CNAE 4221-9/04 · Rio de Janeiro (RJ)
Construção de estações e redes de telecomunicações in Rio de Janeiro (RJ)
44 active companies are headquartered in Rio de Janeiro (RJ) with this CNAE as their main activity. They represent 3.3% of Brazil's active companies with the same main activity.
Source: Receita Federal, CNPJ Open Data · October 2026 publication
The same activity in Brazil 1,316 · Rio de Janeiro 87
What this list shows
We count each active company once, by its head office in the city and this CNAE as its main activity. Branches and secondary activities are excluded from this scope. The total describes the registry, not market revenue or company quality.
- Companies in Rio de Janeiro (RJ)
- 44
- 3.3% of Brazil's
- Of every 100 companies in Rio de Janeiro (RJ)
- 0.0
- do this activity
- Among Rio de Janeiro's cities
- 1st
- by companies in this activity
Active companies in Rio de Janeiro (RJ)
More active establishments and higher registered capital first. This order is not a quality assessment or recommendation. · page 1 of 2- ETE - ENGENHARIA DE TELECOMUNICACOES E ELETRICIDADE LTDARio de Janeiro (RJ)
- CENTAURO ENGENHARIA DE SISTEMAS LTDARio de Janeiro (RJ)
- ALCATEL SUBMARINE NETWORKS BRAZIL LTDARio de Janeiro (RJ)
- SMART ENGENHARIA E SERVICOS TERCEIRIZADOS LTDARio de Janeiro (RJ)
- M M R FUSAO SERVICOS LTDARio de Janeiro (RJ)
- RJTECH COMERCIO E SERVICOS LTDARio de Janeiro (RJ)
- CENTAURO TELECOM LTDARio de Janeiro (RJ)
- AGUIAS FACILITY SERVICOS LTDARio de Janeiro (RJ)
- FASTCOM EQUIPAMENTOS E SERVICOS DE TELECOMUNICACAO LTDA.Rio de Janeiro (RJ)
- MUNDIAL SERVICOS EM TELECOMUNICACOES LTDARio de Janeiro (RJ)
- J E LINK'' SERVICOS LTDARio de Janeiro (RJ)
- JLR INSTALACOES EM TELECOMUNICACOES LTDARio de Janeiro (RJ)
- VIEIRA REDES E INSTALACOES E TRANSPORTE LTDARio de Janeiro (RJ)
- CARIOCA FIBRA TELECOMUNICACOES LTDARio de Janeiro (RJ)
- CLEAR TELECOM LTDARio de Janeiro (RJ)
- MJR TELECOMUNICACOES E SERVICOS LTDARio de Janeiro (RJ)
- GETFAITH SERVICOS LTDARio de Janeiro (RJ)
- CDA TELECOMUNICACOES LTDARio de Janeiro (RJ)
- CLF WEST TELECOM LTDARio de Janeiro (RJ)
- TRINITY TECHNOLOGY TELECOM LTDARio de Janeiro (RJ)
- FUSAO RIO SAO PAULO SERVICOS E LOCACAO DE EQUIPAMENTOS PARA TELECOMUNICACOES LTDARio de Janeiro (RJ)
- TELCOMTI - TELECOMUNICACOES E TECNOLOGIA DA INFORMACAO LTDARio de Janeiro (RJ)
- ZOE TEL TELECOMUNICACOES LTDARio de Janeiro (RJ)
- GMS FUSAO SERVICOS E LOCACAO DE EQUIPAMENTOS PARA TELECOMUNICACOES LTDARio de Janeiro (RJ)
- W A TELEINFORMATICA LTDARio de Janeiro (RJ)
- SERVCOM TELECOMUNICACOES LTDARio de Janeiro (RJ)
- BDR TELECOMUNICACOES LTDARio de Janeiro (RJ)
- GAMMA TELECOM & ELETRICA LTDARio de Janeiro (RJ)
- FOCUS TELECOM LTDARio de Janeiro (RJ)
- PROTEL SUBEMPREITEIRA E INSTALACOES LTDARio de Janeiro (RJ)
List limited to 44 companies, 30 per page. Looking for a specific company? Search by name or CNPJ.
How to assess a company's data
When you open a company's record, use these guides to check the data and understand what each field can establish.
- How to look up a CNPJ
Check identifiers, dates and registry fields against official sources.
- What an active CNPJ means
Active status does not show that a company is debt-free, licensed or able to operate.
- How to read partner and administrator records
Understand QSA roles and the limits on ownership and representation information.
How much the activity weighs
of every 100 active companies, how many do this activity
- Rio de Janeiro (RJ)0.0
- Rio de Janeiro0.0
- Brazil0.0
In Rio de Janeiro (RJ), the activity weighs less than in Brazil.
Rio de Janeiro's cities with the most companies in this activity
active companies and each city's share of the state
- 1 Rio de Janeiro 50.6% 44
- 2 Rio das Ostras 8.0% 7
- 3 Niterói 6.9% 6
- 4 Duque de Caxias 5.7% 5
- 5 São Gonçalo 3.4% 3
- 6 Volta Redonda 3.4% 3
- 7 Japeri 2.3% 2
- 8 Nova Friburgo 2.3% 2
- 9 Nova Iguaçu 2.3% 2
- 10 Mesquita 1.1% 1
12 more cities
- 11 Guapimirim 1
- 12 Angra dos Reis 1
- 13 Araruama 1
- 14 Cabo Frio 1
- 15 Cantagalo 1
- 16 Itaboraí 1
- 17 Macaé 1
- 18 Magé 1
- 19 Maricá 1
- 20 Rio Bonito 1
- 21 São João de Meriti 1
- 22 Saquarema 1
Class 4221-9 in Rio de Janeiro (RJ)
obras para geração e distribuição de energia elétrica e para telecomunicações, by subclass| Subclass | Active |
|---|---|
| 4221-9/01 Construção de barragens e represas para geração de energia elétrica | 3 |
| 4221-9/02 Construção de estações e redes de distribuição de energia elétrica | 61 |
| 4221-9/03 Manutenção de redes de distribuição de energia elétrica | 32 |
| 4221-9/04 Construção de estações e redes de telecomunicações · this one | 44 |
| 4221-9/05 Manutenção de estações e redes de telecomunicações | 55 |
Close to this: 6190-6/99 · Outras atividades de telecomunicações não especificadas anteriormente, 1,515 companies in Rio de Janeiro (RJ).
What activity 4221-9/04 is
- As obras para implantação de serviços de telecomunicações: #- construção de redes de longa e média distância de telecomunicações
- A execução de projetos de instalações para estações de telefonia e centrais telefônicas
Frequently asked questions
How many companies have main CNAE 4221-9/04 in Rio de Janeiro (RJ)?
44 active companies have CNAE 4221-9/04 as their main activity in Rio de Janeiro (RJ), according to the Receita Federal's October 2026 publication. That is 0.0 of every 100 companies there, against 0.0 in Brazil.
Which of Rio de Janeiro's cities has the most companies in this activity?
Rio de Janeiro, with 44, 50.6% of the state's companies in this activity.
Why can this total differ from the companies operating in the city?
This scope counts active companies by their head office and registered main activity. A company may operate in the city through a branch or carry out the activity as a secondary activity and be excluded from the count. The registered address and CNAE do not establish every operating location or service.
Does active status mean a company is qualified for a contract?
No. Active status describes the Receita Federal registration. It does not establish tax compliance, creditworthiness, licences, ability to fulfil a contract or quality. Check the relevant official documents and the contract's requirements.
How we count
Active companies with this as their main activity, counted by head office in Rio de Janeiro (RJ).