Postal sector NN1 3
- Robert Street, Northampton, NN1 3AE
- Ladys Lane, Northampton, NN1 3AH
- Wellington Street, Northampton, NN1 3AS
- Earl Street, Northampton, NN1 3AU
- Earl Street, Northampton, NN1 3AX
- Duke Street, Northampton, NN1 3BA
- Duke Street, Northampton, NN1 3BE
- Charles Street, Northampton, NN1 3BG
- Cranstoun Street, Northampton, NN1 3BH
- Robert Street, Northampton, NN1 3BJ
- Robert Street, Northampton, NN1 3BL
- Duke Street, Northampton, NN1 3BN
- Connaught Street, Northampton, NN1 3BP
- Charles Street, Northampton, NN1 3BQ
- Great Russell Street, Northampton, NN1 3BU
- Margaret Street, Northampton, NN1 3BW
- Louise Road, Northampton, NN1 3BY
- Barrack Road, Northampton, NN1 3DA
- Lower Mounts, Northampton, NN1 3DE
- Robert Street, Northampton, NN1 3DJ
- Dunster Street, Northampton, NN1 3DL
- Upper Mounts, Northampton, NN1 3DN
- Watkin Terrace, Northampton, NN1 3DP
- Campbell Street, Northampton, NN1 3DS
- Bailiff Street, Northampton, NN1 3DX
- Bailiff Street, Northampton, NN1 3DY
- Bailiff Street, Northampton, NN1 3DZ
- Bailiff Street, Northampton, NN1 3EA
- Campbell Square, Northampton, NN1 3EB
- Thomas Street, Northampton, NN1 3EN
- Oakley Street, Northampton, NN1 3EP
- Watkin Terrace, Northampton, NN1 3ER
- Beaconsfield Terrace, Northampton, NN1 3ES
- Military Road, Northampton, NN1 3ET
- Military Road, Northampton, NN1 3EU
- William Street, Northampton, NN1 3EW
- Poole Street, Northampton, NN1 3EX
- Austin Street, Northampton, NN1 3EY
- Craven Street, Northampton, NN1 3EZ
- Military Road, Northampton, NN1 3FB
- Lawrence Court, Northampton, NN1 3HB
- Lawrence Court, Northampton, NN1 3HD
- Deal Court, Northampton, NN1 3HE
- Oak Street, Northampton, NN1 3HH
- Ladys Lane, Northampton, NN1 3HQ
- Deal Street, Northampton, NN1 3HS
- Ash Street, Northampton, NN1 3HW
- Ash Street, Northampton, NN1 3HX
- Clare Street, Northampton, NN1 3JA
- Clare Street, Northampton, NN1 3JD
- Clare Street, Northampton, NN1 3JE
- Clare Street, Northampton, NN1 3JF
- Clare Street, Northampton, NN1 3JG
- Overstone Road, Northampton, NN1 3JH
- Overstone Road, Northampton, NN1 3JL
- Clare Street, Northampton, NN1 3JQ
- Overstone Road, Northampton, NN1 3JS
- St. Michaels Road, Northampton, NN1 3JT
- St. Michaels Road, Northampton, NN1 3JU
- Overstone Road, Northampton, NN1 3JW
- St. Michaels Road, Northampton, NN1 3JX
- Dunster Street, Northampton, NN1 3JY
- Dunster Street, Northampton, NN1 3LB
- Alcombe Terrace, Northampton, NN1 3LD
- Alcombe Road, Northampton, NN1 3LE
- Alcombe Road, Northampton, NN1 3LF
- Grove Road, Northampton, NN1 3LG
- Grove Road, Northampton, NN1 3LH
- Grove Road, Northampton, NN1 3LJ
- Cloutsham Street, Northampton, NN1 3LL
- Cloutsham Street, Northampton, NN1 3LN
- Queens Road, Northampton, NN1 3LP
- Grove Road, Northampton, NN1 3LQ
- Spencer Road, Northampton, NN1 3LR
- Clare Street, Northampton, NN1 3LS
- Grove Road, Northampton, NN1 3LT
- Somerset Street, Northampton, NN1 3LW
- Campbell Square, Northampton, NN1 3LZ
- Wellington Street, Northampton, NN1 3NA
- Wellington Street, Northampton, NN1 3NB
- Wellington Street, Northampton, NN1 3ND
- Latymer Court, Northampton, NN1 3NE
- Church Lane, Northampton, NN1 3NL
- Victoria Street, Northampton, NN1 3NR
- Colwyn Road, Northampton, NN1 3PU
- Colwyn Road, Northampton, NN1 3PX
- Colwyn Road, Northampton, NN1 3PZ
- Hunter Street, Northampton, NN1 3QA
- Hunter Street, Northampton, NN1 3QB
- Hunter Street, Northampton, NN1 3QD
- Burns Street, Northampton, NN1 3QE
- Shakespeare Road, Northampton, NN1 3QF
- Shakespeare Road, Northampton, NN1 3QG
- Hervey Street, Northampton, NN1 3QJ
- Hervey Street, Northampton, NN1 3QL
- Carey Street, Northampton, NN1 3QN
- Shakespeare Road, Northampton, NN1 3QP
- Gray Street, Northampton, NN1 3QQ
- Cowper Street, Northampton, NN1 3QR
- Hood Street, Northampton, NN1 3QS
- Hood Street, Northampton, NN1 3QT
- Hood Street, Northampton, NN1 3QU
- Cowper Street, Northampton, NN1 3QW
- Cowper Street, Northampton, NN1 3QX
- Barrack Road, Northampton, NN1 3RE
- Barrack Road, Northampton, NN1 3RF
- Barrack Road, Northampton, NN1 3RJ
- Barrack Road, Northampton, NN1 3RL
- Lorne Road, Northampton, NN1 3RN
- Louise Road, Northampton, NN1 3RP
- Barrack Road, Northampton, NN1 3RQ
- Louise Road, Northampton, NN1 3RR
- Leicester Street, Northampton, NN1 3RS