This is a list of postcodes in the SA4 1 area covering the areas of Blue Anchor, Gorseinon, Gowerton, Hendy (Carmarthenshire), Loughor, North Gower, Penllergaer, Penclawdd, Pontarddulais, Three Crosses, Swansea.
 Active postcode
Active postcode 
   Postcode no longer in use
Postcode no longer in use| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? | 
|---|---|---|---|---|---|---|
| SA4 1PE | 51.715941 | -4.032243 | 259703 | 203868 | SN597038 | No | 
| SA4 1PF | 51.715678 | -4.032882 | 259659 | 203840 | SN596038 | No | 
| SA4 1PG | 51.717304 | -4.031406 | 259766 | 204018 | SN597040 | No | 
| SA4 1PH | 51.71728 | -4.032274 | 259706 | 204017 | SN597040 | No | 
| SA4 1PJ | 51.718651 | -4.031524 | 259762 | 204168 | SN597041 | No | 
| SA4 1PL | 51.717248 | -4.030521 | 259826 | 204010 | SN598040 | No | 
| SA4 1PN | 51.717674 | -4.030323 | 259841 | 204057 | SN598040 | No | 
| SA4 1PP | 51.718968 | -4.027253 | 260058 | 204195 | SN600041 | No | 
| SA4 1PQ | 51.717403 | -4.030904 | 259801 | 204028 | SN598040 | No | 
| SA4 1PR | 51.718032 | -4.02779 | 260018 | 204092 | SN600040 | No | 
| SA4 1PS | 51.718322 | -4.027166 | 260062 | 204123 | SN600041 | No | 
| SA4 1PT | 51.719842 | -4.029739 | 259889 | 204297 | SN598042 | No | 
| SA4 1PU | 51.721522 | -4.03035 | 259852 | 204485 | SN598044 | No | 
| SA4 1PW | 51.71942 | -4.031269 | 259782 | 204253 | SN597042 | No | 
| SA4 1PX | 51.72061 | -4.03264 | 259691 | 204388 | SN596043 | No | 
| SA4 1PY | 51.722869 | -4.029976 | 259882 | 204634 | SN598046 | No | 
| SA4 1PZ | 51.723955 | -4.02849 | 259988 | 204752 | SN599047 | No | 
| SA4 1QA | 51.722871 | -4.027761 | 260035 | 204630 | SN600046 | No | 
| SA4 1QB | 51.723851 | -4.022548 | 260398 | 204729 | SN603047 | No | 
| SA4 1QD | 51.729154 | -4.033646 | 259648 | 205340 | SN596053 | No | 
| SA4 1QE | 51.724681 | -4.031795 | 259762 | 204839 | SN597048 | No | 
| SA4 1QF | 51.72453 | -4.035321 | 259518 | 204829 | SN595048 | No | 
| SA4 1QG | 51.728883 | -4.027465 | 260074 | 205298 | SN600052 | No | 
| SA4 1QH | 51.740672 | -4.022242 | 260471 | 206599 | SN604065 | No | 
| SA4 1QJ | 51.747341 | -4.015151 | 260981 | 207327 | SN609073 | No | 
| SA4 1QL | 51.681443 | -3.997266 | 262015 | 199965 | SS620999 | No | 
| SA4 1QN | 51.72506 | -4.022834 | 260382 | 204864 | SN603048 | No | 
| SA4 1QP | 51.732091 | -4.016616 | 260833 | 205634 | SN608056 | No | 
| SA4 1QQ | 51.728378 | -4.027529 | 260068 | 205242 | SN600052 | No | 
| SA4 1QR | 51.732428 | -4.034647 | 259589 | 205706 | SN595057 | No | 
| SA4 1QS | 51.68213 | -3.994924 | 262179 | 200037 | SN621000 | No | 
| SA4 1QT | 51.713015 | -4.041246 | 259072 | 203560 | SN590035 | No | 
| SA4 1QU | 51.712306 | -4.040157 | 259146 | 203479 | SN591034 | No | 
| SA4 1QW | 51.683023 | -3.998999 | 261900 | 200144 | SN618001 | No | 
