Autonomous system profile

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

AS19858

Announcement observedARIN

M. Arthur Gensler Jr. & Associates, Inc. · GENSLER

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

Last active10/1/2026, 03:50:58Snapshot expired

View network topology RDAP registration

ASN: AS19858
Registration country: United States
Name: M. Arthur Gensler Jr. & Associates, Inc.
Abbreviation: GENSLER
Registration date: 2/21/2001, 05:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
64.239.72.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 00:00:00	10/1/2026, 00:00:00	✓	×	Historical record
64.239.73.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 00:00:00	10/1/2026, 00:00:00	✓	×	Historical record

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

Registration and sources

Organization: M. Arthur Gensler Jr. & Associates, Inc.
RIR: ARIN
Registration country: United States
Registration date: 2/21/2001, 05:00:00
Abuse contact: matthew_baltera@gensler.com

Snapshot trend

10/1/2026, 03:50:582 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