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If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	138.185.240.0/23	MAST TELECOMUNICACOES E INFORMATICA LTDA
	138.185.240.0/22	MAST TELECOMUNICACOES E INFORMATICA LTDA
	138.185.242.0/23	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0::/34	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0::/33	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0::/32	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0:4000::/34	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0:8000::/34	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0:8000::/33	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0:c000::/34	MAST TELECOMUNICACOES E INFORMATICA LTDA
	2804:27c0:ffff::/48	MAST TELECOMUNICACOES E INFORMATICA LTDA

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS61568	ALOO TELECOM - FSF TECNOLOGIA SA	✔	✔
	AS14840	BR.DIGITAL	✔	✔
	AS265290	Uplink Telecom	✘	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS61568	ALOO TELECOM - FSF TECNOLOGIA SA	✔	✔
	AS270305	ACESSE INTERNET	✔	✔
	AS6939	Hurricane Electric LLC	✔	✔
	AS14840	BR.DIGITAL	✔	✔
	AS267339	3M Fibra	✔	✔
	AS269255	JACINTO SILVEIRA COSTA ME	✔	✔
	AS267330	JLCONECT PB	✔	✔
	AS266096	NAVEGAR PROVEDOR	✔	✔
	AS267287	MEGANET PROVEDOR	✔	✔
	AS270924	JPA Telecom	✔	✘
	AS265290	Uplink Telecom	✘	✔
	AS7195	EdgeUno	✔	✔
	AS266400	Ferenz Networks	✔	✔
	AS263661	Brasil Digital Telecom	✔	✔
	AS9498	Bharti Airtel Ltd.	✔	✘
	AS61680	ACESSO SIMPLES LTDA	✔	✔
	AS1916	RNP - Rede Nacional de Ensino e Pesquisa	✔	✔
	AS13335	Cloudflare, Inc.	✔	✔
	AS32590	Valve Corporation	✔	✔
	AS214331	Teske Virtual System Ltda	✔	✘
	AS262462	Aranet Play	✔	✔
	AS262287	Latitude.sh LTDA	✔	✔
	AS265038	TELFO SERVICO DE TELECOMUNICACOES LTDA	✔	✘
	AS61624	ISPSHIELD (InfNOC Tecnologia)	✔	✔
	AS2635	Automattic, Inc	✔	✘
	AS263903	INFORBARRA TELECOM	✔	✔
	AS267613	ELETRONET S.A.	✔	✔
	AS264409	Huge Networks	✔	✘
	AS6424	EDGOO NETWORKS	✔	✘
	AS40776	TaoNet	✔	✘
	AS269180	VIPNET Conexão	✔	✘
	AS262880	RADAR WISP LTDA	✔	✘
	AS52999	START TELECOM LTDA	✔	✔
	AS262589	SAMM (Internexa)	✔	✔
	AS53062	ALT | GRUPO BRASIL TECPAR	✔	✘
	AS42473	Anexia Cloud Solutions GmbH	✔	✘
	AS1251	FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO SÃO PAULO	✔	✘
	AS52888	UNIVERSIDADE FEDERAL DE SAO CARLOS	✔	✘
	AS263541	IMF NETWORK DATA LTDA - ME	✔	✘
	AS15169	Google LLC	✔	✔
	AS24482	SG.GS	✔	✘
	AS270684	WEB KONECT TELECOM DE FRUTAL LTDA	✔	✘
	AS14907	Wikimedia Foundation Inc.	✔	✘
	AS274676	MULTIWAY COMERCIO E REPRESENTACOES LTDA	✔	✘
	AS215248	Bastiaan Mathijs Brink	✔	✘
	AS60503	FNX Tecnologia LTDA	✔	✘
	AS36236	NetActuate, Inc	✔	✘
	AS39120	Convergenze S.p.A.	✔	✘
	AS20473	The Constant Company, LLC	✔	✘
	AS263444	Open X Tecnologia Ltda	✔	✔
	AS49544	i3D.net B.V	✔	✔
	AS269396	UNIR TELECOM	✔	✔
	AS262832	Link Cariri	✘	✔
	AS22381	SAMM (Megatelecom)	✔	✘
	AS28283	Adyl Telecom	✔	✔
	AS52872	VOANET Telecomunicações Ltda.	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS270305	ACESSE INTERNET	✔	✔
	AS269255	JACINTO SILVEIRA COSTA ME	✔	✔
	AS266096	NAVEGAR PROVEDOR	✔	✔
	AS267330	JLCONECT PB	✔	✔
	AS267339	3M Fibra	✔	✔
	AS267287	MEGANET PROVEDOR	✔	✔
	AS270924	JPA Telecom	✔	✘

% IP Client: 2a0c:2f07:9459:2c8:0:0:0:247
 % 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.
% 2025-10-29T02:50:14-03:00 - 2a0c:2f07:9459:2c8::247

aut-num:     AS263920
owner:       MAST TELECOMUNICACOES E INFORMATICA LTDA
ownerid:     12.640.121/0001-87
responsible: Aldo Artur de Figueiredo
country:     BR
owner-c:     ALAFI70
routing-c:   NOMTE8
abuse-c:     NOMTE8
created:     20150812
changed:     20210909
inetnum:     138.185.240.0/22
inetnum:     2804:27c0::/32

nic-hdl-br:  ALAFI70
person:      Aldo Artur de Figueiredo
# Email removed, Log into bgp.tools to see whois emails
country:     BR
created:     20140424
changed:     20170418

nic-hdl-br:  NOMTE8
person:      NOC Mast Telecom
# Email removed, Log into bgp.tools to see whois emails
country:     BR
created:     20180216
changed:     20190225

% 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.

Last Update: 2025-10-29T05:50:14Z UTC / (Click here to force a refresh)

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Member of the following AS-SETs

-	Member
RADB	as-1telecom-customers01
RADB	as-mob-customer-as61832
RADB	as-brisanet-customers
RADB	as-stormwall-set
RADB	as-hurricanev6
RIPE	as-koddos
RADB	as61568:as-aloo-telecom
RADB	as-rocketnetwork-tools
RADB	as-durand1-customer
RADB	as-ufinet-latam-brasil
RADB	as-embratelnet
ALTDB	as263920:as-customers
RADB	as-gnt-customers
RADB	as26615:as-customers
RADB	as-ctbc-tools
RADB	as-rocketnetwork-customers
ALTDB	as-263920
RADB	as-ctbc-customers84
RADB	as-fortel-customers
RADB	as7545:as-tpgn-customers
RADB	as52320:as-customers
RIPE	as-stormwall-set
RADB	as53013:as-cone
RADB	as61568:as-aloo-telecom-ddos
RADB	as-maxihost
RADB	as-mob-customer-as263920
RADB	as-267613
RADB	as14840:as-customers-01