CM92 Harlow Postcode district CM92: 1 named streets and 18 live postcodes, in Harlow. Streets Sandringham Avenue, Harlow Postcodes CM92 1LA CM92 1LB CM92 1LD CM92 1LE CM92 1LF CM92 1LG CM92 1LH CM92 1LJ CM92 1LN CM92 1LP CM92 1LQ CM92 1LR CM92 1LS CM92 1LT CM92 1LU CM92 1LW CM92 1LX CM92 1LY Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.