ASN AS28605 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS28605?

AS28605 is listed under Defferrari Informatica Ltda..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS28605 Defferrari Informatica Ltda.

ASN Lookup Tool

Defferrari Informatica Ltda. registro.defferrari.com.br

BR 21 Routes

AS Data

AS28605

AS28605 – Defferrari Informatica Ltda.

AS Number	28605
AS Name	94.966.306/0001-40
Organization	Defferrari Informatica Ltda.
Country	BR
Website	registro.defferrari.com.br
Number of IPv4 Routes	19
Number of IPv6 Routes	2
ASN type	BUSINESS
Registry	lacnic
Date Allocated	2005-07-26

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Use ASN data for AS28605 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
179.127.114.0/23	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	512
2804:3c0::/32	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	~79×10²⁷
201.20.158.0/23	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	512
201.20.144.0/22	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	1024
201.20.152.0/21	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	2048
201.20.152.0/22	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	1024
201.20.148.0/22	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	1024
201.20.156.0/22	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	1024
2804:3c0:8001::/48	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	~1×10²⁴
201.20.144.0/20	AS28605	Defferrari Informatica Ltda.	Defferrari Informatica Ltda.	4096

Raw Whois Response

% Copyright (c) Nic.br - Use of this data is governed by the Use and
% Privacy Policy at https://registro.br/upp . Distribution,
% commercialization, reproduction, and use for advertising or similar
% purposes are expressly prohibited.
% 2026-04-10T09:19:42-03:00 - 45.134.77.221

aut-num:     AS28605
owner:       Defferrari Informatica Ltda.
ownerid:     94.966.306/0001-40
responsible: Marco Defferrari
country:     BR
owner-c:     MAD6
routing-c:   MAD6
abuse-c:     MAD6
created:     20050726
changed:     20130306
inetnum:     201.20.144.0/20
inetnum:     2804:3c0::/32
inetnum:     179.127.112.0/22

nic-hdl-br:  MAD6
person:      Marco Defferrari
e-mail:      registro@registro.defferrari.com.br
country:     BR
created:     19971230
changed:     20220207

% Security and mail abuse issues should also be addressed to cert.br,
% respectivelly to cert@cert.br and mail-abuse@cert.br
%
% whois.registro.br only accepts exact match queries for domains,
% registrants, contacts, tickets, providers, IPs, and ASNs.

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.lacnic.net",
  "aut_nums" : [ {
    "aut_num" : "AS28605",
    "country" : "BR",
    "admin_contacts" : [ "MAD6" ],
    "tech_contacts" : [ "MAD6" ],
    "abuse_contacts" : [ "MAD6" ],
    "date_created" : "2005-07-26",
    "date_updated" : "2013-03-06",
    "source" : "lacnic"
  } ],
  "organization" : {
    "handle" : "94.966.306/0001-40",
    "name" : "Defferrari Informatica Ltda.",
    "country" : [ "BR" ],
    "abuse_contacts" : [ "MAD6" ],
    "date_created" : "2005-07-26",
    "date_updated" : "2013-03-06",
    "source" : "lacnic"
  },
  "administrative_contacts" : [ {
    "handle" : "MAD6",
    "country" : "BR",
    "email" : [ "registro@registro.defferrari.com.br" ],
    "date_created" : "1997-12-30",
    "date_updated" : "2022-02-07",
    "source" : "lacnic"
  } ],
  "technical_contacts" : [ {
    "handle" : "MAD6",
    "country" : "BR",
    "email" : [ "registro@registro.defferrari.com.br" ],
    "date_created" : "1997-12-30",
    "date_updated" : "2022-02-07",
    "source" : "lacnic"
  } ],
  "abuse_contacts" : [ {
    "handle" : "MAD6",
    "country" : "BR",
    "email" : [ "registro@registro.defferrari.com.br" ],
    "date_created" : "1997-12-30",
    "date_updated" : "2022-02-07",
    "source" : "lacnic"
  } ]
}

Peers

AS Number	Description	Country
AS264274	DSP RS TELECOMUNICAES LTDA.	BR
AS263152	MIGO TELECOM	BR
AS267668	Gigaweb Tecnologia	BR
AS61615	FALE S.A.	BR
AS262589	SAMM TECNOLOGIA E TELECOMUNICACOES S.A	BR
AS272554	Log-Fi Internet	BR
AS28584	Defferrari Solucoes em Internet Ltda	BR
AS28343	UNIFIQUE TELECOMUNICACOES S/A	BR
AS53013	UFINET BRASIL S.A.	BR
AS267256	ONETIS TECNOLOGIA LTDA	BR

Upstreams

AS Number	Description	Country
AS61568	ALOO TELECOM FSF TECNOLOGIA SA	BR
AS264409	GRUPO YAX	BR
AS13786	Seabras 1 USA, LLC	US
AS26615	TIM S/A	BR
AS14840	BR.Digital Telecom	BR
AS1031	PEER 1031 LLC	US
AS28283	Adylnet Telecom	BR
AS52838	WN TELECOM LTDA ME	BR
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS3356	Level 3 Parent, LLC	US

Downstreams

AS Number	Description	Country
AS268843	CDNTV TECNOLOGIA LTDA	BR
AS273420	Misternet internet Ltda	BR
AS22128	Defferrari Solucoes em Internet Ltda	BR
AS267668	Gigaweb Tecnologia	BR
AS61615	FALE S.A.	BR
AS269068	Plus Networks	BR
AS28584	Defferrari Solucoes em Internet Ltda	BR
AS268516	Midia Net Telecom	BR
AS61930	Telecomunicações Riograndense Ltda	BR
AS264920	Shel Net Informatica Ltda	BR