1109 postboxes in the SN postcode area
| SN1 (47) | SN2 (46) | SN3 (64) | SN4 (70) | SN5 (52) | SN6 (63) | SN7 (43) | SN8 (136) | SN9 (48) |
| SN10 (97) | SN11 (61) | SN12 (56) | SN13 (45) | SN14 (89) | SN15 (108) | SN16 (53) | SN25 (25) | SN26 (6) |
Map boundaries are based on data from freethepostcode.org and npemap.org.uk.
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