ASN AS55 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS55?

AS55 is listed under University of Pennsylvania.

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.

AS55 University of Pennsylvania

ASN Lookup Tool

University of Pennsylvania upenn.edu

US 6 Routes

AS Data

AS55

AS55 – University of Pennsylvania

AS Number	55
AS Name	UPENN
Organization	University of Pennsylvania(univer-8-z)
Country	US
Website	upenn.edu
Number of IPv4 Routes	5
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1985-12-18

ASN Intelligence API for production workflows

Use ASN data for AS55 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.84.2.0/24	AS55	University of Pennsylvania	University of Pennsylvania	256
2607:f470::/32	AS55	University of Pennsylvania	University of Pennsylvania	~79×10²⁷
158.130.0.0/16	AS55	University of Pennsylvania	University of Pennsylvania	65536
128.91.0.0/16	AS55	University of Pennsylvania	University of Pennsylvania	65536
130.91.0.0/16	AS55	University of Pennsylvania	University of Pennsylvania	65536
165.123.0.0/16	AS55	University of Pennsylvania	University of Pennsylvania	65536

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:       55
ASName:         UPENN
ASHandle:       AS55
RegDate:        1985-12-18
Updated:        2021-10-14
Comment:        https://www.upenn.edu/
Comment:        Main AS number for PennNet of the University of Pennsylvania    
Ref:            https://rdap.arin.net/registry/autnum/55


OrgName:        University of Pennsylvania
OrgId:          UNIVER-8-Z
Address:        3401 Walnut Street
Address:        Suite 221A
City:           Philadelphia
StateProv:      PA
PostalCode:     19104-6228
Country:        US
RegDate:        2010-01-05
Updated:        2022-08-03
Ref:            https://rdap.arin.net/registry/entity/UNIVER-8-Z


OrgTechHandle: OBRIE72-ARIN
OrgTechName:   O'Brien, John 
OrgTechPhone:  +1-215-898-9818 
OrgTechEmail:  obrienjw@upenn.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/OBRIE72-ARIN

OrgAbuseHandle: ISO-ARIN
OrgAbuseName:   Information Security Officer
OrgAbusePhone:  +1-215-573-2037 
OrgAbuseEmail:  security@upenn.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ISO-ARIN

OrgNOCHandle: UNIVE-ARIN
OrgNOCName:   University of Pennsylvania
OrgNOCPhone:  +1-215-573-9631 
OrgNOCEmail:  noc@isc.upenn.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/UNIVE-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
AS69	University of Pennsylvania	US
AS11537	Internet2	US
AS11164	Internet2	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS46274	Penn Medicine	US

Upstreams

AS Number	Description	Country
AS11537	Internet2	US
AS11164	Internet2	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Downstreams

AS Number	Description	Country
AS69	University of Pennsylvania	US
AS46274	Penn Medicine	US