What is ASN AS263944?

ASN AS263944 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS263944?

AS263944 is listed under FiberNet Telecomunicacoes.

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.

AS263944 FiberNet Telecomunicacoes

ASN Lookup Tool

FiberNet Telecomunicacoes

BR 4 Routes

AS Data

AS263944

AS263944 – FiberNet Telecomunicacoes

AS Number	263944
AS Name
Organization	FiberNet Telecomunicacoes
Country	BR
Number of IPv4 Routes	3
Number of IPv6 Routes	1
ASN type	ISP
Registry	lacnic
Date Allocated	2015-08-19

ASN Intelligence API for production workflows

Use ASN data for AS263944 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
138.219.108.0/22	AS263944	FiberNet Telecomunicacoes	FiberNet Telecomunicacoes	1024
138.219.108.0/23	AS263944	FiberNet Telecomunicacoes	FiberNet Telecomunicacoes	512
138.219.110.0/23	AS263944	FiberNet Telecomunicacoes	FiberNet Telecomunicacoes	512
2804:2828::/32	AS263944	FiberNet Telecomunicacoes	FiberNet Telecomunicacoes	~79×10²⁷

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.
% 2026-06-01T14:07:05-03:00 - 194.135.133.82

aut-num:     AS263944
owner:       FiberNet Telecomunicacoes
responsible: FiberNet Telecom
owner-c:     SLDSA78
routing-c:   SLDSA78
abuse-c:     SLDSA78
created:     20150819
changed:     20150819
inetnum:     138.219.108.0/22
inetnum:     2804:2828::/32

nic-hdl-br:  SLDSA78
person:      shirlei lima dos santos
created:     20120523
changed:     20250312

% 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.
 % 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.
% 2026-05-31T10:52:32-03:00 - 134.199.87.209

aut-num:     AS263944
owner:       FiberNet Telecomunicacoes
responsible: FiberNet Telecom
owner-c:     SLDSA78
routing-c:   SLDSA78
abuse-c:     SLDSA78
created:     20150819
changed:     20150819
inetnum:     138.219.108.0/22
inetnum:     2804:2828::/32

nic-hdl-br:  SLDSA78
person:      shirlei lima dos santos
created:     20120523
changed:     20250312

% 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.
 % 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.
% 2026-05-30T09:53:39-03:00 - 93.114.5.246

aut-num:     AS263944
owner:       FiberNet Telecomunicacoes
responsible: FiberNet Telecom
owner-c:     SLDSA78
routing-c:   SLDSA78
abuse-c:     SLDSA78
created:     20150819
changed:     20150819
inetnum:     138.219.108.0/22
inetnum:     2804:2828::/32

nic-hdl-br:  SLDSA78
person:      shirlei lima dos santos
created:     20120523
changed:     20250312

% 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.
 % 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.
% 2026-05-29T09:21:34-03:00 - 119.13.213.144

aut-num:     AS263944
owner:       FiberNet Telecomunicacoes
responsible: FiberNet Telecom
owner-c:     SLDSA78
routing-c:   SLDSA78
abuse-c:     SLDSA78
created:     20150819
changed:     20150819
inetnum:     138.219.108.0/22
inetnum:     2804:2828::/32

nic-hdl-br:  SLDSA78
person:      shirlei lima dos santos
created:     20120523
changed:     20250312

% 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" : "AS263944",
    "admin_contacts" : [ "SLDSA78" ],
    "tech_contacts" : [ "SLDSA78" ],
    "abuse_contacts" : [ "SLDSA78" ],
    "date_created" : "2015-08-19",
    "date_updated" : "2015-08-19",
    "source" : "lacnic"
  }, {
    "aut_num" : "AS263944",
    "admin_contacts" : [ "SLDSA78" ],
    "tech_contacts" : [ "SLDSA78" ],
    "abuse_contacts" : [ "SLDSA78" ],
    "date_created" : "2015-08-19",
    "date_updated" : "2015-08-19",
    "source" : "lacnic"
  }, {
    "aut_num" : "AS263944",
    "admin_contacts" : [ "SLDSA78" ],
    "tech_contacts" : [ "SLDSA78" ],
    "abuse_contacts" : [ "SLDSA78" ],
    "date_created" : "2015-08-19",
    "date_updated" : "2015-08-19",
    "source" : "lacnic"
  }, {
    "aut_num" : "AS263944",
    "admin_contacts" : [ "SLDSA78" ],
    "tech_contacts" : [ "SLDSA78" ],
    "abuse_contacts" : [ "SLDSA78" ],
    "date_created" : "2015-08-19",
    "date_updated" : "2015-08-19",
    "source" : "lacnic"
  } ],
  "organization" : {
    "name" : "FiberNet Telecomunicacoes",
    "abuse_contacts" : [ "SLDSA78" ],
    "date_created" : "2015-08-19",
    "date_updated" : "2015-08-19",
    "source" : "lacnic"
  },
  "administrative_contacts" : [ {
    "handle" : "SLDSA78",
    "date_created" : "2012-05-23",
    "date_updated" : "2025-03-12",
    "source" : "lacnic"
  } ],
  "technical_contacts" : [ {
    "handle" : "SLDSA78",
    "date_created" : "2012-05-23",
    "date_updated" : "2025-03-12",
    "source" : "lacnic"
  } ],
  "abuse_contacts" : [ {
    "handle" : "SLDSA78",
    "date_created" : "2012-05-23",
    "date_updated" : "2025-03-12",
    "source" : "lacnic"
  } ]
}

Peers

AS Number	Description	Country
AS53062	ALT \| GRUPO BRASIL TECPAR	BR
AS267695	FLY NET S.R.L.	AR
AS265661	Fernando German Fischer (FIBERNET TELECOM)	AR
AS53062	ALT GRUPO BRASIL TECPAR	BR
AS265661	Fernando German Fischer FIBERNET TELECOM	AR

Upstreams

AS Number	Description	Country
AS53062	ALT GRUPO BRASIL TECPAR	BR

Downstreams

AS Number	Description	Country
AS267695	FLY NET S.R.L.	AR
AS265661	Fernando German Fischer FIBERNET TELECOM	AR