CEP Generator

What is a ZIP Code generator used for?

CEP, short for Brazilian Postal Code, is an 8-digit number the postal service uses to identify regions across Brazil, and each state occupies a specific range of those numbers.

It comes in handy when you need to test address forms, double-check shipping calculations or validate postal API integrations while developing.

The generated CEPs are within the real ranges per state but may not correspond to a real address.

How the Brazilian postal code (CEP) works

The CEP — Código de Endereçamento Postal is the eight-digit postal code created by the Brazilian Post Office (Correios) in 1971 through DEPLAN Standard nº 1/71. Originally it had five digits; in May 1992 the format was expanded to eight to support finer routing in large cities. The canonical notation is XXXXX-XXX, where the first five digits encode geography (region, sub-region, sector, sub-sector and divisor) and the three digits after the hyphen are the suffix — pointing to a specific street segment, block, building or post-office customer.

Geographic layout

The very first digit splits Brazil into ten postal regions:

• 0 — São Paulo (capital and metropolitan area)
• 1 — São Paulo state, interior
• 2 — Rio de Janeiro and Espírito Santo
• 3 — Minas Gerais
• 4 — Bahia and Sergipe
• 5 — Pernambuco, Alagoas, Paraíba, Rio Grande do Norte, Ceará, Piauí, Maranhão
• 6 — Pará, Amazonas, Acre, Amapá, Rondônia, Roraima, Tocantins
• 7 — Distrito Federal, Goiás, Mato Grosso, Mato Grosso do Sul
• 8 — Paraná and Santa Catarina
• 9 — Rio Grande do Sul

The next digits narrow the location down: the second is the sub-region, the third the sector, the fourth the sub-sector and the fifth the divisor of sub-sector. Together these five digits identify a city, a district or a large block within a metropolitan area. The three digits after the hyphen — the suffix — pinpoint a street, a side of a street, a building or a post-office box range.

Special suffixes

• -000 — single CEP for an entire small town (no per-street resolution)
• -899 — post-office boxes (caixas postais comunitárias)
• -900 to -959 — large customers (banks, ministries, universities with their own CEP)
• -970 to -989 — Correios service units

Looking up real addresses

Correios maintains the authoritative database through the SIGEP service and licenses it via DNE (Diretório Nacional de Endereços). Free community front-ends like ViaCEP and BrasilAPI wrap the same data with a friendlier REST API and are widely used by Brazilian e-commerce checkouts for address autocomplete.