| Reference |
post code |
location 1 |
location 2 |
| AL7 1 | | BURROWFIELDS | WELWYN GARDEN CITY |
| AL7 100 | | SWALLOWFIELDS | WELWYN GARDEN CITY |
| AL7 153 | | DIGSWELL P.O. | .WELWYN GARDEN CITY |
| AL7 182 | | CHEQUERS | WELWYN GARDEN CITY |
| AL7 184 | | PEARTREE | WELWYN GARDEN CITY |
| AL7 190 | | SYLVANDALE FORRESTERS ROAD | WELWYN GARDEN CITY |
| AL7 191 | | LUDWICK WAY/KNELLA ROAD | WELWYN GARDEN CITY |
| AL7 194 | | HYDE WAY | WELWYN GARDEN CITY |
| AL7 209 | | NEW WOOD | WELWYN GARDEN CITY |
| AL7 219 | | WOODHALL P.O | WELWYN GARDEN CITY |
| AL7 229 | | HUNTERS WAY | WELWYN GARDEN CITY |
| AL7 232 | | WOODHALL LANE | WELWYN GARDEN CITY |
| AL7 233 | | WHEATLEY ROAD | WELWYN GARDEN CITY |
| AL7 236 | | RAVENSFIELD BRIDGE ROAD EAST | WELWYN GARDEN CITY |
| AL7 237 | | HOLWELL ROAD | WELWYN GARDEN CITY |
| AL7 238 | | KNELLA GREEN | WELWYN GARDEN CITY |
| AL7 239 | | SHORTLANDS GREEN | WELWYN GARDEN CITY |
| AL7 251 | | GREAT GANETT | WELWYN GARDEN CITY |
| AL7 261 | | HERONSWOOD ROAD | WELWYN GARDEN CITY |
| AL7 262 | | BEEHIVE LANE | WELWYN GARDEN CITY |
| AL7 263 | | HALLGROVE P.O | WELWYN GARDEN CITY |
| AL7 265 | | HOWLANDS | WELWYN GARDEN CITY |
| AL7 276 | | LINKFIELD | WELWYN GARDEN CITY |
| AL7 277 | | THISTLE GROVE CAPONFIELD | WELWYN GARDEN CITY |
| AL7 282 | | THE COMMONS | WELWYN GARDEN CITY |
| AL7 283 | | BLYTHWAY/FALLOWFIELD | WELWYN GARDEN CITY |
| AL7 286 | | HOLLYRUSH | WELWYN GARDEN CITY |
| AL7 290 | | BESSEMER ROAD SORTING OFFICE | WELWYN GARDEN CITY |
| AL7 294 | | BROWNFIELDS | WELWYN GARDEN CITY |
| AL7 298 | | LODGE FIELD | WELWYN GARDEN CITY |
| AL7 300 | | HALDENS P.O | WELWYN GARDEN CITY |
| AL7 308 | | ROWANS | WELWYN GARDEN CITY |
| AL7 309 | | HERNS LANE | WELWYN GARDEN CITY |
| AL7 310 | | WESTFIELD | WELWYN GARDEN CITY |
| AL7 312 | | HAZEL GROVE | WELWYN GARDEN CITY |
| AL7 314 | | PANSHANGER | WELWYN GARDEN CITY |
| AL7 315 | | WATERFORD GREEN | WELWYN GARDEN CITY |
| AL7 316 | | BROADWATER ROAD | WELWYN GARDEN CITY |
| AL7 321 | | MARGERY WOOD/ ROWANS | WELWYN GARDEN CITY |
| AL7 323 | | SWALLOWFIELDS | WELWYN GARDEN CITY |
| AL7 326 | | LINCES WAY | WELWYN GARDEN CITY |
| AL7 328 | | SAFEWAYS PANSHANGER | WELWYN GARDEN CITY |
Map boundaries are based on data from