ASN AS20 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS20?

AS20 is listed under University of Rochester.

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.

AS20 University of Rochester | IPGeolocation.io

University of Rochester rochester.edu

US 4 Routes

AS Data

AS20

AS20 – University of Rochester

AS Number	20
AS Name	UR
Organization	University of Rochester(univer-40-z)
Country	US
Website	rochester.edu
Number of IPv4 Routes	3
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1984-07-27

ASN Intelligence API for production workflows

Use ASN data for AS20 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
128.151.0.0/16	AS20	University of Rochester	University of Rochester	65536
2620:107:a000::/40	AS20	University of Rochester	University of Rochester	~309×10²⁴
199.89.214.0/24	AS20	University of Rochester	University of Rochester	256
192.5.53.0/24	AS20	University of Rochester	University of Rochester	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:       20
ASName:         UR
ASHandle:       AS20
RegDate:        1984-07-27
Updated:        2019-10-01    
Ref:            https://rdap.arin.net/registry/autnum/20


OrgName:        University of Rochester
OrgId:          UNIVER-40-Z
Address:        University IT
Address:        44 Celebration Drive, Suite 3.100
City:           Rochester
StateProv:      NY
PostalCode:     14627-8937
Country:        US
RegDate:        2009-03-30
Updated:        2024-11-12
Comment:        Please report network abuse complaints to
Comment:        abuse@rochester.edu
Ref:            https://rdap.arin.net/registry/entity/UNIVER-40-Z


OrgDNSHandle: FERNA540-ARIN
OrgDNSName:   Fernandes, Amit 
OrgDNSPhone:  +1-585-275-9113 
OrgDNSEmail:  amit.fernandes@rochester.edu
OrgDNSRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

OrgRoutingHandle: DRB62-ARIN
OrgRoutingName:   Bentley, Douglas R
OrgRoutingPhone:  +1-585-275-6550 
OrgRoutingEmail:  douglas.bentley@rochester.edu
OrgRoutingRef:    https://rdap.arin.net/registry/entity/DRB62-ARIN

OrgAbuseHandle: DRB62-ARIN
OrgAbuseName:   Bentley, Douglas R
OrgAbusePhone:  +1-585-275-6550 
OrgAbuseEmail:  douglas.bentley@rochester.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DRB62-ARIN

OrgTechHandle: URTC-ARIN
OrgTechName:   University of Rochester Technical Contact
OrgTechPhone:  +1-585-275-2000 
OrgTechEmail:  UR-TECH-CONTACT@LISTS.ROCHESTER.EDU
OrgTechRef:    https://rdap.arin.net/registry/entity/URTC-ARIN

OrgAbuseHandle: URAC1-ARIN
OrgAbuseName:   University of Rochester Abuse Contact
OrgAbusePhone:  +1-585-275-2000 
OrgAbuseEmail:  abuse@rochester.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/URAC1-ARIN

OrgTechHandle: FERNA540-ARIN
OrgTechName:   Fernandes, Amit 
OrgTechPhone:  +1-585-275-9113 
OrgTechEmail:  amit.fernandes@rochester.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

OrgTechHandle: DRB62-ARIN
OrgTechName:   Bentley, Douglas R
OrgTechPhone:  +1-585-275-6550 
OrgTechEmail:  douglas.bentley@rochester.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/DRB62-ARIN

OrgNOCHandle: FERNA540-ARIN
OrgNOCName:   Fernandes, Amit 
OrgNOCPhone:  +1-585-275-9113 
OrgNOCEmail:  amit.fernandes@rochester.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

OrgRoutingHandle: URTC-ARIN
OrgRoutingName:   University of Rochester Technical Contact
OrgRoutingPhone:  +1-585-275-0090 
OrgRoutingEmail:  UR-TECH-CONTACT@LISTS.ROCHESTER.EDU
OrgRoutingRef:    https://rdap.arin.net/registry/entity/URTC-ARIN

OrgDNSHandle: URTC-ARIN
OrgDNSName:   University of Rochester Technical Contact
OrgDNSPhone:  +1-585-275-0090 
OrgDNSEmail:  UR-TECH-CONTACT@LISTS.ROCHESTER.EDU
OrgDNSRef:    https://rdap.arin.net/registry/entity/URTC-ARIN

OrgDNSHandle: DRB62-ARIN
OrgDNSName:   Bentley, Douglas R
OrgDNSPhone:  +1-585-275-6550 
OrgDNSEmail:  douglas.bentley@rochester.edu
OrgDNSRef:    https://rdap.arin.net/registry/entity/DRB62-ARIN

OrgNOCHandle: DRB62-ARIN
OrgNOCName:   Bentley, Douglas R
OrgNOCPhone:  +1-585-275-6550 
OrgNOCEmail:  douglas.bentley@rochester.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/DRB62-ARIN

OrgNOCHandle: URTC-ARIN
OrgNOCName:   University of Rochester Technical Contact
OrgNOCPhone:  +1-585-275-0090 
OrgNOCEmail:  UR-TECH-CONTACT@LISTS.ROCHESTER.EDU
OrgNOCRef:    https://rdap.arin.net/registry/entity/URTC-ARIN

OrgAbuseHandle: FERNA540-ARIN
OrgAbuseName:   Fernandes, Amit 
OrgAbusePhone:  +1-585-275-9113 
OrgAbuseEmail:  amit.fernandes@rochester.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

OrgRoutingHandle: FERNA540-ARIN
OrgRoutingName:   Fernandes, Amit 
OrgRoutingPhone:  +1-585-275-9113 
OrgRoutingEmail:  amit.fernandes@rochester.edu
OrgRoutingRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

RTechHandle: FERNA540-ARIN
RTechName:   Fernandes, Amit 
RTechPhone:  +1-585-275-9113 
RTechEmail:  amit.fernandes@rochester.edu
RTechRef:    https://rdap.arin.net/registry/entity/FERNA540-ARIN

RTechHandle: URTC-ARIN
RTechName:   University of Rochester Technical Contact
RTechPhone:  +1-585-275-0090 
RTechEmail:  UR-TECH-CONTACT@LISTS.ROCHESTER.EDU
RTechRef:    https://rdap.arin.net/registry/entity/URTC-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
AS3754	NYSERNet	US
AS3356	Level 3 Parent, LLC	US
AS3630	NYSERNet	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS3754	NYSERNet	US
AS3356	Level 3 Parent, LLC	US
AS3630	NYSERNet	US
AS174	Cogent Communications, LLC	US

Contacts

Email Contacts

UR-TECH-CONTACT@LISTS.ROCHESTER.EDU douglas.bentley@rochester.edu amit.fernandes@rochester.edu

Abuse Contacts

abuse@rochester.edu

ASN Lookup Tool

ASN Summary