ASN AS28573 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS28573?

AS28573 is listed under Claro NXT Telecomunicacoes 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.

AS28573 Claro NXT Telecomunicacoes Ltda

ASN Lookup Tool

Claro NXT Telecomunicacoes Ltda claro.com.br

BR 9150 Routes

AS Data

AS28573

AS28573 – Claro NXT Telecomunicacoes Ltda

AS Number	28573
AS Name	66.970.229/0001-67
Organization	Claro NXT Telecomunicacoes Ltda
Country	BR
Website	claro.com.br
Number of IPv4 Routes	6868
Number of IPv6 Routes	2282
ASN type	ISP
Registry	lacnic
Date Allocated	2003-11-27

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Use ASN data for AS28573 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
191.179.36.0/24	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	256
177.127.36.0/23	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	512
187.64.103.0/24	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	256
2804:14d:1800::/40	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	~309×10²⁴
181.216.80.0/22	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	1024
187.123.248.0/22	AS0		Claro NXT Telecomunicacoes Ltda	1024
191.191.119.0/24	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	256
187.21.96.0/22	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	1024
189.123.32.0/22	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	1024
2804:14c:653c::/48	AS28573	Claro NXT Telecomunicacoes Ltda	Claro NXT Telecomunicacoes Ltda	~1×10²⁴

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.
% 2026-06-26T09:28:19-03:00 - 136.227.180.25

aut-num:     AS28573
owner:       Claro NXT Telecomunicacoes Ltda
ownerid:     66.970.229/0001-67
responsible: Suporte Redes
country:     BR
owner-c:     GRSVI
routing-c:   CADSA1060
abuse-c:     GRSVI
created:     20031127
changed:     20230105
inetnum:     200.189.80.0/20
inetnum:     200.160.96.0/20
inetnum:     201.6.0.0/16
inetnum:     201.17.0.0/16
inetnum:     201.21.0.0/16
inetnum:     201.37.0.0/16
inetnum:     201.52.0.0/15
inetnum:     201.46.240.0/20
inetnum:     201.55.224.0/20
inetnum:     201.62.96.0/19
inetnum:     201.74.0.0/16
inetnum:     201.76.16.0/20
inetnum:     201.80.0.0/14
inetnum:     201.76.64.0/19
inetnum:     201.77.64.0/20
inetnum:     201.94.160.0/19
inetnum:     201.75.0.0/16
inetnum:     189.4.0.0/14
inetnum:     189.29.0.0/16
inetnum:     189.32.0.0/14
inetnum:     189.39.144.0/20
inetnum:     189.54.0.0/15
inetnum:     189.60.0.0/14
inetnum:     189.100.0.0/14
inetnum:     189.120.0.0/14
inetnum:     189.126.16.0/20
inetnum:     187.2.0.0/15
inetnum:     187.20.0.0/14
inetnum:     187.36.0.0/14
inetnum:     187.64.0.0/14
inetnum:     187.104.0.0/14
inetnum:     186.204.0.0/14
inetnum:     186.220.0.0/14
inetnum:     177.32.0.0/14
inetnum:     177.80.0.0/14
inetnum:     2804:14c::/31
inetnum:     177.140.0.0/14
inetnum:     177.180.0.0/14
inetnum:     177.192.0.0/14
inetnum:     179.232.0.0/14
inetnum:     179.208.0.0/14
inetnum:     179.212.0.0/14
inetnum:     179.216.0.0/14
inetnum:     179.220.0.0/14
inetnum:     179.152.0.0/14
inetnum:     179.156.0.0/14
inetnum:     191.176.0.0/14
inetnum:     191.180.0.0/14
inetnum:     191.184.0.0/14
inetnum:     191.188.0.0/14
inetnum:     181.216.0.0/13
inetnum:     187.180.0.0/14
inetnum:     177.235.0.0/16
inetnum:     179.105.0.0/16
inetnum:     181.213.0.0/16
inetnum:     187.255.0.0/16
inetnum:     177.64.0.0/15
inetnum:     187.122.0.0/15
inetnum:     2804:698::/32
inetnum:     177.100.0.0/16
inetnum:     177.127.0.0/16
inetnum:     186.218.0.0/16
inetnum:     189.14.128.0/18
inetnum:     200.170.0.0/18
inetnum:     200.218.32.0/19
inetnum:     200.155.192.0/18
inetnum:     179.136.0.0/14
inetnum:     179.140.0.0/15
inetnum:     179.142.0.0/15

nic-hdl-br:  GRSVI
person:      Grupo de Seguran�a V�rtua
e-mail:      virtua@virtua.com.br
country:     BR
created:     20080512
changed:     20230704

nic-hdl-br:  CADSA1060
person:      Carlos Alberto dos Santos
e-mail:      engenharia.virtua@claro.com.br
country:     BR
created:     20190207
changed:     20191217

% 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" : "AS28573",
    "country" : "BR",
    "admin_contacts" : [ "GRSVI" ],
    "tech_contacts" : [ "CADSA1060" ],
    "abuse_contacts" : [ "GRSVI" ],
    "date_created" : "2003-11-27",
    "date_updated" : "2023-01-05",
    "source" : "lacnic"
  } ],
  "organization" : {
    "handle" : "66.970.229/0001-67",
    "name" : "Claro NXT Telecomunicacoes Ltda",
    "country" : [ "BR" ],
    "abuse_contacts" : [ "GRSVI" ],
    "date_created" : "2003-11-27",
    "date_updated" : "2023-01-05",
    "source" : "lacnic"
  },
  "administrative_contacts" : [ {
    "handle" : "GRSVI",
    "country" : "BR",
    "email" : [ "virtua@virtua.com.br" ],
    "date_created" : "2008-05-12",
    "date_updated" : "2023-07-04",
    "source" : "lacnic"
  } ],
  "technical_contacts" : [ {
    "handle" : "CADSA1060",
    "country" : "BR",
    "email" : [ "engenharia.virtua@claro.com.br" ],
    "date_created" : "2019-02-07",
    "date_updated" : "2019-12-17",
    "source" : "lacnic"
  } ],
  "abuse_contacts" : [ {
    "handle" : "GRSVI",
    "country" : "BR",
    "email" : [ "virtua@virtua.com.br" ],
    "date_created" : "2008-05-12",
    "date_updated" : "2023-07-04",
    "source" : "lacnic"
  } ]
}

Peers

AS Number	Description	Country
AS199081	Lancom Ltd.	GR
AS7195	EDGEUNO S.A.S	CO
AS64049	Reliance Jio Infocomm Pte Ltd Singapore	SG
AS262589	SAMM TECNOLOGIA E TELECOMUNICACOES S.A	BR
AS60602	Inovare-Prim SRL	MD
AS266142	Bahiadados Telecom Ltda.	BR
AS22356	Durand do Brasil Ltda	BR
AS14537	Continent 8 LLC	US
AS198150	SIACOM JSC	GE
AS40850	UPIX NETWORKS INTERNATIONAL LLC	US

Upstreams

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS7195	EDGEUNO S.A.S	CO
AS14840	BR.Digital Telecom	BR
AS262589	SAMM TECNOLOGIA E TELECOMUNICACOES S.A	BR
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS28663	FLYS INTERATIVA LTDA	BR
AS7713	Telekomunikasi Indonesia PT	ID
AS22356	Durand do Brasil Ltda	BR
AS40850	UPIX NETWORKS INTERNATIONAL LLC	US
AS4230	CLARO S.A.	BR

Downstreams

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US