asn.dev

Autonomous system

AS53083 C & M Software Ltda.

Unclassified RIPE

IPv4 addresses 4.10K 6 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly BR
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

C & M Software Ltda.

Brazil · AI-generated

business brazil ipv4

AS53083 is held by C & M Software Ltda.

What it's used for

  • The address space is registered under the netname 136061 for all available prefixes, indicating a single corporate entity managing the inventory.
  • The AS announces 4096 IPv4 addresses across 6 prefixes, all located in Brazil, while maintaining only 2 observed routing neighbours.
  • This low neighbour count relative to the address block size suggests the network functions as a business or internal corporate estate rather than a transit provider or large-scale residential ISP.

Notable

  • Registrant data for the available prefixes consistently lists C & M Software Ltda. as the holder, matching the AS holder.
  • The address inventory consists of contiguous blocks within the 187.33.112.0/21 range, including a /21, a /22, and four /24s.
  • The organisation is a Brazilian software company established in 1999, based in Barueri, São Paulo.

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
AS4230CLARO S.A.391
AS17222MUNDIVOX DO BRASIL LTDA140

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 6 prefixes · 4.10K addresses IPv6 0 prefixes

CountryNamePrefixes
BRBrazil6

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
53083
Registry name
ASN53083
Registrant
C & M Software Ltda.
Abuse contact
dominio@cmsw.com
Registered
2009-10-14
Last changed
2023-08-21
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 9 with no ROA
ROAs
0 authorising AS53083
ASPA
no ASPA record
IRR
100% registered · 9 of 9 announcements
Route objects
10 naming AS53083

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 1,778 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