This is a list of postcodes in the YO4 area covering the areas of Pocklington, Market Weighton, Escrick, Stamford Bridge, York (no longer in use).
 Active postcode
Active postcode 
   Postcode no longer in use
Postcode no longer in use| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? | 
|---|---|---|---|---|---|---|
| YO4 1AA | 53.990858 | -0.913885 | 471308 | 455525 | SE713555 | No | 
| YO4 1AB | 53.991368 | -0.911675 | 471452 | 455584 | SE714555 | No | 
| YO4 1AD | 53.992021 | -0.911338 | 471473 | 455657 | SE714556 | No | 
| YO4 1AE | 53.991783 | -0.911832 | 471441 | 455630 | SE714556 | No | 
| YO4 1AF | 53.991408 | -0.915075 | 471229 | 455585 | SE712555 | No | 
| YO4 1AG | 53.991091 | -0.914885 | 471242 | 455550 | SE712555 | No | 
| YO4 1AH | 53.991313 | -0.926594 | 470474 | 455563 | SE704555 | No | 
| YO4 1AJ | 53.992254 | -0.917219 | 471087 | 455677 | SE710556 | No | 
| YO4 1AL | 53.992427 | -0.917429 | 471073 | 455696 | SE710556 | No | 
| YO4 1AN | 53.99203 | -0.916249 | 471151 | 455653 | SE711556 | No | 
| YO4 1AP | 53.999473 | -0.921426 | 470799 | 456476 | SE707564 | No | 
| YO4 1AQ | 53.991816 | -0.919443 | 470942 | 455626 | SE709556 | No | 
| YO4 1AR | 54.006244 | -0.901904 | 472067 | 457249 | SE720572 | No | 
| YO4 1AS | 54.012788 | -0.908935 | 471595 | 457970 | SE715579 | No | 
| YO4 1AT | 54.013169 | -0.883775 | 473243 | 458038 | SE732580 | No | 
| YO4 1AU | 54.014293 | -0.881913 | 473363 | 458165 | SE733581 | No | 
| YO4 1AW | 53.99479 | -0.916361 | 471139 | 455960 | SE711559 | No | 
| YO4 1AX | 53.992619 | -0.923815 | 470654 | 455711 | SE706557 | No | 
| YO4 1AY | 53.989945 | -0.911316 | 471478 | 455426 | SE714554 | No | 
| YO4 1AZ | 53.987317 | -0.921953 | 470785 | 455123 | SE707551 | No | 
| YO4 1BA | 53.986542 | -0.92266 | 470740 | 455036 | SE707550 | No | 
| YO4 1BB | 53.985232 | -0.923014 | 470719 | 454890 | SE707548 | No | 
| YO4 1BD | 53.985216 | -0.921169 | 470840 | 454890 | SE708548 | No | 
| YO4 1BE | 53.986221 | -0.923019 | 470717 | 455000 | SE707550 | No | 
| YO4 1BF | 53.98797 | -0.915622 | 471199 | 455202 | SE711552 | No | 
| YO4 1BG | 53.990639 | -0.913524 | 471332 | 455501 | SE713555 | No | 
| YO4 1BH | 53.990357 | -0.910237 | 471548 | 455473 | SE715554 | No | 
| YO4 1BJ | 53.990398 | -0.908802 | 471642 | 455479 | SE716554 | No | 
| YO4 1BL | 53.989699 | -0.907951 | 471699 | 455402 | SE716554 | No | 
| YO4 1BN | 53.989793 | -0.909459 | 471600 | 455411 | SE716554 | No | 
| YO4 1BP | 53.989705 | -0.912649 | 471391 | 455398 | SE713553 | No | 
| YO4 1BQ | 53.988841 | -0.912549 | 471399 | 455302 | SE713553 | No | 
| YO4 1BR | 53.990225 | -0.914481 | 471270 | 455454 | SE712554 | No | 
| YO4 1BS | 53.989578 | -0.915474 | 471206 | 455381 | SE712553 | No | 
| YO4 1BT | 53.989268 | -0.913972 | 471305 | 455348 | SE713553 | No | 
| YO4 1BU | 53.988784 | -0.913115 | 471362 | 455295 | SE713552 | No | 
