Autonomous system
AS28251 Cizol Com. e Servicos de Equip de Informatica Ltda
Unclassified LACNIC
Summary
Cizol
business static brazil small
AS28251 is operated by Cizol Com. e Serviços de Equip de Informatica Ltda.
What it's used for
- The address space carries static infrastructure, as evidenced by reverse DNS records consistently ending in
.STATIC.cizol.com.br. - The AS announces 4096 IPv4 addresses across 4 prefixes, with only 1 observed neighbour, indicating a small, self-contained network rather than a transit provider.
Notable
- All registrants match the announcer, identified as Cizol Com. e Serviços de Equip de Informatica Ltda with netname 121570.
- The inventory consists of four contiguous IPv4 blocks within the 187.1.0.0/16 range, specifically 187.1.144.0/21, 187.1.156.0/22, 187.1.152.0/23, and 187.1.154.0/23.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS28186 | ITS TELECOMUNICACOES LTDA | 124 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 4 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2008-09-18
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS28251
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 31 naming AS28251
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 1,772 prefixes, as published 2026-10-15. 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