ASN AS5724 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS5724?

AS5724 is listed under University of Massachusetts Medical School.

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.

AS5724 University of Massachusetts Medical School

ASN Lookup Tool

University of Massachusetts Medical School umassmed.edu

US 4 Routes

AS Data

AS5724

AS5724 – University of Massachusetts Medical School

AS Number	5724
AS Name	UMASSMED
Organization	University of Massachusetts Medical School(ummc-1-z)
Country	US
Website	umassmed.edu
Number of IPv4 Routes	4
Number of IPv6 Routes	0
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1995-09-06

ASN Intelligence API for production workflows

Use ASN data for AS5724 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
146.189.26.0/24	AS5724	University of Massachusetts Medical School	University of Massachusetts Medical School	256
146.189.0.0/16	AS5724	University of Massachusetts Medical School	University of Massachusetts Medical School	65536
146.189.128.0/21	AS5724	University of Massachusetts Medical School	University of Massachusetts Medical School	2048
146.189.25.0/24	AS5724	University of Massachusetts Medical School	University of Massachusetts Medical School	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:       5724
ASName:         UMASSMED
ASHandle:       AS5724
RegDate:        1995-09-06
Updated:        2023-07-01
Comment:        http://www.umassmed.edu    
Ref:            https://rdap.arin.net/registry/autnum/5724


OrgName:        University of Massachusetts Medical School
OrgId:          UMMC-1-Z
Address:        55 Lake Avenue North
City:           Worcester
StateProv:      MA
PostalCode:     01655
Country:        US
RegDate:        2023-06-20
Updated:        2023-06-20
Ref:            https://rdap.arin.net/registry/entity/UMMC-1-Z


OrgTechHandle: HOSTE28-ARIN
OrgTechName:   Hosted Services
OrgTechPhone:  +1-508-612-1138 
OrgTechEmail:  HostedServices@umassmed.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN

OrgAbuseHandle: HOSTE28-ARIN
OrgAbuseName:   Hosted Services
OrgAbusePhone:  +1-508-612-1138 
OrgAbuseEmail:  HostedServices@umassmed.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN

OrgNOCHandle: HOSTE28-ARIN
OrgNOCName:   Hosted Services
OrgNOCPhone:  +1-508-612-1138 
OrgNOCEmail:  HostedServices@umassmed.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/HOSTE28-ARIN

RTechHandle: HOSTE28-ARIN
RTechName:   Hosted Services
RTechPhone:  +1-508-612-1138 
RTechEmail:  HostedServices@umassmed.edu
RTechRef:    https://rdap.arin.net/registry/entity/HOSTE28-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
AS398427	Markley Network Services, LLC	US
AS10578	Harvard University	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS398427	Markley Network Services, LLC	US
AS10578	Harvard University	US
AS174	Cogent Communications, LLC	US