| Reference |
post code |
location 1 |
location 2 |
| SS1 600 | SS1 1AA | SOUTHEND SORTING OFFICE | 21 SHORT STREET |
| SS1 311 | SS1 1AB | CENTRAL STATION | |
| SS1 119 | SS1 1DY | ROYAL TERRACE | |
| SS1 1 | SS1 1EF | NELSON STREET | |
| SS1 136 | SS1 1JP | QUEENS ROAD POST OFFICE | |
| SS1 1365 | SS1 1JP | QUEENS ROAD BO | |
| SS1 1366 | SS1 1JP | QUEENS ROAD BO | |
| SS1 1367 | SS1 1JP | QUEENS ROAD BO | |
| SS1 1368 | SS1 1JP | QUEENS ROAD BO | SOUTHEND ON SEA |
| SS1 45 | SS1 1NE | ELMER APPROACH | SOUTHEND |
| SS1 455 | SS1 1NE | ELMER APPROACH | SOUTHEND |
| SS1 7 | SS1 1NF | GORDON ROAD | |
| SS1 37 | SS1 1NL | QUEENS ROAD | |
| SS1 11 | SS1 1PJ | MILTON ROAD | |
| SS1 9 | SS1 2AN | YORK ROAD | |
| SS1 21 | SS1 2DZ | 180 YORK ROAD | |
| SS1 9000 | SS1 2DZ | YORK ROAD | SOUTHEND-ON-SEA |
| SS1 4 | SS1 2EN | BRITTANIA P/HOUSE | |
| SS1 89 | SS1 2EQ | PIER HILL | |
| SS1 12 | SS1 2JN | WARRIOR SQUARE | |
| SS1 44 | SS1 2LS | LANCASTER GARDENS | |
| SS1 173 | SS1 2NE | SOUTHCHURCH ROAD | |
| SS1 116 | SS1 2PP | THE STRAND POST OFFICE | |
| SS1 52 | SS1 2QA | CHASE ROAD POST OFFICE | |
| SS1 325 | SS1 2SF | WOODGRANGE DRIVE POST OFFICE | |
| SS1 108 | SS1 2TZ | HAWTREE CLOSE | |
| SS1 254 | SS1 2UT | AMBLESIDE DRIVE | |
| SS1 361 | SS1 2XQ | LIFSTAN WAY | |
| SS1 185 | SS1 2YH | CHELSEA AVENUE | |
| SS1 121 | SS1 3AD | THORPE ESPLANADE POST OFFICE | |
| SS1 208 | SS1 3AU | JOHNSTONE ROAD | |
| SS1 158 | SS1 3BB | THORPE HALL AVENUE | |
| SS1 279 | SS1 3DQ | BRETTENHAM DRIVE | |
| SS1 377 | SS1 3EQ | WYATTS DRIVE | |
| SS1 169 | SS1 3EX | THORPE BAY POST OFFICE | |
| SS1 213 | SS1 3JJ | BURGESS ROAD | |
| SS1 357 | SS1 3JY | STATION ROAD | |
| SS1 274 | SS1 3LE | MARCUS AVENUE | |
| SS1 5 | SS1 3NT | 252 MAPLIN WAY NORTH | |
| SS1 376 | SS1 3PR | SAMUELS DRIVE | |
| SS1 352 | SS1 3QD | BRANSCOMBE WALK | |
| SS1 150 | SS1 3RB | BOURNES GREEN POST OFFICE | |
| SS1 200 | SS1 3SE | BURLESCOMBE ROAD | |
| SS1 15 | SS1 3SW | WANSFELL GARDENS | |
| SS1 6 | SS1 4UQ | SACKVILLE ROAD | |
Map boundaries are based on data from