Autonomous system
AS19311 STEWART-1
Unclassified ARIN
Summary
Stewart Title
business title corporate us
STEWART-1 is the autonomous system for Stewart Title.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by the netname
STEWARTand registrantStewart Titleon both announced prefixes. - The AS announces 2304 IPv4 addresses across 2 prefixes (
199.253.16.0/21and199.253.25.0/24) while maintaining only 4 observed neighbours, a ratio indicative of a small, self-contained corporate estate rather than a transit or access provider.
Notable
- The RDAP registrants for both prefixes are
Stewart Title, which aligns perfectly with the AS holder and the registry handleSTEWART-1. - The inventory consists of a single /21 block and a single /24 block, both located in the United States, reflecting a finely subdivided internal network typical of a large 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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 2.30K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19311- Registry name
- STEWART-1
- Registrant
- Stewart Title
- Abuse contact
- telcoops@stewart.com
- Registered
- 2000-12-15
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 9 with no ROA
- ROAs
- 0 authorising AS19311
- ASPA
- no ASPA record
- IRR
- 100% registered · 9 of 9 announcements
- Route objects
- 9 naming AS19311
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: 447 networks and 1,849 prefixes, as published 2026-10-30. 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