asn.dev

Autonomous system

AS19858 GENSLER

Unclassified APNIC

IPv4 addresses 512 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Gensler

United States of America · AI-generated

business architecture corporate

The AS handle GENSLER is held by M. Arthur Gensler Jr. & Associates, Inc.

What it's used for

  • The address space carries corporate infrastructure for a global architecture and design firm, evidenced by the netname GAA and the reverse DNS record www.nabic.org.
  • The AS announces 512 IPv4 addresses within a single prefix (64.239.72.0/23) and maintains 3 observed neighbours, a ratio consistent with a small internal corporate estate rather than a transit or access provider.

Notable

  • The RDAP registrant M. Arthur Gensler Jr. & Associates, Inc. aligns directly with the AS holder and the netname GAA.
  • The address inventory consists of a single /23 block, indicating a compact, self-contained network footprint typical of a large private enterprise.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS174Cogent Communications, LLC101
AS6994Fastmetrics11
AS7018AT&T Enterprises, LLC4

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS19858
Registry name
GENSLER
Registrant
M. Arthur Gensler Jr. & Associates, Inc.
Abuse contact
matthew_baltera@gensler.com
Registered
2001-02-21
Last changed
2025-06-30
Allocation
assigned

Declared

PeeringDB profile

self-reported
Name
GENSLER
Scope
Not Disclosed
Traffic ratio
Not Disclosed

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 2 valid, 0 with no ROA
ROAs
2 authorising AS19858
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS19858

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 443 networks and 1,779 prefixes, as published 2026-10-24. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check