Autonomous system
AS28203 AS28203 - Webcenter Sist Prest de Servicos de Informatica
Unclassified APNIC
Summary
Webcenter Sistemas
business brazil it-services
AS28203 is operated by Webcenter Sistemas, a Brazilian information technology services provider.
What it's used for
- The address space carries corporate IT infrastructure, evidenced by reverse DNS entries pointing to
birdsnet.net.brandconnexion.com.br, as well as a test hosttestericardo.birdsnet.net.br. - The AS announces 3840 IPv4 addresses across 7 prefixes with only 1 observed neighbour, indicating a small, self-contained business network rather than a transit or large-scale access provider.
Notable
- Registrants are consistent with the announcer, appearing as "Webcenter Sistemas - Prest. Servic Informatica Ltd" and "Webcenter Sist Prest de Servicos de Informatica" across all listed prefixes.
- The inventory consists of a contiguous block within the 189.91.32.0/20 range, subdivided into /22, /23, and /24 prefixes, typical of a corporate estate managing internal site segmentation.
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 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 3.84K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 4 |
Registry
Allocation record
- Registry
- APNIC
- Handle
28203- Registry name
- ASN28203
- Registrant
- Webcenter Sist Prest de Servicos de Informatica
- Abuse contact
- Ricardo Buchalla Auada
- Registered
- 2008-04-10
- Last changed
- 2013-03-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS28203
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 8 naming AS28203
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 1,843 prefixes, as published 2026-11-02. 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