Sequeros
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Sequeros is a municipality located in the province of Salamanca, Castile and León, Spain. As of 2016 the municipality has a population of 237 inhabitants.
Postal code
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A postal code is a series of letters or digits or both, sometimes including spaces or punctuation, included in a postal address for the purpose of sorting mail.
Post office sign in Farrer, Australian Capital Territory, showing postcode 2607
1977 Soviet stamp promoting the use of postal codes