ASN AS20252 is an Autonomous System Number used to identify a network for BGP internet routing.

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.

AS20252 Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University

Q: Who manages ASN AS20252?

AS20252 is listed under Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University.

ASN Lookup Tool

Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University med.cornell.edu

US 4 Routes

AS Data

AS20252

AS20252 – Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University

AS Number	20252
AS Name	JSIWMC
Organization	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University(joanan)
Country	US
Website	med.cornell.edu
Number of IPv4 Routes	4
Number of IPv6 Routes	0
ASN type	EDUCATION
Registry	ARIN
Date Allocated	2001-04-12

ASN Intelligence API for production workflows

Use ASN data for AS20252 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
140.251.0.0/17	AS20252	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	32768
207.162.253.0/24	AS20252	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	Weill Cornell Medical College in Qatar	256
157.139.0.0/16	AS20252	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	65536
38.146.193.0/24	AS20252	Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University	Weill Cornell Medical College of Cornell University	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:       20252
ASName:         JSIWMC
ASHandle:       AS20252
RegDate:        2001-04-12
Updated:        2012-02-24    
Ref:            https://rdap.arin.net/registry/autnum/20252


OrgName:        Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University
OrgId:          JOANAN
Address:        1300 York Avenue
City:           New York
StateProv:      NY
PostalCode:     10065
Country:        US
RegDate:        2000-06-07
Updated:        2013-07-31
Ref:            https://rdap.arin.net/registry/entity/JOANAN


OrgTechHandle: NOC216-ARIN
OrgTechName:   Network Operations Center
OrgTechPhone:  +1-212-746-4878 
OrgTechEmail:  noc@med.cornell.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/NOC216-ARIN

OrgAbuseHandle: ISAR-ARIN
OrgAbuseName:   Information Security Abuse Response
OrgAbusePhone:  +1-212-746-4878 
OrgAbuseEmail:  abuse@med.cornell.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ISAR-ARIN

OrgNOCHandle: NOC216-ARIN
OrgNOCName:   Network Operations Center
OrgNOCPhone:  +1-212-746-4878 
OrgNOCEmail:  noc@med.cornell.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC216-ARIN

RTechHandle: VIV3-ARIN
RTechName:   Varughese, Vinay I.
RTechPhone:  +1-212-746-4622 
RTechEmail:  vinay@med.cornell.edu
RTechRef:    https://rdap.arin.net/registry/entity/VIV3-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
AS3754	NYSERNet	US
AS12271	Charter Communications Inc	US
AS3630	NYSERNet	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS3754	NYSERNet	US
AS12271	Charter Communications Inc	US
AS3630	NYSERNet	US
AS174	Cogent Communications, LLC	US

Contacts

Email Contacts

noc@med.cornell.edu

Abuse Contacts

abuse@med.cornell.edu