asn.dev

Autonomous system

AS40167 SCHIFFRINBARROWAY - Schiffrin & Barroway, LLP

Unclassified ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Schiffrin & Barroway, LLP

United States of America · AI-generated

legal corporate leased

The AS handle SCHIFFRINBARROWAY is held by Schiffrin & Barroway, LLP.

What it's used for

  • The single announced prefix 38.98.252.0/24 carries the netname COGENT-A with registrant Cogent Communications, LLC, indicating the address space is leased from Cogent.
  • The AS announces 256 IPv4 addresses across 1 prefix and maintains 2 observed neighbours, a ratio consistent with a small corporate or office network rather than a transit or access provider.
  • Traffic from this AS consists of office workers and internal corporate endpoints for a shareholder litigation and class action law firm.

Notable

  • The RDAP registrant for the announced prefix is Cogent Communications, LLC, which differs from the AS holder Schiffrin & Barroway, LLP, confirming the use of leased address space.
  • Secondary sources indicate the firm changed its name to Barroway Topaz Kessler Meltzer & Check, LLP, though the AS registry still reflects the original name.
  • The address inventory consists of a single /24 block with no IPv6 prefixes, representing a minimal footprint for a professional services firm.

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

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS30372Crown Castle Fiber LLC35
AS174Cogent Communications, LLC26

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-13, 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 · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS40167
Registry name
SCHIFFRINBARROWAY
Registrant
Schiffrin & Barroway, LLP
Abuse contact
awells@ktmc.com
Registered
2006-08-07
Last changed
2020-04-17
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS40167
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS40167

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: 455 networks and 1,849 prefixes, as published 2026-11-13. 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