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.

AS36661 CFI Partners, LLC | IPGeolocation.io

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

CFI Partners, LLC cfipartners.com

US 1 Routes

AS Data

AS36661

AS36661 – CFI Partners, LLC

AS Number	36661
AS Name	CHICAGO-FUNDAMENTAL-INVESTMENT-PARTNERS
Organization	CFI Partners, LLC (cfipl)
Country	US
Website	cfipartners.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-03-09

ASN Intelligence API for production workflows

Use ASN data for AS36661 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
38.98.129.0/24	AS36661	CFI Partners, LLC	Chicago Fundamental Investment Partners LLC	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:       36661
ASName:         CHICAGO-FUNDAMENTAL-INVESTMENT-PARTNERS
ASHandle:       AS36661
RegDate:        2006-03-09
Updated:        2012-03-02
Ref:            https://rdap.arin.net/registry/autnum/36661


OrgName:        CFI Partners, LLC
OrgId:          CFIPL
Address:        1 S. Wacker Drive, Suite 3500
City:           Chicago
StateProv:      IL
PostalCode:     60606
Country:        US
RegDate:        2006-02-27
Updated:        2023-11-16
Ref:            https://rdap.arin.net/registry/entity/CFIPL


OrgTechHandle: DAB81-ARIN
OrgTechName:   Becker, David Alan
OrgTechPhone:  +1-312-416-4300 
OrgTechEmail:  dbecker@cfipartners.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DAB81-ARIN

OrgAbuseHandle: DAB81-ARIN
OrgAbuseName:   Becker, David Alan
OrgAbusePhone:  +1-312-416-4300 
OrgAbuseEmail:  dbecker@cfipartners.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DAB81-ARIN

OrgNOCHandle: DAB81-ARIN
OrgNOCName:   Becker, David Alan
OrgNOCPhone:  +1-312-416-4300 
OrgNOCEmail:  dbecker@cfipartners.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/DAB81-ARIN

RTechHandle: HKM-ARIN
RTechName:   MOHAMMED, HARES KHAN
RTechPhone:  +1-312-770-1739 
RTechEmail:  HARESM@infiniumcm.com
RTechRef:    https://rdap.arin.net/registry/entity/HKM-ARIN

RAbuseHandle: HKM-ARIN
RAbuseName:   MOHAMMED, HARES KHAN
RAbusePhone:  +1-312-770-1739 
RAbuseEmail:  HARESM@infiniumcm.com
RAbuseRef:    https://rdap.arin.net/registry/entity/HKM-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" : "36661",
    "as_handle" : "AS36661",
    "as_name" : "CHICAGO-FUNDAMENTAL-INVESTMENT-PARTNERS",
    "tech_contacts" : [ "DAB81-ARIN", "HKM-ARIN" ],
    "abuse_contacts" : [ "DAB81-ARIN", "HKM-ARIN" ],
    "date_created" : "2006-03-09",
    "date_updated" : "2012-03-02",
    "source" : "https://rdap.arin.net/registry/autnum/36661"
  } ],
  "organization" : {
    "handle" : "CFIPL",
    "name" : "CFI Partners, LLC",
    "address" : [ "1 S. Wacker Drive, Suite 3500", "Chicago", "IL", "60606", "US" ],
    "street" : "S. Wacker Drive",
    "city" : "Chicago",
    "state" : "IL",
    "zip_code" : "60606",
    "country" : [ "US" ],
    "date_created" : "2006-02-27",
    "date_updated" : "2023-11-16",
    "source" : "https://rdap.arin.net/registry/entity/CFIPL",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "DAB81-ARIN",
    "name" : "Becker, David Alan",
    "email" : [ "dbecker@cfipartners.com" ],
    "phone" : [ "+1-312-416-4300" ],
    "source" : "https://rdap.arin.net/registry/entity/DAB81-ARIN"
  }, {
    "handle" : "HKM-ARIN",
    "name" : "MOHAMMED, HARES KHAN",
    "email" : [ "HARESM@infiniumcm.com" ],
    "phone" : [ "+1-312-770-1739" ],
    "source" : "https://rdap.arin.net/registry/entity/HKM-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "DAB81-ARIN",
    "name" : "Becker, David Alan",
    "email" : [ "dbecker@cfipartners.com" ],
    "phone" : [ "+1-312-416-4300" ],
    "source" : "https://rdap.arin.net/registry/entity/DAB81-ARIN"
  }, {
    "handle" : "HKM-ARIN",
    "name" : "MOHAMMED, HARES KHAN",
    "email" : [ "HARESM@infiniumcm.com" ],
    "phone" : [ "+1-312-770-1739" ],
    "source" : "https://rdap.arin.net/registry/entity/HKM-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS1239	Cogent Communications, LLC	US
AS6079	RCN	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS6079	RCN	US
AS174	Cogent Communications, LLC	US

Frequently Asked Questions

What is ASN AS36661?

ASN AS36661 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS36661?

AS36661 is listed under CFI Partners, LLC.

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.