ASN AS101 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS101?

AS101 is listed under University of Washington.

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.

AS101 University of Washington

ASN Lookup Tool

University of Washington uw.edu

US 9 Routes

AS Data

AS101

AS101 – University of Washington

AS Number	101
AS Name	WASH-NSF-AS
Organization	University of Washington(uwnd-z)
Country	US
Website	uw.edu
Number of IPv4 Routes	4
Number of IPv6 Routes	5
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1987-03-31

ASN Intelligence API for production workflows

Use ASN data for AS101 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2001:1860:4000::/34	AS101	University of Washington	Pacific Northwest Gigapop	~20×10²⁷
2001:1860:8000::/34	AS101	University of Washington	Pacific Northwest Gigapop	~20×10²⁷
207.231.240.0/20	AS101	University of Washington	Pacific Wave	4096
209.124.176.0/21	AS101	University of Washington	Pacific Northwest Gigapop	2048
2001:1860::/32	AS101	University of Washington	Pacific Northwest Gigapop	~79×10²⁷
209.124.184.0/21	AS101	University of Washington	Pacific Northwest Gigapop	2048
2001:504:b::/48	AS101	University of Washington	Pacific Wave	~1×10²⁴
2001:1860:c000::/34	AS101	University of Washington	Pacific Northwest Gigapop	~20×10²⁷
209.124.176.0/20	AS101	University of Washington	Pacific Northwest Gigapop	4096

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:       101
ASName:         WASH-NSF-AS
ASHandle:       AS101
RegDate:        1987-03-31
Updated:        2021-10-01    
Ref:            https://rdap.arin.net/registry/autnum/101


OrgName:        University of Washington
OrgId:          UWND-Z
Address:        4545 15th Ave NE
City:           Seattle
StateProv:      WA
PostalCode:     98105
Country:        US
RegDate:        2020-05-20
Updated:        2024-08-06
Ref:            https://rdap.arin.net/registry/entity/UWND-Z


OrgNOCHandle: UW-NOC-ARIN
OrgNOCName:   University of Washington Networks and Distributed
OrgNOCPhone:  +1-206-221-6000 
OrgNOCEmail:  uw-noc@uw.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/UW-NOC-ARIN

OrgAbuseHandle: UWSO-ARIN
OrgAbuseName:   University of Washington Security Operations
OrgAbusePhone:  +1-206-221-7000 
OrgAbuseEmail:  abuse@uw.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/UWSO-ARIN

OrgTechHandle: UW-NOC-ARIN
OrgTechName:   University of Washington Networks and Distributed
OrgTechPhone:  +1-206-221-6000 
OrgTechEmail:  uw-noc@uw.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/UW-NOC-ARIN

RTechHandle: UW-NOC-ARIN
RTechName:   University of Washington Networks and Distributed
RTechPhone:  +1-206-221-6000 
RTechEmail:  uw-noc@uw.edu
RTechRef:    https://rdap.arin.net/registry/entity/UW-NOC-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
AS22335	Metropolitan Research and Education Network	US
AS65005
AS668	United States Department of Defense (DoD)	US
AS10430	Washington State K 20 Telecommunications Network	US
AS393577	Tritan Development	US
AS401703	Ordinal Advisors LLC	US
AS6939	Hurricane Electric LLC	US
AS4777	Asia Pacific Network Information Centre	JP
AS10242	US Internet Corp	US
AS4775	Globe Telecoms	PH

Upstreams

AS Number	Description	Country
AS65005
AS9002	RETN Limited	GB
AS11537	Internet2	US
AS6939	Hurricane Electric LLC	US
AS11164	Internet2	US
AS174	Cogent Communications, LLC	US
AS2907	Research Organization of Information and Systems, National Institute of Informatics	JP
AS2497	Internet Initiative Japan Inc.	JP
AS3491	PCCW Global, Inc.	US
AS293	ESnet	US

Downstreams

AS Number	Description	Country
AS17200	Seattle Community College District	US
AS14221	University of Washington	US
AS65005
AS10430	Washington State K 20 Telecommunications Network	US
AS40272	Allen Institute	US
AS7774	University of Alaska	US
AS47065	USC / UFMG PEERING Research Testbed	US
AS54429	Local Connectivity Lab	US
AS19014	NORCOM	US
AS4193	State of Washington	US