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AS23397 Chicago Mercantile Exchange

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

Chicago Mercantile Exchange cmegroup.com

US 2 Routes

AS Data

AS23397

AS23397 – Chicago Mercantile Exchange

AS Number	23397
AS Name	CME-VEN-AS23397
Organization	Chicago Mercantile Exchange (cme)
Country	US
Website	cmegroup.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2002-03-12

ASN Intelligence API for production workflows

Use ASN data for AS23397 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
167.204.37.0/24	AS23397	Chicago Mercantile Exchange	Chicago Mercantile Exchange	256
204.10.10.0/24	AS23397	Chicago Mercantile Exchange	NEW YORK MERCANTILE EXCHANGE	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:       23397
ASName:         CME-VEN-AS23397
ASHandle:       AS23397
RegDate:        2002-03-12
Updated:        2026-04-15
Ref:            https://rdap.arin.net/registry/autnum/23397


OrgName:        Chicago Mercantile Exchange
OrgId:          CME
Address:        20. South Wacker
City:           Chicago
StateProv:      IL
PostalCode:     60606
Country:        US
RegDate:        1994-06-02
Updated:        2022-03-30
Ref:            https://rdap.arin.net/registry/entity/CME


OrgTechHandle: CMEAR-ARIN
OrgTechName:   CME-ARIN-Admin
OrgTechPhone:  +1-312-627-4496 
OrgTechEmail:  NetworkEngineering@cmegroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CMEAR-ARIN

OrgNOCHandle: NETWO8732-ARIN
OrgNOCName:   Network Operations
OrgNOCPhone:  +1-312-627-4496 
OrgNOCEmail:  networkoperations@cmegroup.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO8732-ARIN

OrgAbuseHandle: CMEAR-ARIN
OrgAbuseName:   CME-ARIN-Admin
OrgAbusePhone:  +1-312-627-4496 
OrgAbuseEmail:  NetworkEngineering@cmegroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CMEAR-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" : "23397",
    "as_handle" : "AS23397",
    "as_name" : "CME-VEN-AS23397",
    "tech_contacts" : [ "CMEAR-ARIN" ],
    "abuse_contacts" : [ "CMEAR-ARIN" ],
    "date_created" : "2002-03-12",
    "date_updated" : "2026-04-15",
    "source" : "https://rdap.arin.net/registry/autnum/23397"
  } ],
  "organization" : {
    "handle" : "CME",
    "name" : "Chicago Mercantile Exchange",
    "address" : [ "20. South Wacker", "Chicago", "IL", "60606", "US" ],
    "city" : "Chicago",
    "state" : "IL",
    "zip_code" : "60606",
    "country" : [ "US" ],
    "date_created" : "1994-06-02",
    "date_updated" : "2022-03-30",
    "source" : "https://rdap.arin.net/registry/entity/CME",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "CMEAR-ARIN",
    "name" : "CME-ARIN-Admin",
    "email" : [ "NetworkEngineering@cmegroup.com" ],
    "phone" : [ "+1-312-627-4496" ],
    "source" : "https://rdap.arin.net/registry/entity/CMEAR-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CMEAR-ARIN",
    "name" : "CME-ARIN-Admin",
    "email" : [ "NetworkEngineering@cmegroup.com" ],
    "phone" : [ "+1-312-627-4496" ],
    "source" : "https://rdap.arin.net/registry/entity/CMEAR-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS6461	Zayo Bandwidth	US

Frequently Asked Questions

What is ASN AS23397?

ASN AS23397 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23397?

AS23397 is listed under Chicago Mercantile Exchange.

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.