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AS25978 Rush University Medical Center

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

ASN Lookup Tool

Rush University Medical Center rush.edu

US 2 Routes

AS Data

AS25978

AS25978 – Rush University Medical Center

AS Number	25978
AS Name	RUSH-EXTERNAL
Organization	Rush University Medical Center(rplmc)
Country	US
Website	rush.edu
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	EDUCATION
Registry	ARIN
Date Allocated	2025-02-19

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Use ASN data for AS25978 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
144.74.0.0/17	AS25978	Rush University Medical Center	Rush University Medical Center	32768
144.74.128.0/17	AS25978	Rush University Medical Center	Rush University Medical Center	32768

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:       25978
ASName:         RUSH-EXTERNAL
ASHandle:       AS25978
RegDate:        2025-02-19
Updated:        2025-02-19    
Ref:            https://rdap.arin.net/registry/autnum/25978


OrgName:        Rush University Medical Center
OrgId:          RPLMC
Address:        1653 W. Congress Parkway
City:           Chicago
StateProv:      IL
PostalCode:     60612
Country:        US
RegDate:        1990-11-16
Updated:        2024-12-04
Ref:            https://rdap.arin.net/registry/entity/RPLMC


OrgTechHandle: CLUKE-ARIN
OrgTechName:   Clukey, Jay 
OrgTechPhone:  +1-312-942-4062 
OrgTechEmail:  jclukey@rush.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/CLUKE-ARIN

OrgAbuseHandle: KLO1-ARIN
OrgAbuseName:   ODER, KARL 
OrgAbusePhone:  +1-312-942-8940 
OrgAbuseEmail:  koder@rush.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KLO1-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
AS33491	Comcast Cable Communications, LLC	US
AS46887	Crown Castle Fiber LLC	US

Upstreams

AS Number	Description	Country
AS33491	Comcast Cable Communications, LLC	US
AS46887	Crown Castle Fiber LLC	US

Frequently Asked Questions

What is ASN AS25978?

ASN AS25978 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS25978?

AS25978 is listed under Rush University Medical Center.

What do peers, upstreams, and downstreams mean?

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 included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.