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CNAE 4221-9/04 · Brazil

Construção de estações e redes de telecomunicações

1,316 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
1,316
687th of 1,329 activities
Opened in 12 months
121
−15.4% · 679th by openings
Of every 100 companies in the country
0.0
do this activity
Openings per 100 active
9
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.

Look up companies in this activity (up to 300)

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.

Where the companies are

Acre: 0 companies, 0.0 of every 100 active companies there Alagoas: 5 companies, 0.0 of every 100 active companies there Amapá: 2 companies, 0.0 of every 100 active companies there Amazonas: 13 companies, 0.0 of every 100 active companies there Bahia: 65 companies, 0.0 of every 100 active companies there Ceará: 49 companies, 0.0 of every 100 active companies there Distrito Federal: 36 companies, 0.0 of every 100 active companies there Espírito Santo: 17 companies, 0.0 of every 100 active companies there Goiás: 50 companies, 0.0 of every 100 active companies there Maranhão: 31 companies, 0.0 of every 100 active companies there Mato Grosso: 13 companies, 0.0 of every 100 active companies there Mato Grosso do Sul: 17 companies, 0.0 of every 100 active companies there Minas Gerais: 133 companies, 0.0 of every 100 active companies there Pará: 39 companies, 0.0 of every 100 active companies there Paraíba: 23 companies, 0.0 of every 100 active companies there Paraná: 106 companies, 0.0 of every 100 active companies there Pernambuco: 21 companies, 0.0 of every 100 active companies there Piauí: 19 companies, 0.0 of every 100 active companies there Rio de Janeiro: 87 companies, 0.0 of every 100 active companies there Rio Grande do Norte: 12 companies, 0.0 of every 100 active companies there Rio Grande do Sul: 101 companies, 0.0 of every 100 active companies there Rondônia: 3 companies, 0.0 of every 100 active companies there Roraima: 1 company, 0.0 of every 100 active companies there Santa Catarina: 75 companies, 0.0 of every 100 active companies there São Paulo: 379 companies, 0.0 of every 100 active companies there Sergipe: 7 companies, 0.0 of every 100 active companies there Tocantins: 5 companies, 0.0 of every 100 active companies there

Weight in each federative unit: of every 100 active companies, how many have this main activity

  1. 0.0
  2. 0.0
  3. 0.0
  4. 0.0
  5. 0.0

Federative units with the most companies

  1. 1 São Paulo 379
  2. 2 Minas Gerais 133
  3. 3 Paraná 106
  4. 4 Rio Grande do Sul 101
  5. 5 Rio de Janeiro 87
  6. 6 Santa Catarina 75
  7. 7 Bahia 65
  8. 8 Goiás 50
  9. 9 Ceará 49
  10. 10 Pará 39
See the 26 federative units
  1. 11 Distrito Federal 36
  2. 12 Maranhão 31
  3. 13 Paraíba 23
  4. 14 Pernambuco 21
  5. 15 Piauí 19
  6. 16 Espírito Santo 17
  7. 17 Mato Grosso do Sul 17
  8. 18 Amazonas 13
  9. 19 Mato Grosso 13
  10. 20 Rio Grande do Norte 12
  11. 21 Sergipe 7
  12. 22 Alagoas 5
  13. 23 Tocantins 5
  14. 24 Rondônia 3
  15. 25 Amapá 2
  16. 26 Roraima 1

Cities with the most companies

active companies by head office

  1. 1 São Paulo (SP) 135
  2. 2 Belo Horizonte (MG) 50
  3. 3 Rio de Janeiro (RJ) 44
  4. 4 Curitiba (PR) 39
  5. 5 Brasília (DF) 36
  6. 6 Porto Alegre (RS) 29
  7. 7 Campinas (SP) 26
  8. 8 Salvador (BA) 25
  9. 9 Fortaleza (CE) 24
  10. 10 Goiânia (GO) 18
See the 30 cities
  1. 11 Belém (PA) 16
  2. 12 São Luís (MA) 16
  3. 13 Colombo (PR) 14
  4. 14 Manaus (AM) 13
  5. 15 Recife (PE) 13
  6. 16 Osasco (SP) 13
  7. 17 São José dos Campos (SP) 13
  8. 18 Teresina (PI) 12
  9. 19 Contagem (MG) 12
  10. 20 João Pessoa (PB) 11
  11. 21 Uberlândia (MG) 11
  12. 22 Guarulhos (SP) 11
  13. 23 Ribeirão Preto (SP) 11
  14. 24 Florianópolis (SC) 11
  15. 25 Vila Velha (ES) 9
  16. 26 Maringá (PR) 9
  17. 27 Aparecida de Goiânia (GO) 9
  18. 28 Ananindeua (PA) 8
  19. 29 Erechim (RS) 8
  20. 30 Nazarezinho (PB) 7

What activity 4221-9/04 is

  1. Section F — Construção
  2. Division — Obras de infra-estrutura
  3. Group — Obras de infra-estrutura para energia elétrica, telecomunicações, água, esgoto e transporte por dutos
  4. Class — Obras para geração e distribuição de energia elétrica e para telecomunicações

What it covers

  • 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

What it does not cover

Typical activities

  • Centrais telefônicas, construção de instalações para
  • Construção de redes de fibra óptica para serviços de telecomunicações
  • Estação repetidora, construção de instalações para
  • Estações e redes de telefonia e comunicação, construção de
  • Estações telefônicas, construção de instalações para
  • Instalação de redes de cabos telefônicos, obras civis
  • Instalação de torres para antenas
  • Instalação de torres para comunicação
  • Instalações de cabos para telefones, telégrafos, obras civis de
  • Rede telefônica de longa e media distancia, construção de
  • Redes de telecomunicações de longa e media distancia, construção de
  • Redes de transmissão para telefones, construção de

Source: IBGE, CNAE 2.3 and its explanatory notes

The activities of class 4221-9

obras para geração e distribuição de energia elétrica e para telecomunicações, by subclass
SubclassActiveOpeningsChange
4221-9/01 Construção de barragens e represas para geração de energia elétrica20212—
4221-9/02 Construção de estações e redes de distribuição de energia elétrica2,355137−9.3%
4221-9/03 Manutenção de redes de distribuição de energia elétrica1,18097−16.4%
4221-9/04 Construção de estações e redes de telecomunicações · this one1,316121−15.4%
4221-9/05 Manutenção de estações e redes de telecomunicações1,458196+3.2%

Frequently asked questions about CNAE 4221-9/04

How many CNAE 4221-9/04 companies are there in Brazil?

1,316 active companies have CNAE 4221-9/04 as their main activity, according to the Receita Federal's October 2026 publication. It is 687th 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 379. 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.