What is ASN AS266300?

ASN AS266300 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS266300?

AS266300 is listed under FUSAO TELECOM LTDA. ME.

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.

AS266300 FUSAO TELECOM LTDA. ME

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Legacy Routes

FUSAO TELECOM LTDA. ME bierende.com.br

BR 13 Routes

AS Data

AS266300

AS266300 – FUSAO TELECOM LTDA. ME

AS Number	266300
AS Name	24.063.333/0001-28
Organization	FUSAO TELECOM LTDA. ME
Country	BR
Website	bierende.com.br
Number of IPv4 Routes	6
Number of IPv6 Routes	7
ASN type	ISP
Registry	lacnic
Date Allocated	2016-10-14

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Use ASN data for AS266300 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
170.79.189.0/24	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	256
2804:35ac::/32	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~79×10²⁷
2804:35ac:8000::/34	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~20×10²⁷
2804:35ac:4000::/34	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~20×10²⁷
2804:35ac::/33	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~40×10²⁷
170.79.190.0/24	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	256
170.79.190.0/23	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	512
170.79.188.0/23	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	512
2804:35ac:8000::/33	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~40×10²⁷
2804:35ac:c000::/34	AS266300	FUSAO TELECOM LTDA. ME	FUSAO TELECOM LTDA. - ME	~20×10²⁷

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.
% 2026-04-25T09:25:31-03:00 - 152.39.197.80

aut-num:     AS266300
owner:       FUSAO TELECOM LTDA. - ME
ownerid:     24.063.333/0001-28
responsible: JOAO CARLOS BIERENDE
country:     BR
owner-c:     JCB433
routing-c:   JCB433
abuse-c:     JCB433
created:     20161014
changed:     20161014
inetnum:     170.79.188.0/22
inetnum:     2804:35ac::/32

nic-hdl-br:  JCB433
person:      Joao Carlos Bierende
e-mail:      joao@bierende.com.br
country:     BR
created:     20040805
changed:     20240305

% 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" : "AS266300",
    "country" : "BR",
    "admin_contacts" : [ "JCB433" ],
    "tech_contacts" : [ "JCB433" ],
    "abuse_contacts" : [ "JCB433" ],
    "date_created" : "2016-10-14",
    "date_updated" : "2016-10-14",
    "source" : "lacnic"
  } ],
  "organization" : {
    "handle" : "24.063.333/0001-28",
    "name" : "FUSAO TELECOM LTDA. - ME",
    "country" : [ "BR" ],
    "abuse_contacts" : [ "JCB433" ],
    "date_created" : "2016-10-14",
    "date_updated" : "2016-10-14",
    "source" : "lacnic"
  },
  "administrative_contacts" : [ {
    "handle" : "JCB433",
    "country" : "BR",
    "email" : [ "joao@bierende.com.br" ],
    "date_created" : "2004-08-05",
    "date_updated" : "2024-03-05",
    "source" : "lacnic"
  } ],
  "technical_contacts" : [ {
    "handle" : "JCB433",
    "country" : "BR",
    "email" : [ "joao@bierende.com.br" ],
    "date_created" : "2004-08-05",
    "date_updated" : "2024-03-05",
    "source" : "lacnic"
  } ],
  "abuse_contacts" : [ {
    "handle" : "JCB433",
    "country" : "BR",
    "email" : [ "joao@bierende.com.br" ],
    "date_created" : "2004-08-05",
    "date_updated" : "2024-03-05",
    "source" : "lacnic"
  } ]
}

Peers

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS24482	SG.GS	SG
AS263152	MIGO TELECOM	BR
AS53062	ALT \| GRUPO BRASIL TECPAR	BR
AS14840	BR.Digital Telecom	BR
AS263237	PowerHost Telecom SPA	CL
AS61573	IP TELECOM	BR
AS22548	Núcleo de Inf. e Coord. do Ponto BR - NIC.BR	BR
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS53062	ALT GRUPO BRASIL TECPAR	BR

Upstreams

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS35280	F5 Networks SARL	FR
AS14840	BR.Digital Telecom	BR
AS16735	ALGAR TELECOM S/A	BR
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS53062	ALT GRUPO BRASIL TECPAR	BR

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ASN Summary

AS266300 – FUSAO TELECOM LTDA. ME

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