Autonomous system
AS52636 AS52636 - CESB-Centro de Educacao Superior de Brasilia LTDA
Unclassified APNIC
Summary
CESB
education business brazil
AS52636 is operated by CESB-Centro de Educacao Superior de Brasilia LTDA.
What it's used for
- The address space carries the institutional network for a higher education institution, evidenced by the registrant name and the associated domain
iesb.br. - The AS announces 256 IPv4 addresses within a single /24 prefix (186.251.61.0/24) and maintains 2 observed neighbours, a ratio consistent with a small, self-contained site network rather than a transit or large access provider.
- Traffic from this AS consists of internal institutional data, including administrative systems, student access, and research endpoints for the university.
Notable
- The RDAP registrant for the announced prefix matches the AS holder exactly, confirming direct ownership of the address space.
- The inventory is compact, consisting of a single contiguous /24 block 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
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 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 1 |
Registry
Allocation record
- Registry
- APNIC
- Handle
52636- Registry name
- ASN52636
- Registrant
- CESB-Centro de Educacao Superior de Brasilia LTDA
- Abuse contact
- rede@iesb.br
- Registered
- 2013-04-09
- Last changed
- 2013-04-09
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS52636
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS52636
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: 449 networks and 1,846 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