CNAE 4221-9/05 · Rio de Janeiro (RJ)
Manutenção de estações e redes de telecomunicações in Rio de Janeiro (RJ)
55 active companies are headquartered in Rio de Janeiro (RJ) with this CNAE as their main activity. They represent 3.8% of Brazil's active companies with the same main activity.
Source: Receita Federal, CNPJ Open Data · October 2026 publication
The same activity in Brazil 1,458 · Rio de Janeiro 110
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)
- 55
- 3.8% 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- SEREDE - SERVICOS DE REDE S.A. - FALIDARio de Janeiro (RJ)
- BLUE MARINE TELECOM S.A - ZMAX GROUPRio de Janeiro (RJ)
- GLOBALSTAR MOBILE SATELLITE SERVICES BRAZIL LTDA.Rio de Janeiro (RJ)
- MUNDIVOX DO BRASIL LTDARio de Janeiro (RJ)
- ACCESS GLOBAL NETWORKS SUPORTE, COMERCIO E CONSULTORIA TECNOLOGICA LTDARio de Janeiro (RJ)
- MUNDIVOX HOLDINGS DO BRASIL S.A.Rio de Janeiro (RJ)
- INTELARME TELEFONIA E SEGURANCA ELETRONICA LTDARio de Janeiro (RJ)
- AMTORE TECNOLOGIA DE MONTAGENS E INSTALACOES LTDA.Rio de Janeiro (RJ)
- FOCUS INFRAESTRUTURA E SERVICOS LTDARio de Janeiro (RJ)
- SITTI ASSESSORIA, SERVICOS E COMERCIO DE SISTEMAS INTEGRADOS DE COMUNICACAO E CONTROLE LTDA.Rio de Janeiro (RJ)
- LOG IN BRAZIL TELECOM LTDARio de Janeiro (RJ)
- BELCOM SOLUTIONS NETWORKS LTDARio de Janeiro (RJ)
- SITTEL DO BRASIL - CONSULTORIA EM ENGENHARIA E MANUTENCAO DE REDES DE TELECOMUNICACOES E ENERGIA LTDA.Rio de Janeiro (RJ)
- MARINTER SUPRIMENTOS E SERVICO LTDARio de Janeiro (RJ)
- COMVC CONSULT LTDARio de Janeiro (RJ)
- ETTKOMM SOLUCOES E SERVICOS LTDARio de Janeiro (RJ)
- FILADELFIA TELECOMUNICACOES LTDARio de Janeiro (RJ)
- L.J. NATEL LTDARio de Janeiro (RJ)
- BRM SUBMARINE TELECOM LTDARio de Janeiro (RJ)
- MSJ TELECOMUNICACOES E INFORMATICA LTDARio de Janeiro (RJ)
- H A M MAGANHA TELECOMUNICACAO LTDARio de Janeiro (RJ)
- BARRASYSTEM TECNOLOGIA LTDARio de Janeiro (RJ)
- POLOLINK COMERCIO E SERVICOS LTDARio de Janeiro (RJ)
- TBX TELECOMUNICACOES LTDARio de Janeiro (RJ)
- LUWA DO BRASIL TELECOM & SERVICOS LTDARio de Janeiro (RJ)
- EBENEZER ENGENHARIA LTDARio de Janeiro (RJ)
- LARGO DO TANQUE TELECOMUNICACOES LTDARio de Janeiro (RJ)
- RCMS MARINE BRASIL LTDARio de Janeiro (RJ)
- ON-LINE FIBRA INTERNET LTDARio de Janeiro (RJ)
- DLC INSTALACOES E SEGURANCA ELETRONICA LTDARio de Janeiro (RJ)
List limited to 55 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 what it does 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 50.0% 55
- 2 Niterói 9.1% 10
- 3 São José do Vale do Rio Preto 6.4% 7
- 4 Duque de Caxias 3.6% 4
- 5 Petrópolis 3.6% 4
- 6 São Gonçalo 3.6% 4
- 7 Belford Roxo 2.7% 3
- 8 Magé 2.7% 3
- 9 Volta Redonda 2.7% 3
- 10 Duas Barras 1.8% 2
14 more cities
- 11 Sapucaia 2
- 12 Mesquita 1
- 13 Guapimirim 1
- 14 Cabo Frio 1
- 15 Campos dos Goytacazes 1
- 16 Carmo 1
- 17 Laje do Muriaé 1
- 18 Miguel Pereira 1
- 19 Nova Iguaçu 1
- 20 Paraty 1
- 21 Resende 1
- 22 Rio Bonito 1
- 23 Saquarema 1
- 24 Três Rios 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 | 44 |
| 4221-9/05 Manutenção de estações e redes de telecomunicações · this one | 55 |
Close to this: 9512-6/00 · Reparação e manutenção de equipamentos de comunicação, 2,353 companies in Rio de Janeiro (RJ).
What activity 4221-9/05 is
- A manutenção de estações e redes de longa e média distância de telecomunicações
Frequently asked questions
How many companies have main CNAE 4221-9/05 in Rio de Janeiro (RJ)?
55 active companies have CNAE 4221-9/05 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 55, 50.0% 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).