrgTechHandle: ANS7-ARIN
OrgTechName:   Atlas Networks Support
OrgTechPhone:  +1-206-395-7222 
OrgTechEmail:  support@atlasnet.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ANS7-ARIN

RNOCHandle: ANS7-ARIN
RNOCName:   Atlas Networks Support
RNOCPhone:  +1-206-395-7222 
RNOCEmail:  support@atlasnet.com
RNOCRef:    https://rdap.arin.net/registry/entity/ANS7-ARIN

RAbuseHandle: ANS7-ARIN
RAbuseName:   Atlas Networks Support
RAbusePhone:  +1-206-395-7222 
RAbuseEmail:  support@atlasnet.com
RAbuseRef:    https://rdap.arin.net/registry/entity/ANS7-ARIN

RTechHandle: ANS7-ARIN
RTechName:   Atlas Networks Support
RTechPhone:  +1-206-395-7222 
RTechEmail:  support@atlasnet.com
RTechRef:    https://rdap.arin.net/registry/entity/ANS7-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
AS58511	Anycast Global Backbone	AU
AS24482	SG.GS	SG
AS3786	LG DACOM Corporation	KR
AS393577	Tritan Development	US
AS34927	iFog GmbH	CH
AS401703	Ordinal Advisors LLC	US
AS6939	Hurricane Electric LLC	US
AS286	GTT Communications Inc.	US
AS11404	Wave Broadband	US
AS64289	Macarne.com	US

Upstreams

AS Number	Description	Country
AS7575	Australian Academic and Research Network	AU
AS394256	Tech Futures Interactive Inc.	CA
AS9002	RETN Limited	GB
AS6939	Hurricane Electric LLC	US
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS2914	NTT America, Inc.	US
AS137409	GSL Networks Pty LTD	AU