Looks up district, province, and primary city for a Sri Lankan 5-digit postal code. Returns PostalCodeInfo or null if not a recognized postal code range.
Postal code to look up.
District, province, and (for selected cities) the city, or null if the prefix is unknown.
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lookupPostalCode('20000')?.district; // 'Kandy'lookupPostalCode('00100')?.primaryCity; // 'Colombo 01 (Fort)' Copy
lookupPostalCode('20000')?.district; // 'Kandy'lookupPostalCode('00100')?.primaryCity; // 'Colombo 01 (Fort)'
Looks up district, province, and primary city for a Sri Lankan 5-digit postal code. Returns PostalCodeInfo or null if not a recognized postal code range.