| SA4 1QX | 51.711873 | -4.041252 | 259069 | 203433 | SN590034 | No | 
| SA4 1QY | 51.682688 | -4.00017 | 261818 | 200109 | SN618001 | No | 
| SA4 1QZ | 51.683237 | -3.998025 | 261968 | 200166 | SN619001 | No | 
| SA4 1RA | 51.713148 | -4.038255 | 259280 | 203569 | SN592035 | No | 
| SA4 1RB | 51.711692 | -4.039232 | 259208 | 203409 | SN592034 | No | 
| SA4 1RD | 51.712547 | -4.039748 | 259175 | 203505 | SN591035 | No | 
| SA4 1RE | 51.713879 | -4.039693 | 259182 | 203653 | SN591036 | No | 
| SA4 1RF | 51.713359 | -4.038019 | 259296 | 203592 | SN592035 | No | 
| SA4 1RG | 51.713497 | -4.040428 | 259131 | 203612 | SN591036 | No | 
| SA4 1RH | 51.714351 | -4.038353 | 259276 | 203703 | SN592037 | No | 
| SA4 1RJ | 51.714733 | -4.038153 | 259292 | 203745 | SN592037 | No | 
| SA4 1RL | 51.715214 | -4.040462 | 259133 | 203803 | SN591038 | No | 
| SA4 1RN | 51.715413 | -4.037836 | 259316 | 203820 | SN593038 | No | 
| SA4 1RP | 51.716572 | -4.040465 | 259138 | 203954 | SN591039 | No | 
| SA4 1RQ | 51.713762 | -4.040208 | 259147 | 203641 | SN591036 | No | 
| SA4 1RR | 51.715187 | -4.040968 | 259098 | 203801 | SN590038 | No | 
| SA4 1RS | 51.715728 | -4.03937 | 259211 | 203858 | SN592038 | No | 
| SA4 1RT | 51.716075 | -4.038011 | 259305 | 203894 | SN593038 | No | 
| SA4 1RU | 51.718085 | -4.040823 | 259117 | 204123 | SN591041 | No | 
| SA4 1RW | 51.715593 | -4.036787 | 259389 | 203838 | SN593038 | No | 
| SA4 1RX | 51.682962 | -3.996783 | 262053 | 200133 | SN620001 | No | 
| SA4 1RY | 51.719321 | -4.039561 | 259209 | 204258 | SN592042 | No | 
| SA4 1RZ | 51.719322 | -4.038996 | 259248 | 204257 | SN592042 | No | 
| SA4 1SA | 51.715162 | -4.042414 | 258998 | 203801 | SN589038 | No | 
| SA4 1SB | 51.71993 | -4.042339 | 259019 | 204331 | SN590043 | No | 
| SA4 1SD | 51.718891 | -4.036892 | 259392 | 204205 | SN593042 | No | 
| SA4 1SE | 51.723218 | -4.036811 | 259411 | 204686 | SN594046 | No | 
| SA4 1SF | 51.683669 | -3.998058 | 261967 | 200214 | SN619002 | No | 
| SA4 1SG | 51.721739 | -4.039655 | 259210 | 204527 | SN592045 | No | 
| SA4 1SH | 51.719862 | -4.040034 | 259178 | 204319 | SN591043 | No | 
| SA4 1SJ | 51.716392 | -4.043599 | 258920 | 203940 | SN589039 | No | 
| SA4 1SL | 51.715864 | -4.036163 | 259432 | 203867 | SN594038 | No | 
| SA4 1SN | 51.720397 | -4.04029 | 259161 | 204379 | SN591043 | No | 
| SA4 1SP | 51.683944 | -3.997173 | 262029 | 200243 | SN620002 | No | 
| SA4 1SQ | 51.727474 | -4.045995 | 258790 | 205177 | SN587051 | No | 
| SA4 1SR | 51.714022 | -4.040249 | 259145 | 203670 | SN591036 | No | 
| SA4 1SS | 51.714425 | -4.040846 | 259105 | 203716 | SN591037 | No | 
| SA4 1ST | 51.714281 | -4.04139 | 259066 | 203701 | SN590037 | No | 
| SA4 1SU | 51.714264 | -4.042374 | 258998 | 203701 | SN589037 | No | 
