ASN AS40387 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS40387?

AS40387 is listed under University of Illinois.

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.

AS40387 University of Illinois

ASN Lookup Tool

University of Illinois illinois.edu

US 2 Routes

AS Data

AS40387

AS40387 – University of Illinois

AS Number	40387
AS Name	UI-ICCN
Organization	University of Illinois(uiuc)
Country	US
Website	illinois.edu
Number of IPv4 Routes	1
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	2007-02-07

ASN Intelligence API for production workflows

Use ASN data for AS40387 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2620:0:e10::/48	AS40387	University of Illinois	University of Illinois	~1×10²⁴
72.36.120.0/21	AS40387	University of Illinois	University of Illinois	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:       40387
ASName:         UI-ICCN
ASHandle:       AS40387
RegDate:        2007-02-07
Updated:        2014-12-02    
Ref:            https://rdap.arin.net/registry/autnum/40387


OrgName:        University of Illinois
OrgId:          UIUC
Address:        1120 DCL, MC-256
Address:        1304 West Springfield Avenue
City:           Urbana
StateProv:      IL
PostalCode:     61801
Country:        US
RegDate:        
Updated:        2014-12-02
Ref:            https://rdap.arin.net/registry/entity/UIUC


OrgTechHandle: HOSTM159-ARIN
OrgTechName:   Hostmgr
OrgTechPhone:  +1-217-244-1000 
OrgTechEmail:  dns-admin@illinois.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTM159-ARIN

OrgAbuseHandle: UIUCS-ARIN
OrgAbuseName:   UIUC Security
OrgAbusePhone:  +1-217-265-0000 
OrgAbuseEmail:  abuse@illinois.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/UIUCS-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
AS237	Merit Network Inc.	US
AS22335	Metropolitan Research and Education Network	US
AS1224	University of Illinois	US
AS38	University of Illinois	US
AS3676	University of Iowa	US
AS6200	University of Illinois Chicago	US
AS160	The University of Chicago	US
AS19782	Indiana University	US
AS57	University of Minnesota	US
AS293	ESnet	US

Upstreams

AS Number	Description	Country
AS22335	Metropolitan Research and Education Network	US
AS23473	PAVLOV MEDIA INC	US
AS2381	WiscNet	US
AS293	ESnet	US
AS11537	Internet2	US
AS1299	Arelion Sweden AB	SE
AS11164	Internet2	US

Downstreams

AS Number	Description	Country
AS1224	University of Illinois	US
AS38	University of Illinois	US
AS698	University of Illinois	US
AS32464	University Of Illinois College Of Medicine At Peoria	US
AS14834	University of Illinois at Springfield	US
AS26367	Bradley University	US
AS6200	University of Illinois Chicago	US