ASN AS231 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS231?

AS231 is listed under Michigan State 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.

AS231 Michigan State University

ASN Lookup Tool

Michigan State University msu.edu

US 9 Routes

AS Data

AS231

AS231 – Michigan State University

AS Number	231
AS Name	MISU-231
Organization	Michigan State University (misu)
Country	US
Website	msu.edu
Number of IPv4 Routes	7
Number of IPv6 Routes	2
ASN type	EDUCATION
Registry	ARIN
Date Allocated	2021-06-28

ASN Intelligence API for production workflows

Use ASN data for AS231 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.231.113.0/24	AS231	Michigan State University	Michigan State University	256
192.108.188.0/24	AS231	Michigan State University	Michigan State University	256
35.12.240.0/21	AS231	Michigan State University	Michigan State University	2048
192.108.190.0/24	AS231	Michigan State University	Michigan State University	256
2605:dd00:8000::/48	AS231	Michigan State University	Michigan State University	~1×10²⁴
35.20.0.0/14	AS231	Michigan State University	Michigan State University	262144
35.8.0.0/13	AS231	Michigan State University	Michigan State University	524288
192.108.191.0/24	AS231	Michigan State University	Michigan State University	256
2605:dd00::/32	AS231	Michigan State University	Michigan State University	~79×10²⁷

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:       231
ASName:         MISU-231
ASHandle:       AS231
RegDate:        2021-06-28
Updated:        2021-06-28
Ref:            https://rdap.arin.net/registry/autnum/231


OrgName:        Michigan State University
OrgId:          MISU
Address:        IT Services
Address:        450 Auditorium Rd., Suite 400
City:           East Lansing
StateProv:      MI
PostalCode:     48824
Country:        US
RegDate:        1991-07-24
Updated:        2023-10-31
Ref:            https://rdap.arin.net/registry/entity/MISU


OrgAbuseHandle: ATS14-ARIN
OrgAbuseName:   Abuse Technical Support
OrgAbusePhone:  +1-517-432-6200 
OrgAbuseEmail:  abuse@msu.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ATS14-ARIN

OrgTechHandle: DTS21-ARIN
OrgTechName:   DNS Technical Support
OrgTechPhone:  +1-517-432-6200 
OrgTechEmail:  dnstech@msu.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/DTS21-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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "231",
    "as_handle" : "AS231",
    "as_name" : "MISU-231",
    "tech_contacts" : [ "DTS21-ARIN" ],
    "abuse_contacts" : [ "ATS14-ARIN" ],
    "date_created" : "2021-06-28",
    "date_updated" : "2021-06-28",
    "source" : "https://rdap.arin.net/registry/autnum/231"
  } ],
  "organization" : {
    "handle" : "MISU",
    "name" : "Michigan State University",
    "address" : [ "IT Services", "450 Auditorium Rd., Suite 400", "East Lansing", "MI", "48824", "US" ],
    "street" : "Auditorium Rd.",
    "city" : "East Lansing",
    "state" : "MI",
    "zip_code" : "48824",
    "country" : [ "US" ],
    "date_created" : "1991-07-24",
    "date_updated" : "2023-10-31",
    "source" : "https://rdap.arin.net/registry/entity/MISU",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "DTS21-ARIN",
    "name" : "DNS Technical Support",
    "email" : [ "dnstech@msu.edu" ],
    "phone" : [ "+1-517-432-6200" ],
    "source" : "https://rdap.arin.net/registry/entity/DTS21-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ATS14-ARIN",
    "name" : "Abuse Technical Support",
    "email" : [ "abuse@msu.edu" ],
    "phone" : [ "+1-517-432-6200" ],
    "source" : "https://rdap.arin.net/registry/entity/ATS14-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS237	Merit Network Inc.	US
AS11537	Internet2	US
AS11164	Internet2	US
AS229	Merit Network Inc.	US

Upstreams

AS Number	Description	Country
AS237	Merit Network Inc.	US
AS11537	Internet2	US
AS11164	Internet2	US

Downstreams

AS Number	Description	Country
AS229	Merit Network Inc.	US

Contacts

Email Contacts

dnstech@msu.edu

Abuse Contacts

abuse@msu.edu