LE21 Leicester Postcode district LE21: 2 named streets and 13 live postcodes, in Leicester and Blaby. Streets Campbell Street, Leicester Centurion Way, Leicester Postcodes LE21 3FJ LE21 3FN LE21 3FP LE21 3FQ LE21 4BU LE21 4BW LE21 4BX LE21 4BY LE21 4DE LE21 4DY LE21 9BN LE21 9FN LE21 9FP Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.