CTT Correios de Portugal, S.A.—meaning Postal Services of Portugal, plc—is the national postal service of Portugal. The acronym CTT comes from Correios, Telégrafos e Telefones—Post, Telegraph and Telephone—the former name of the postal administration. CTT has become a public limited company in 1991, but all the capital is still controlled by the Portuguese government.

In 2007, CTT started to offer a mobile phone service in Portugal, under the brand name Phone-ix.

CTT was also the designation of the postal services of the former Portuguese Colonies. It is still the designation of the Macau Postal Service.

The CTT group

The CTT group includes the following subsidiaries:

CTT Correios: national and international regular mail delivering company;

CTT Expresso: national and international express mail service;

Mailtec: management and information systems research & development company;

PostContacto: non addressed mail delivering company;

Campos Envelopagem: direct marketing and editorial mail company;

PayShop: utility services pay net service;

Phone-ix: mobile communications operator;

Tourline Express: express mail service (Spain).