mathematics

List of dialling codes in Brazil

List of dialling codes in Brazil is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of dialling codes in Brazil rather than just read about it. In short: Country Code: +55 International Call Prefix: 00 then Carrier Code Trunk Prefix: 0 then Carrier Code This article contains a list of area codes in Brazil for telephone dialing. The area codes are distributed geographically, citing the main cities in each area.

Key takeaways

List of dialling codes in Brazil belongs to mathematics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of dialling codes in Brazil to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of dialling codes in Brazil from memory before moving on to harder problems.

Reference excerpt

Country Code: +55 International Call Prefix: 00 then Carrier Code Trunk Prefix: 0 then Carrier Code This article contains a list of area codes in Brazil for telephone dialing. The area codes are distributed geographically, citing the main cities in each area. Local phone numbers in Brazil observe an eight-digit pattern (dddd-dddd) for landlines and nine digits (ddddd-dddd) for mobile phones. Mobile numbers share the same geographic area codes as landlines, but the first digit differentiates them. Landline numbers start with digits 2 through 5. Initial digits 6 through 9 are reserved for mobile numbers, but as of 2017 all mobile numbers in Brazil start with the digit 9. (There was an exception for some iDEN mobile lines operated by Nextel, which were eight digits long and started with 7, disestablished in 2018.) Area codes have two digits, and are often notated between parentheses: (aa) nnnn-nnnn. For long-distance calls within Brazil, a zero (0) must be dialed first, then a carrier selection code (for example, 21 for Embratel and 41 for TIM Brasil), then the two-digit area code, then the local number. For example, to call the number 2222-2222 in Fortaleza (area code 85) using Oi (selection code 31) as the chosen carrier, one would dial 0 31 85 2222 2222. For international calls to Brazil, the international access code used in the calling country must be dialed (for example, 011 from the United States and Canada, 00 from Europe and most other countries, or the actual "+" sign from some mobile networks), then Brazil's country code 55, then the two-digit area code, then the local eight- or nine-digit number. For example, to call the number 3333-3333 in Rio de Janeiro (area code 21) from Europe, one would dial 00 55 21 3333 3333.

1 State of São Paulo 11 – São Paulo metropolitan area 12 – Vale do Paraíba (São José dos Campos, Taubaté, Guaratinguetá) and Northern coast (Ubatuba, São Sebastião) 13 – Baixada Santista (Santos, São Vicente, Guarujá) and Southern coast (Registro, Itanhaém) 14 – Central (Bauru, Marília, Botucatu) 15 – Southwest (Sorocaba, Itapetininga) 16 – Northeast (Ribeirão Preto, Franca, São Carlos) 17 – Northwest (São José do Rio Preto, Catanduva, Barretos) 18 – West (Presidente Prudente, Araçatuba) 19 – Central-South (Campinas, Piracicaba, Limeira)

2 States of Rio de Janeiro and Espírito Santo

Rio de Janeiro (21, 22 and 24) 21 – Greater Rio de Janeiro and Teresópolis 22 – East and North (Campos dos Goytacazes, Cabo Frio, Nova Friburgo) 23 – reserved 24 – West (Petrópolis, Volta Redonda, Angra dos Reis) 25 and 26 – reserved

Espírito Santo (27 and 28) 27 – Central and North (Vitória, Linhares, Colatina) 28 – South (Cachoeiro de Itapemirim, Castelo) 29 – reserved

3 State of Minas Gerais 31 – Central (Greater Belo Horizonte, Sete Lagoas, Ipatinga) 32 – Southeast (Juiz de Fora, Muriaé, Barbacena) 33 – East and Northeast (Governador Valadares, Teófilo Otoni) 34 – West (Uberlândia, Uberaba, Patos de Minas) 35 – Southwest (Poços de Caldas, Varginha, Pouso Alegre) 36 – reserved 37 – Central-West (Divinópolis) 38 – North (Montes Claros, Diamantina) 39 – reserved

4 States of Paraná and Santa Catarina

Paraná (41–46) 41 – Greater Curitiba and coast (Paranaguá) 42 – Central-South (Ponta Grossa, Guarapuava) 43 – Northeast (Londrina, Apucarana) 44 – Northwest (Maringá, Umuarama) 45 – West (Foz do Iguaçu, Cascavel) 46 – Southwest (Francisco Beltrão, Pato Branco)