| SA4 1SW | 51.683962 | -3.996147 | 262100 | 200243 | SN620002 | No | 
| SA4 1SX | 51.714264 | -4.042374 | 258998 | 203701 | SN589037 | No | 
| SA4 1SY | 51.714704 | -4.042379 | 258999 | 203750 | SN589037 | No | 
| SA4 1SZ | 51.715085 | -4.043221 | 258943 | 203794 | SN589037 | No | 
| SA4 1TA | 51.714452 | -4.041861 | 259034 | 203721 | SN590037 | No | 
| SA4 1TB | 51.714159 | -4.042195 | 259011 | 203689 | SN590036 | No | 
| SA4 1TD | 51.71357 | -4.043993 | 258884 | 203627 | SN588036 | No | 
| SA4 1TE | 51.715453 | -4.042239 | 259011 | 203833 | SN590038 | No | 
| SA4 1TF | 51.715204 | -4.056487 | 258027 | 203833 | SN580038 | No | 
| SA4 1TG | 51.724748 | -4.058397 | 257925 | 204898 | SN579048 | No | 
| SA4 1TH | 51.715705 | -4.044321 | 258868 | 203865 | SN588038 | No | 
| SA4 1TJ | 51.71616 | -4.048612 | 258573 | 203924 | SN585039 | No | 
| SA4 1TL | 51.716342 | -4.045406 | 258795 | 203938 | SN587039 | No | 
| SA4 1TN | 51.71747 | -4.047252 | 258672 | 204067 | SN586040 | No | 
| SA4 1TP | 51.718605 | -4.051256 | 258398 | 204201 | SN583042 | No | 
| SA4 1TQ | 51.714473 | -4.043787 | 258902 | 203727 | SN589037 | No | 
| SA4 1TR | 51.71596 | -4.048241 | 258598 | 203901 | SN585039 | No | 
| SA4 1TS | 51.722986 | -4.054249 | 258205 | 204694 | SN582046 | No | 
| SA4 1TT | 51.724792 | -4.055909 | 258096 | 204898 | SN580048 | No | 
| SA4 1TU | 51.723625 | -4.058317 | 257927 | 204773 | SN579047 | No | 
| SA4 1TW | 51.72057 | -4.051518 | 258387 | 204420 | SN583044 | No | 
| SA4 1TX | 51.722015 | -4.055262 | 258132 | 204588 | SN581045 | No | 
| SA4 1TY | 51.723135 | -4.056529 | 258048 | 204715 | SN580047 | No | 
| SA4 1TZ | 51.724218 | -4.057852 | 257960 | 204838 | SN579048 | No | 
| SA4 1UA | 51.722038 | -4.05755 | 257975 | 204595 | SN579045 | No | 
| SA4 1UB | 51.719817 | -4.053931 | 258218 | 204341 | SN582043 | No | 
| SA4 1UD | 51.716414 | -4.053661 | 258226 | 203962 | SN582039 | No | 
| SA4 1UE | 51.718716 | -4.052636 | 258304 | 204216 | SN583042 | No | 
| SA4 1UF | 51.71616 | -4.048612 | 258573 | 203924 | SN585039 | No | 
| SA4 1UG | 51.717793 | -4.050394 | 258455 | 204109 | SN584041 | No | 
| SA4 1UH | 51.719597 | -4.05214 | 258341 | 204313 | SN583043 | No | 
| SA4 1UJ | 51.718777 | -4.05122 | 258402 | 204220 | SN584042 | No | 
| SA4 1UL | 51.71616 | -4.048134 | 258606 | 203923 | SN586039 | No | 
| SA4 1UN | 51.715797 | -4.047814 | 258627 | 203882 | SN586038 | No | 
| SA4 1UP | 51.714251 | -4.052912 | 258270 | 203720 | SN582037 | No | 
| SA4 1UQ | 51.716073 | -4.044844 | 258833 | 203907 | SN588039 | No | 
| SA4 1UR | 51.71513 | -4.051461 | 258373 | 203815 | SN583038 | No | 
| SA4 1US | 51.716001 | -4.050023 | 258476 | 203909 | SN584039 | No | 
| SA4 1UT | 51.713424 | -4.051861 | 258340 | 203626 | SN583036 | No | 
