asn.dev

Autonomous system

AS63153 STEWART-STEVENSON

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

Stewart & Stevenson

United States of America · AI-generated

business industrial corporate

The AS handle STEWART-STEVENSON is held by Stewart & Stevenson LLC.

What it's used for

  • The address space carries corporate infrastructure, evidenced by the netname SSLLC and registrant Stewart & Stevenson LLC.
  • The AS announces 256 IPv4 addresses within a single prefix (204.126.230.0/24) and maintains 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.
  • Traffic from this AS consists of internal corporate communications for an industrial manufacturer and distributor serving the oil and gas, marine, construction, and power generation sectors.

Notable

  • The RDAP registrant Stewart & Stevenson LLC aligns perfectly with the AS holder and the netname SSLLC.
  • Stewart & Stevenson is a subsidiary of Kirby Corporation, a major industrial equipment manufacturer.
  • The inventory consists of a single /24 block, representing a standard corporate allocation with no IPv6 prefixes announced.

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
AS22442Phonoscope, Inc.41
AS35847Ezee Fiber16

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, 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
AS63153
Registry name
STEWART-STEVENSON
Registrant
Stewart & Stevenson LLC
Abuse contact
k.chapman@ssss.com
Registered
2014-08-15
Last changed
2014-08-15
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS63153
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS63153

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: 442 networks and 1,783 prefixes, as published 2026-10-20. 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