S99 Sheffield Postcode district S99: 1 named streets and 35 live postcodes, in Sheffield. Streets Brightside Lane, Sheffield Postcodes S99 1AA S99 1AB S99 1AD S99 1AG S99 1AH S99 1AJ S99 1AL S99 1AN S99 1AP S99 1AQ S99 1AR S99 1AS S99 1AT S99 1AU S99 1AW S99 1AX S99 1AY S99 1AZ S99 1BA S99 1BB S99 1BD S99 1BE S99 1BF S99 2AA S99 2AB S99 2AD S99 2AE S99 2AH S99 2AJ S99 2AP S99 2AQ S99 2AR S99 2AS S99 3AD S99 3AE Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.