| YO4 1BW | 53.989836 | -0.910236 | 471549 | 455415 | SE715554 | No | 
| YO4 1BX | 53.988608 | -0.912616 | 471395 | 455276 | SE713552 | No | 
| YO4 1BY | 53.988776 | -0.911239 | 471485 | 455296 | SE714552 | No | 
| YO4 1BZ | 53.989442 | -0.910414 | 471538 | 455371 | SE715553 | No | 
| YO4 1DA | 53.990756 | -0.906612 | 471785 | 455521 | SE717555 | No | 
| YO4 1DB | 53.988968 | -0.910609 | 471526 | 455318 | SE715553 | No | 
| YO4 1DD | 53.988064 | -0.913027 | 471369 | 455215 | SE713552 | No | 
| YO4 1DE | 53.988006 | -0.913654 | 471328 | 455208 | SE713552 | No | 
| YO4 1DF | 53.98862 | -0.913867 | 471313 | 455276 | SE713552 | No | 
| YO4 1DG | 53.988298 | -0.915049 | 471236 | 455239 | SE712552 | No | 
| YO4 1DH | 53.987259 | -0.915488 | 471209 | 455123 | SE712551 | No | 
| YO4 1DJ | 53.986741 | -0.915898 | 471183 | 455065 | SE711550 | No | 
| YO4 1DL | 53.986247 | -0.914935 | 471247 | 455011 | SE712550 | No | 
| YO4 1DN | 53.985884 | -0.915539 | 471208 | 454970 | SE712549 | No | 
| YO4 1DP | 53.986963 | -0.913513 | 471339 | 455092 | SE713550 | No | 
| YO4 1DQ | 53.987469 | -0.916871 | 471118 | 455145 | SE711551 | No | 
| YO4 1DR | 53.984835 | -0.915826 | 471191 | 454853 | SE711548 | No | 
| YO4 1DS | 53.984249 | -0.916573 | 471143 | 454787 | SE711547 | No | 
| YO4 1DT | 53.985561 | -0.914587 | 471271 | 454935 | SE712549 | No | 
| YO4 1DU | 53.985359 | -0.915034 | 471242 | 454912 | SE712549 | No | 
| YO4 1DW | 53.985161 | -0.917068 | 471109 | 454888 | SE711548 | No | 
| YO4 1DX | 53.984671 | -0.914503 | 471278 | 454836 | SE712548 | No | 
| YO4 1DY | 53.987129 | -0.916025 | 471174 | 455108 | SE711551 | No | 
| YO4 1DZ | 53.986067 | -0.917883 | 471054 | 454988 | SE710549 | No | 
| YO4 1EA | 53.974582 | -0.926002 | 470541 | 453702 | SE705537 | No | 
| YO4 1EB | 53.973555 | -0.925784 | 470557 | 453588 | SE705535 | No | 
| YO4 1ED | 53.968132 | -0.925405 | 470591 | 452985 | SE705529 | No | 
| YO4 1EE | 53.964668 | -0.905114 | 471928 | 452620 | SE719526 | No | 
| YO4 1EF | 53.967234 | -0.908538 | 471699 | 452902 | SE716529 | No | 
| YO4 1EG | 53.971385 | -0.90843 | 471699 | 453364 | SE716533 | No | 
| YO4 1EH | 53.972994 | -0.907442 | 471761 | 453544 | SE717535 | No | 
| YO4 1EJ | 53.974228 | -0.908676 | 471678 | 453680 | SE716536 | No | 
| YO4 1EL | 53.975515 | -0.907941 | 471724 | 453824 | SE717538 | No | 
| YO4 1EN | 53.97909 | -0.911659 | 471474 | 454218 | SE714542 | No | 
| YO4 1EP | 53.978807 | -0.896281 | 472483 | 454202 | SE724542 | No | 
| YO4 1EQ | 53.97295 | -0.907459 | 471760 | 453539 | SE717535 | No | 
| YO4 1ER | 53.98971 | -0.916172 | 471160 | 455395 | SE711553 | No | 
| YO4 1ES | 53.987326 | -0.919925 | 470918 | 455126 | SE709551 | No | 
| YO4 1ET | 53.985814 | -0.920757 | 470866 | 454957 | SE708549 | No | 
| YO4 1EU | 53.988249 | -0.918635 | 471001 | 455230 | SE710552 | No | 
| YO4 1EW | 53.972854 | -0.900967 | 472186 | 453535 | SE721535 | No | 
| YO4 1EX | 53.98816 | -0.919766 | 470927 | 455219 | SE709552 | No | 
| YO4 1EY | 53.987803 | -0.921041 | 470844 | 455178 | SE708551 | No | 
| YO4 1EZ | 53.984686 | -0.9122 | 471429 | 454840 | SE714548 | No | 
| YO4 1HA | 53.995453 | -0.897352 | 472384 | 456053 | SE723560 | No | 
| YO4 1HB | 53.999505 | -0.880585 | 473476 | 456521 | SE734565 | No | 
| YO4 1HD | 54.003307 | -0.865272 | 474473 | 456960 | SE744569 | No | 
| YO4 1HE | 54.003872 | -0.863288 | 474602 | 457025 | SE746570 | No | 
| YO4 1HF | 54.00418 | -0.861647 | 474709 | 457061 | SE747570 | No | 
| YO4 1HG | 53.997887 | -0.848272 | 475597 | 456375 | SE755563 | No | 
| YO4 1HH | 53.997729 | -0.867529 | 474335 | 456337 | SE743563 | No | 
| YO4 1HJ | 53.999032 | -0.874252 | 473892 | 456475 | SE738564 | No | 
| YO4 1HL | 53.999288 | -0.875663 | 473799 | 456502 | SE737565 | No | 
| YO4 1HN | 53.989885 | -0.865926 | 474454 | 455466 | SE744554 | No | 
| YO4 1HP | 53.989141 | -0.864284 | 474563 | 455385 | SE745553 | No | 
| YO4 1HQ | 54.001142 | -0.863515 | 474592 | 456721 | SE745567 | No | 
| YO4 1HR | 53.983081 | -0.851746 | 475396 | 454724 | SE753547 | No | 
| YO4 1HS | 53.976109 | -0.85491 | 475201 | 453945 | SE752539 | No | 
| YO4 1HT | 53.988801 | -0.866337 | 474429 | 455345 | SE744553 | No | 
| YO4 1HU | 53.981872 | -0.890436 | 472861 | 454549 | SE728545 | No | 
| YO4 1HW | 53.988876 | -0.862797 | 474661 | 455357 | SE746553 | No | 
| YO4 1HX | 53.981055 | -0.891525 | 472791 | 454457 | SE727544 | No | 
| YO4 1HY | 53.978669 | -0.881387 | 473460 | 454202 | SE734542 | No | 
| YO4 1HZ | 53.982727 | -0.893509 | 472658 | 454641 | SE726546 | No | 
| YO4 1JA | 54.009057 | -0.885288 | 473151 | 457579 | SE731575 | No | 
| YO4 1JB | 54.019136 | -0.884653 | 473175 | 458701 | SE731587 | No | 
| YO4 1JD | 54.031972 | -0.883821 | 473207 | 460130 | SE732601 | No | 
| YO4 1JE | 54.034145 | -0.854875 | 475099 | 460402 | SE750604 | No | 
| YO4 1JF | 54.042108 | -0.866263 | 474339 | 461276 | SE743612 | No | 
| YO4 1JG | 54.029208 | -0.860293 | 474753 | 459847 | SE747598 | No | 
| YO4 1JH | 54.017005 | -0.838007 | 476235 | 458513 | SE762585 | No | 
| YO4 1JJ | 53.99142 | -0.905512 | 471856 | 455596 | SE718555 | No | 
| YO4 1JL | 53.991902 | -0.909144 | 471617 | 455646 | SE716556 | No | 
| YO4 1JN | 53.991491 | -0.908377 | 471668 | 455601 | SE716556 | No | 
| YO4 1JP | 53.992006 | -0.906732 | 471775 | 455660 | SE717556 | No | 
| YO4 1JQ | 54.021814 | -0.854893 | 475120 | 459030 | SE751590 | No | 
| YO4 1JR | 53.992089 | -0.90496 | 471891 | 455671 | SE718556 | No | 
| YO4 1JS | 53.987973 | -0.949313 | 468990 | 455169 | SE689551 | No | 
| YO4 1JT | 53.988833 | -0.949047 | 469006 | 455265 | SE690552 | No | 
| YO4 1JU | 53.996296 | -0.941217 | 469507 | 456103 | SE695561 | No | 
| YO4 1JW | 53.991307 | -0.906903 | 471765 | 455582 | SE717555 | No | 
| YO4 1JX | 54.003428 | -0.950877 | 468862 | 456887 | SE688568 | No | 