Santa Catarina (47–49) 47 – Northeast (Joinville, Blumenau, Itajaí) 48 – Greater Florianópolis and South (Criciúma, Tubarão) 49 – Central and West (Lages, Chapecó)

5 State of Rio Grande do Sul 51 – Greater Porto Alegre, Central-South (Santa Cruz do Sul), Northern coast (Torres) 52 – reserved 53 – South (Pelotas, Rio Grande, Bagé) 54 – North (Caxias do Sul, Passo Fundo) 55 – Central, West and Northwest (Santa Maria, Uruguaiana, Ijuí) 56–59 – reserved

6 Central-West Region and states of Tocantins, Acre and Rondônia

Federal District (part of 61) 61 – entire Federal District (Brasília) and surrounding area of Goiás state

Goiás (part of 61, plus 62 and 64) 61 – area surrounding Brasília 62 – Central and North (Greater Goiânia, Anápolis) 64 – South and West (Rio Verde, Itumbiara, Catalão)

Tocantins (63) 63 – entire State of Tocantins (capital city Palmas)

Mato Grosso (65 and 66) 65 – Southwest (Cuiabá, Cáceres) 66 – East and North (Rondonópolis, Sinop)

Mato Grosso do Sul (67) 67 – entire State of Mato Grosso do Sul (capital city Campo Grande)

Acre (68) 68 – entire State of Acre (capital city Rio Branco)

Rondônia (69) 69 – entire State of Rondônia (capital city Porto Velho)

7 States of Bahia and Sergipe

Bahia (71, 73–75, 77) 71 – Greater Salvador 72 – reserved 73 – South (Ilhéus, Itabuna, Porto Seguro, Jequié) 74 – Northwest (Juazeiro) 75 – Northeast (Feira de Santana) 76 – reserved 77 – Southwest and West (Vitória da Conquista, Barreiras) 78 – reserved (formerly used by Embratel for maritime telecommunications and for the RENPAC dialled data communication system)

Sergipe (79) 79 – entire State of Sergipe (capital city Aracaju)

8 Northeast Region

Pernambuco (81 and 87) 81 – East (Greater Recife, Caruaru, Fernando de Noronha) 87 – Central and West (Petrolina, Garanhuns)

Alagoas (82) 82 – entire State of Alagoas (capital city Maceió)

Paraíba (83) 83 – entire State of Paraíba (capital city João Pessoa)

Rio Grande do Norte (84) 84 – entire State of Rio Grande do Norte (capital city Natal)

Ceará (85 and 88) 85 – Greater Fortaleza 88 – Central, West and South (Juazeiro do Norte, Sobral)

Piauí (86 and 89) 86 – North (Teresina, Parnaíba) 89 – Central and South (Picos, Floriano)

9 North Region and the state of Maranhão

Pará (91, 93 and 94) 91 – Northeast (Greater Belém, Capanema) 93 – Central and West (Santarém, Altamira) 94 – Southeast (Marabá, Carajás)

Amazonas (92 and 97) 92 – Northeast (Greater Manaus, Itacoatiara, Parintins) 97 – Central, South and West (Coari, Tabatinga, Humaitá)

Roraima (95) 95 – entire State of Roraima (capital city Boa Vista)

Amapá (96) 96 – entire State of Amapá (capital city Macapá)

Maranhão (98 and 99) 98 – North (Greater São Luís, Pinheiro) 99 – Central and South (Imperatriz, Caxias)

Exceptions In a few exceptional cases, some area codes span state borders to cater for tightly integrated interstate communities:

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with List of dialling codes in Brazil

Start with the simplest possible case. Write down what List of dialling codes in Brazil claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of dialling codes in Brazil before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of dialling codes in Brazil ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of dialling codes in Brazil

In research: List of dialling codes in Brazil appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of dialling codes in Brazil in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of dialling codes in Brazil is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brazil communications-related lists, Telephone numbers by country, Telephone numbers in Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for List of dialling codes in Brazil outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of dialling codes in Brazil in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of dialling codes in Brazil means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
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Frequently asked questions

What is List of dialling codes in Brazil in simple terms?

Why does List of dialling codes in Brazil matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of dialling codes in Brazil?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of dialling codes in Brazil.