| SA4 1UU | 51.713777 | -4.054801 | 258138 | 203671 | SN581036 | No | 
| SA4 1UW | 51.714862 | -4.050348 | 258449 | 203783 | SN584037 | No | 
| SA4 1UX | 51.712364 | -4.055924 | 258056 | 203516 | SN580035 | No | 
| SA4 1UY | 51.714559 | -4.055343 | 258104 | 203759 | SN581037 | No | 
| SA4 1UZ | 51.714265 | -4.056213 | 258042 | 203728 | SN580037 | No | 
| SA4 1WA | 51.679926 | -4.009205 | 261185 | 199819 | SS611998 | No | 
| SA4 1WB | 51.677384 | -4.012737 | 260933 | 199543 | SS609995 | No | 
| SA4 1WD | 51.673419 | -4.014803 | 260778 | 199106 | SS607991 | No | 
| SA4 1WE | 51.66922 | -4.01424 | 260804 | 198638 | SS608986 | No | 
| SA4 1WF | 51.66514 | -4.01928 | 260443 | 198194 | SS604981 | No | 
| SA4 1WG | 51.66667 | -4.015544 | 260706 | 198357 | SS607983 | No | 
| SA4 1WH | 51.671941 | -4.021781 | 260291 | 198955 | SS602989 | No | 
| SA4 1WJ | 51.666093 | -4.026075 | 259976 | 198313 | SS599983 | No | 
| SA4 1WL | 51.663788 | -4.022068 | 260246 | 198049 | SS602980 | No | 
| SA4 1WN | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1WP | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WQ | 51.670752 | -4.016666 | 260641 | 198813 | SS606988 | No | 
| SA4 1WR | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WS | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WT | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WU | 51.664244 | -4.022768 | 260199 | 198101 | SS601981 | No | 
| SA4 1WW | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WX | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1WY | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1WZ | 51.70664 | -4.026138 | 260096 | 202822 | SN600028 | No | 
| SA4 1XA | 51.712801 | -4.057117 | 257975 | 203567 | SN579035 | No | 
| SA4 1XB | 51.711182 | -4.058693 | 257861 | 203390 | SN578033 | No | 
| SA4 1XD | 51.708569 | -4.059486 | 257799 | 203101 | SN577031 | No | 
| SA4 1XE | 51.712827 | -4.05871 | 257865 | 203573 | SN578035 | No | 
| SA4 1XF | 51.714627 | -4.059689 | 257804 | 203775 | SN578037 | No | 
| SA4 1XG | 51.7143 | -4.060384 | 257754 | 203740 | SN577037 | No | 
| SA4 1XH | 51.712076 | -4.062599 | 257594 | 203497 | SN575034 | No | 
| SA4 1XJ | 51.714455 | -4.06181 | 257656 | 203760 | SN576037 | No | 
| SA4 1XL | 51.713862 | -4.062289 | 257622 | 203695 | SN576036 | No | 
| SA4 1XN | 51.711846 | -4.060837 | 257715 | 203468 | SN577034 | No | 
| SA4 1XP | 51.712262 | -4.053531 | 258221 | 203500 | SN582034 | No | 
| SA4 1XQ | 51.714363 | -4.060908 | 257718 | 203748 | SN577037 | No | 
| SA4 1XR | 51.712029 | -4.0596 | 257801 | 203486 | SN578034 | No | 
| SA4 1XS | 51.712239 | -4.05531 | 258099 | 203501 | SN580035 | No | 
| SA4 1XT | 51.702607 | -4.040401 | 259099 | 202401 | SN590024 | No | 
| SA4 1XU | 51.718433 | -4.06367 | 257540 | 204206 | SN575042 | No | 
