Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS40016

Announcement observedARIN

MESIROW FINANCIAL HOLDINGS, INC. · MESIROW

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/3/2026, 08:16:37Snapshot expired

View network topology RDAP registration

ASN: AS40016
Registration country: United States
Name: MESIROW FINANCIAL HOLDINGS, INC.
Abbreviation: MESIROW
Registration date: 6/7/2006, 19:24:52
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
204.153.74.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/12/2026, 08:00:00	✓	×	Historical record
207.252.173.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/12/2026, 08:00:00	✓	×	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: MESIROW FINANCIAL HOLDINGS, INC.
RIR: ARIN
Registration country: United States
Registration date: 6/7/2006, 19:24:52
Abuse contact: perry.rhone@mesirow.com

Snapshot trend

10/3/2026, 08:16:372 v40 v63 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn