ASN AS5723 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS5723?

AS5723 is listed under Johns Hopkins University.

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.

AS5723 Johns Hopkins University

ASN Lookup Tool

Johns Hopkins University jhu.edu

US 9 Routes

AS Data

AS5723

AS5723 – Johns Hopkins University

AS Number	5723
AS Name	JHU
Organization	Johns Hopkins University(jhu-z)
Country	US
Website	jhu.edu
Number of IPv4 Routes	8
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1995-09-06

ASN Intelligence API for production workflows

Use ASN data for AS5723 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
192.12.13.0/24	AS5723	Johns Hopkins University	Johns Hopkins University	256
128.220.0.0/16	AS5723	Johns Hopkins University	Johns Hopkins University	65536
198.57.39.0/24	AS5723	Johns Hopkins University	Johns Hopkins All Children's Hospital, Inc.	256
204.124.184.0/22	AS5723	Johns Hopkins University	Johns Hopkins All Children's Hospital, Inc.	1024
2606:2b00::/32	AS5723	Johns Hopkins University	Johns Hopkins University	~79×10²⁷
192.12.14.0/24	AS5723	Johns Hopkins University	Johns Hopkins University	256
198.57.40.0/22	AS5723	Johns Hopkins University	Johns Hopkins All Children's Hospital, Inc.	1024
162.129.0.0/16	AS5723	Johns Hopkins University	The Johns Hopkins Medical Institutions	65536
198.57.32.0/21	AS5723	Johns Hopkins University	Johns Hopkins All Children's Hospital, Inc.	2048

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:       5723
ASName:         JHU
ASHandle:       AS5723
RegDate:        1995-09-06
Updated:        2020-09-08    
Ref:            https://rdap.arin.net/registry/autnum/5723


OrgName:        Johns Hopkins University
OrgId:          JHU-Z
Address:        Hopkins Information Technology Services
Address:        3400 North Charles Street
Address:        Garland Hall, Suite 020
City:           Baltimore
StateProv:      MD
PostalCode:     21218
Country:        US
RegDate:        2020-08-28
Updated:        2020-08-28
Ref:            https://rdap.arin.net/registry/entity/JHU-Z


OrgTechHandle: DZ24-ARIN
OrgTechName:   Network Operation Center
OrgTechPhone:  +1-410-516-4357 
OrgTechEmail:  noc@jhu.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/DZ24-ARIN

OrgAbuseHandle: DZ24-ARIN
OrgAbuseName:   Network Operation Center
OrgAbusePhone:  +1-410-516-4357 
OrgAbuseEmail:  noc@jhu.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DZ24-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
AS77	Johns Hopkins University Applied Physics Laboratory	US
AS6939	Hurricane Electric LLC	US
AS10886	University of Maryland	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS11096	FloridaNet	US

Upstreams

AS Number	Description	Country
AS6939	Hurricane Electric LLC	US
AS10886	University of Maryland	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS11096	FloridaNet	US

Downstreams

AS Number	Description	Country
AS77	Johns Hopkins University Applied Physics Laboratory	US