| SA4 1XW | 51.74493 | -4.047986 | 258707 | 207122 | SN587071 | No | 
| SA4 1XX | 51.718433 | -4.06367 | 257540 | 204206 | SN575042 | No | 
| SA4 1XY | 51.716302 | -4.069755 | 257113 | 203981 | SN571039 | No | 
| SA4 1XZ | 51.716302 | -4.069755 | 257113 | 203981 | SN571039 | No | 
| SA4 1YA | 51.725285 | -4.082039 | 256293 | 205004 | SN562050 | No | 
| SA4 1YB | 51.711151 | -4.073746 | 256821 | 203416 | SN568034 | No | 
| SA4 1YD | 51.711461 | -4.068896 | 257158 | 203441 | SN571034 | No | 
| SA4 1YE | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1YF | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1YG | 51.70664 | -4.026138 | 260096 | 202822 | SN600028 | No | 
| SA4 1YH | 51.718173 | -4.075848 | 256698 | 204201 | SN566042 | No | 
| SA4 1YJ | 51.720194 | -4.060174 | 257787 | 204395 | SN577043 | No | 
| SA4 1YL | 51.727015 | -4.072141 | 256982 | 205177 | SN569051 | No | 
| SA4 1YN | 51.725591 | -4.063156 | 257598 | 205001 | SN575050 | No | 
| SA4 1YP | 51.725406 | -4.054735 | 258179 | 204964 | SN581049 | No | 
| SA4 1YQ | 51.719352 | -4.089497 | 255759 | 204359 | SN557043 | No | 
| SA4 1YR | 51.735059 | -4.05452 | 258225 | 206037 | SN582060 | No | 
| SA4 1YS | 51.742533 | -4.047718 | 258718 | 206855 | SN587068 | No | 
| SA4 1YT | 51.745152 | -4.049169 | 258626 | 207149 | SN586071 | No | 
| SA4 1YU | 51.745357 | -4.043572 | 259013 | 207161 | SN590071 | No | 
| SA4 1YW | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1YX | 51.74781 | -4.031224 | 259873 | 207410 | SN598074 | No | 
| SA4 1YY | 51.742504 | -4.048875 | 258638 | 206854 | SN586068 | No | 
| SA4 1YZ | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1ZA | 51.70664 | -4.026138 | 260096 | 202822 | SN600028 | No | 
| SA4 1ZD | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1ZE | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1ZF | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No | 
| SA4 1ZG | 51.705594 | -4.034645 | 259505 | 202722 | SN595027 | No | 
| SA4 1ZH | 51.681128 | -3.994648 | 262195 | 199925 | SS621999 | No | 
| SA4 1ZJ | 51.681128 | -3.994648 | 262195 | 199925 | SS621999 | No | 
| SA4 1ZL | 51.681128 | -3.994648 | 262195 | 199925 | SS621999 | No | 
| SA4 1ZN | 51.747711 | -4.032291 | 259799 | 207401 | SN597074 | No | 
| SA4 1ZP | 51.669816 | -3.994584 | 262165 | 198667 | SS621986 | No | 
| SA4 1ZQ | 51.681128 | -3.994648 | 262195 | 199925 | SS621999 | No | 
| SA4 1ZR | 51.669765 | -3.993367 | 262249 | 198659 | SS622986 | No | 
| SA4 1ZS | 51.669936 | -3.99336 | 262250 | 198678 | SS622986 | No | 
| SA4 1ZT | 51.670545 | -3.993503 | 262242 | 198746 | SS622987 | No | 
| SA4 1ZU | 51.622636 | -3.995965 | 261926 | 193423 | SS619934 | No | 
| SA4 1ZX | 51.574717 | -3.998441 | 261609 | 188099 | SS616880 | No |