| YO4 1JY | 54.003292 | -0.941543 | 469474 | 456881 | SE694568 | No | 
| YO4 1JZ | 54.015985 | -0.941832 | 469434 | 458293 | SE694582 | No | 
| YO4 1LA | 54.016561 | -0.937849 | 469694 | 458361 | SE696583 | No | 
| YO4 1LB | 54.018511 | -0.9378 | 469694 | 458578 | SE696585 | No | 
| YO4 1LD | 54.019417 | -0.93448 | 469910 | 458682 | SE699586 | No | 
| YO4 1LE | 54.02495 | -0.933148 | 469988 | 459299 | SE699592 | No | 
| YO4 1LF | 54.029743 | -0.928369 | 470293 | 459837 | SE702598 | No | 
| YO4 1LG | 54.023157 | -0.921486 | 470755 | 459111 | SE707591 | No | 
| YO4 1LH | 54.01567 | -0.919512 | 470897 | 458280 | SE708582 | No | 
| YO4 1LJ | 54.009661 | -0.921895 | 470751 | 457609 | SE707576 | No | 
| YO4 1LL | 54.016695 | -0.944851 | 469235 | 458369 | SE692583 | No | 
| YO4 1LN | 54.017195 | -0.963138 | 468036 | 458407 | SE680584 | No | 
| YO4 1LP | 53.992352 | -0.905182 | 471876 | 455700 | SE718557 | No | 
| YO4 1LQ | 53.991416 | -0.904108 | 471948 | 455597 | SE719555 | No | 
| YO4 1LR | 53.993072 | -0.906322 | 471800 | 455779 | SE718557 | No | 
| YO4 1LS | 53.986281 | -0.911655 | 471462 | 455018 | SE714550 | No | 
| YO4 1LT | 53.9859 | -0.913327 | 471353 | 454974 | SE713549 | No | 
| YO4 1LU | 54.016178 | -0.941247 | 469472 | 458315 | SE694583 | No | 
| YO4 1LW | 54.019779 | -0.973025 | 467384 | 458685 | SE673586 | No | 
| YO4 1LX | 53.987718 | -0.869661 | 474213 | 455221 | SE742552 | No | 
| YO4 1LY | 53.986405 | -0.867622 | 474349 | 455077 | SE743550 | No | 
| YO4 1LZ | 54.01691 | -0.97073 | 467539 | 458368 | SE675583 | No | 
| YO4 1NA | 53.997158 | -0.927893 | 470379 | 456212 | SE703562 | No | 
| YO4 1NB | 53.99008 | -0.940612 | 469557 | 455412 | SE695554 | No | 
| YO4 1NE | 53.988771 | -0.946075 | 469201 | 455261 | SE692552 | No | 
| YO4 1NF | 53.986998 | -0.952937 | 468754 | 455057 | SE687550 | No | 
| YO4 1NG | 53.98285 | -0.95757 | 468457 | 454591 | SE684545 | No | 
| YO4 1NH | 53.990931 | -0.944297 | 469314 | 455503 | SE693555 | No | 
| YO4 1NJ | 53.990588 | -0.944122 | 469326 | 455465 | SE693554 | No | 
| YO4 1NL | 53.990901 | -0.946052 | 469199 | 455498 | SE691554 | No | 
| YO4 1NN | 53.997407 | -0.957268 | 468453 | 456211 | SE684562 | No | 
| YO4 1NP | 53.982052 | -0.937278 | 469789 | 454522 | SE697545 | No | 
| YO4 1NQ | 53.989925 | -0.944353 | 469312 | 455391 | SE693553 | No | 
| YO4 1NR | 53.972311 | -0.944615 | 469324 | 453431 | SE693534 | No | 
| YO4 1NS | 53.958488 | -0.944704 | 469341 | 451893 | SE693518 | No | 
| YO4 1NT | 53.963094 | -0.948277 | 469099 | 452402 | SE690524 | No | 
| YO4 1NW | 53.990352 | -0.934779 | 469939 | 455448 | SE699554 | No | 
| YO4 1NX | 53.987339 | -0.86566 | 474476 | 455183 | SE744551 | No | 
| YO4 1NY | 53.988118 | -0.867271 | 474369 | 455268 | SE743552 | No | 
| YO4 1NZ | 53.988291 | -0.866595 | 474413 | 455288 | SE744552 | No | 
| YO4 1PA | 53.988662 | -0.918624 | 471001 | 455276 | SE710552 | No | 
