CNAE 4221-9/05 · Brazil
Manutenção de estações e redes de telecomunicações
1,458 active companies in the Brazilian CNPJ registry have this CNAE as their main activity. Look up companies and explore their distribution by state and city.
Source: Receita Federal, CNPJ Open Data · October 2026 publication
What this list shows
We count each active company in the Brazilian CNPJ registry once, by its head office 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.
- Active companies
- 1,458
- 664th of 1,329 activities
- Opened in 12 months
- 196
- +3.2% · 597th by openings
- Of every 100 companies in the country
- 0.0
- do this activity
- Openings per 100 active
- 13
- in the country: 21
Active companies in this activity
More active establishments and higher registered capital first. This order is not a quality assessment or recommendation.- SEREDE - SERVICOS DE REDE S.A. - FALIDARio de Janeiro (RJ)
- ONDACOM SERVICOS DE TELECOMUNICACOES LTDACajamar (SP)
- ICOMON TECNOLOGIA LTDASão Paulo (SP)
- TEL TELECOMUNICACOES LTDA.São Paulo (SP)
- MAGNECON TELECOMUNICACOES E EMPREENDIMENTOS LTDAItaú de Minas (MG)
- M S NOGUEIRA LTDASão Luís (MA)
- HEIRO COMERCIO E SERVICOS LTDASão Luís (MA)
- SEABRA - PRESTACAO DE SERVICOS EM TELEMARKETINGLTDAPará de Minas (MG)
- VALE TELECOM LTDALorena (SP)
- BLUE MARINE TELECOM S.A - ZMAX GROUPRio de Janeiro (RJ)
- TELEBIT BRASIL TELECOMUNICACAO LTDABarueri (SP)
- YOU CAST COMERCIO DE EQUIPAMENTOS ELETRONICOS LTDASão Paulo (SP)
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.
Where the companies are
Weight in each federative unit: of every 100 active companies, how many have this main activity
- 0.0
- 0.0
- 0.0
- 0.0
- 0.0
Federative units with the most companies
- 1 São Paulo 481
- 2 Minas Gerais 160
- 3 Rio Grande do Sul 140
- 4 Rio de Janeiro 110
- 5 Paraná 105
- 6 Santa Catarina 69
- 7 Bahia 61
- 8 Goiás 48
- 9 Ceará 34
- 10 Pará 30
See the 25 federative units
- 11 Pernambuco 27
- 12 Maranhão 26
- 13 Amazonas 23
- 14 Distrito Federal 21
- 15 Espírito Santo 19
- 16 Paraíba 19
- 17 Mato Grosso do Sul 18
- 18 Rio Grande do Norte 15
- 19 Mato Grosso 14
- 20 Tocantins 11
- 21 Sergipe 9
- 22 Alagoas 4
- 23 Piauí 4
- 24 Rondônia 4
- 25 Acre 1
Cities with the most companies
active companies by head office
- 1 São Paulo (SP) 194
- 2 Rio de Janeiro (RJ) 55
- 3 Curitiba (PR) 46
- 4 Belo Horizonte (MG) 38
- 5 Porto Alegre (RS) 33
- 6 Salvador (BA) 26
- 7 Fortaleza (CE) 24
- 8 Brasília (DF) 21
- 9 Manaus (AM) 20
- 10 São Luís (MA) 20
See the 30 cities
- 11 Uberlândia (MG) 17
- 12 Campinas (SP) 15
- 13 Osasco (SP) 15
- 14 São José dos Campos (SP) 13
- 15 Recife (PE) 12
- 16 Guarulhos (SP) 12
- 17 São Bernardo do Campo (SP) 12
- 18 Chapecó (SC) 12
- 19 Goiânia (GO) 12
- 20 João Pessoa (PB) 11
- 21 Sorocaba (SP) 11
- 22 Lauro de Freitas (BA) 10
- 23 Niterói (RJ) 10
- 24 Novo Hamburgo (RS) 9
- 25 Natal (RN) 8
- 26 Bauru (SP) 8
- 27 São Caetano do Sul (SP) 8
- 28 Maringá (PR) 8
- 29 Cachoeirinha (RS) 8
- 30 Ananindeua (PA) 7
What activity 4221-9/05 is
- Section F — Construção
- Division — Obras de infra-estrutura
- Group — Obras de infra-estrutura para energia elétrica, telecomunicações, água, esgoto e transporte por dutos
- Class — Obras para geração e distribuição de energia elétrica e para telecomunicações
What it covers
- A manutenção de estações e redes de longa e média distância de telecomunicações
What it does not cover
- A manutenção de conexos operacionais à rede de telecomunicações em prédios residenciais, comerciais, industriais, etc. (6190-6/99)Classified under: 6190-6/99 Outras atividades de telecomunicações não especificadas anteriormente
- A instalação e reparação de sistemas de telecomunicações, como, por exemplo, estações telefônicas (9512-6/00)Classified under: 9512-6/00 Reparação e manutenção de equipamentos de comunicação
Typical activities
- Manutenção das instalações para estação e redes de telefonia e comunicações
- Manutenção de cabos de comunicação e transmissão de dados de longa e média distância, exceto cabos submarinos
- Manutenção por terceiros redes de telecomunicações de longa e media distancia
The activities of class 4221-9
obras para geração e distribuição de energia elétrica e para telecomunicações, by subclass| Subclass | Active | Openings | Change |
|---|---|---|---|
| 4221-9/01 Construção de barragens e represas para geração de energia elétrica | 202 | 12 | — |
| 4221-9/02 Construção de estações e redes de distribuição de energia elétrica | 2,355 | 137 | −9.3% |
| 4221-9/03 Manutenção de redes de distribuição de energia elétrica | 1,180 | 97 | −16.4% |
| 4221-9/04 Construção de estações e redes de telecomunicações | 1,316 | 121 | −15.4% |
| 4221-9/05 Manutenção de estações e redes de telecomunicações · this one | 1,458 | 196 | +3.2% |
Frequently asked questions about CNAE 4221-9/05
How many CNAE 4221-9/05 companies are there in Brazil?
1,458 active companies have CNAE 4221-9/05 as their main activity, according to the Receita Federal's October 2026 publication. It is 664th among the country's activities by companies.
Which activities make up class 4221-9?
Class 4221-9 has 5 subclasses: 4221-9/01; 4221-9/02; 4221-9/03; 4221-9/04; 4221-9/05. The official names are in the subclass table. A company declares one main activity and may declare others as secondary activities.
Which federative unit has the most companies in this activity?
São Paulo, with 481. There, 0.0 of every 100 active companies have this main activity, against 0.0 in the national registry.
Does this total include branches and secondary activities?
No. Each active company is counted once, by its head office and registered main activity. A company may carry out this activity as a secondary activity and be excluded from the count. Geographic distribution uses the registered location; records without a recognized federative unit may be counted nationally without appearing in local groups.
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 in the Brazilian CNPJ registry with this as their main activity, counted once by head office. Location is taken from the registry. Where available, openings are for the last 12 months, compared with the previous 12 months.