Eight British Overseas Territories use ten postal codes: three for Saint Helena, Ascension and Tristan da Cunha, and one apiece for the others.
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The validation may be strict (such as rejecting any address that does not have a valid postal code) or fuzzy (such as correcting records that partially match existing, known records).
Postal codes, such as ZIP codes (These are generally numeric in the United States, but other nations often use alphanumeric systems.)
The Château de Courson was built in 1676 in Courson-Monteloup (the postal code is 91680; INSEE code 91186), on the south-west outskirts of Paris, France.
Jatrabari Thana (Postal code: 1204) located at the starting point of Dhaka-Chittagong Highway and bordered with Motijheel & Demra Police Station.
The main postal head office in each region will have a postal code ending in 0001, so Garki Main HO in Abuja has the postal code 970001, Ikeja HO in Lagos has 100001, Lokoja in Kogi has 270001 and Port Harcourt has 500001.
The first two digits of the postal code denote the province or special administrative area (e.g. 43120 Phon Phisai, Nong Khai).