| YO4 1PB | 53.987466 | -0.914476 | 471275 | 455147 | SE712551 | No | 
| YO4 1PD | 53.98606 | -0.916068 | 471173 | 454989 | SE711549 | No | 
| YO4 1PE | 53.989125 | -0.915089 | 471232 | 455331 | SE712553 | No | 
| YO4 1PF | 53.988667 | -0.909168 | 471621 | 455286 | SE716552 | No | 
| YO4 1PG | 53.987963 | -0.907859 | 471708 | 455209 | SE717552 | No | 
| YO4 1PH | 53.990378 | -0.907537 | 471725 | 455478 | SE717554 | No | 
| YO4 1PJ | 53.990399 | -0.907841 | 471705 | 455480 | SE717554 | No | 
| YO4 1PL | 53.991335 | -0.909037 | 471625 | 455583 | SE716555 | No | 
| YO4 1PN | 53.991583 | -0.909656 | 471584 | 455610 | SE715556 | No | 
| YO4 1PP | 53.985219 | -0.909593 | 471599 | 454902 | SE715549 | No | 
| YO4 1PQ | 53.985206 | -0.908069 | 471699 | 454902 | SE716549 | No | 
| YO4 1PR | 53.986554 | -0.909116 | 471628 | 455051 | SE716550 | No | 
| YO4 1PS | 53.985659 | -0.868618 | 474285 | 454993 | SE742549 | No | 
| YO4 1PT | 53.987619 | -0.911513 | 471469 | 455167 | SE714551 | No | 
| YO4 1PU | 53.987761 | -0.912394 | 471411 | 455182 | SE714551 | No | 
| YO4 1PW | 53.985219 | -0.909593 | 471599 | 454902 | SE715549 | No | 
| YO4 1PX | 53.987304 | -0.909509 | 471601 | 455134 | SE716551 | No | 
| YO4 1PY | 53.98718 | -0.906766 | 471781 | 455123 | SE717551 | No | 
| YO4 1PZ | 54.034411 | -0.844149 | 475801 | 460443 | SE758604 | No | 
| YO4 1QA | 53.998981 | -0.81201 | 477972 | 456536 | SE779565 | No | 
| YO4 1QB | 54.007156 | -0.793558 | 479166 | 457466 | SE791574 | No | 
| YO4 1QD | 54.005062 | -0.788187 | 479522 | 457239 | SE795572 | No | 
| YO4 1QG | 54.010903 | -0.822353 | 477272 | 457851 | SE772578 | No | 
| YO4 1QH | 54.013336 | -0.822162 | 477280 | 458122 | SE772581 | No | 
| YO4 1QJ | 54.011984 | -0.821712 | 477312 | 457972 | SE773579 | No | 
| YO4 1QL | 54.014248 | -0.881899 | 473364 | 458160 | SE733581 | No | 
| YO4 1QQ | 54.011199 | -0.825976 | 477034 | 457880 | SE770578 | No | 
| YO4 1QU | 54.014082 | -0.801187 | 478653 | 458228 | SE786582 | No | 
| YO4 1QX | 54.02125 | -0.791823 | 479253 | 459036 | SE792590 | No | 
| YO4 1QY | 54.017284 | -0.770341 | 480668 | 458619 | SE806586 | No | 
| YO4 1QZ | 54.022448 | -0.762847 | 481149 | 459202 | SE811592 | No | 
| YO4 1RG | 54.014253 | -0.758725 | 481435 | 458295 | SE814582 | No | 
| YO4 1RH | 54.024504 | -0.744467 | 482349 | 459452 | SE823594 | No | 
| YO4 1RJ | 54.022185 | -0.762656 | 481162 | 459173 | SE811591 | No | 
| YO4 1RL | 54.020592 | -0.769496 | 480717 | 458988 | SE807589 | No | 
| YO4 1RQ | 54.015372 | -0.739309 | 482705 | 458442 | SE827584 | No | 
| YO4 1RU | 53.984331 | -0.787827 | 479585 | 454933 | SE795549 | No | 
| YO4 1RX | 53.984595 | -0.788064 | 479569 | 454962 | SE795549 | No | 
| YO4 1RY | 53.991449 | -0.772688 | 480564 | 455742 | SE805557 | No | 
| YO4 1RZ | 53.98679 | -0.787451 | 479605 | 455207 | SE796552 | No | 
| YO4 1SA | 53.987199 | -0.786951 | 479637 | 455253 | SE796552 | No |