AS40016 MESIROW FINANCIAL HOLDINGS, INC.

• IPv4 Prefixes

Country	Announced Prefix	Description	Valid ROA	Parent Prefix	RIR
	204.153.74.0/24	Mesirow Financial		203.247.224.0/19	APNIC
	207.252.173.0/24	Mesirow Financial		207.252.0.0/16	ARIN

• IPv4 Peers

Country	ASN	Name	Description
	AS3356	LEVEL3	Level 3 Parent, LLC
	AS174	COGENT-174	Cogent Communications
	AS23352	SERVERCENTRAL	DEFT.COM

• IPv4 Upstreams

Country	ASN	Name	Description
	AS23352	SERVERCENTRAL	DEFT.COM
	AS174	COGENT-174	Cogent Communications
	AS3356	LEVEL3	Level 3 Parent, LLC

IPv4 Upstream Graph

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IPv4 Upstream Graph

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#
# 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 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber:       40016
ASName:         MESIROW
ASHandle:       AS40016
RegDate:        2006-06-07
Updated:        2006-06-07    
Ref:            https://rdap.arin.net/registry/autnum/40016


OrgName:        MESIROW FINANCIAL HOLDINGS, INC.
OrgId:          MFH-7
Address:        350 N CLARK ST
City:           CHICAGO
StateProv:      IL
PostalCode:     60610
Country:        US
RegDate:        2006-05-18
Updated:        2014-10-28
Ref:            https://rdap.arin.net/registry/entity/MFH-7


OrgTechHandle: PDO24-ARIN
OrgTechName:   Dockins, Paul 
OrgTechPhone:  +1-312-595-6943 
OrgTechEmail:  pdockins@mesirowfinancial.com
OrgTechRef:    https://rdap.arin.net/registry/entity/PDO24-ARIN

OrgAbuseHandle: PDO24-ARIN
OrgAbuseName:   Dockins, Paul 
OrgAbusePhone:  +1-312-595-6943 
OrgAbuseEmail:  pdockins@mesirowfinancial.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/PDO24-ARIN

OrgTechHandle: PL345-ARIN
OrgTechName:   Letarte, Phil 
OrgTechPhone:  +1-312-595-6258 
OrgTechEmail:  pletarte@mesirowfinancial.com
OrgTechRef:    https://rdap.arin.net/registry/entity/PL345-ARIN

OrgTechHandle: STEVE130-ARIN
OrgTechName:   Wiley, Steven A
OrgTechPhone:  +1-312-595-6258 
OrgTechEmail:  pletarte@mesirowfinancial.com
OrgTechRef:    https://rdap.arin.net/registry/entity/STEVE130-ARIN

RTechHandle: PL345-ARIN
RTechName:   Letarte, Phil 
RTechPhone:  +1-312-595-6258 
RTechEmail:  pletarte@mesirowfinancial.com
RTechRef:    https://rdap.arin.net/registry/entity/PL345-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 1997-2025, American Registry for Internet Numbers, Ltd.
#