This page provides postcode data for the Hertfordshire English ceremonial county. Hertfordshire contains approximately 453,814 households with a population of about 1,116,078 (2011 census)
| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? |
|---|---|---|---|---|---|---|
| CM21 9QA | 51.812181 | 0.151353 | 548402 | 214805 | TL484148 | Yes |
| CM21 9QD | 51.812547 | 0.148585 | 548210 | 214840 | TL482148 | Yes |
| CM21 9QE | 51.813233 | 0.147965 | 548165 | 214915 | TL481149 | Yes |
| CM21 9QF | 51.813097 | 0.148495 | 548202 | 214901 | TL482149 | No |
| CM21 9QG | 51.812372 | 0.151246 | 548394 | 214826 | TL483148 | Yes |
| CM21 9QH | 51.812958 | 0.150172 | 548318 | 214889 | TL483148 | Yes |
| CM21 9QJ | 51.815205 | 0.149756 | 548282 | 215138 | TL482151 | Yes |
| CM21 9QL | 51.812856 | 0.149848 | 548296 | 214877 | TL482148 | Yes |
| CM21 9QN | 51.815449 | 0.149187 | 548242 | 215164 | TL482151 | Yes |
| CM21 9QP | 51.810082 | 0.145697 | 548019 | 214560 | TL480145 | Yes |
| CM21 9QS | 51.81234 | 0.154466 | 548616 | 214829 | TL486148 | No |
| CM21 9QU | 51.81528 | 0.148135 | 548170 | 215143 | TL481151 | Yes |
| CM21 9QW | 51.815052 | 0.150257 | 548317 | 215122 | TL483151 | Yes |
| CM21 9QY | 51.81492 | 0.147131 | 548102 | 215101 | TL481151 | No |
| CM21 9RE | 51.809894 | 0.14563 | 548015 | 214539 | TL480145 | Yes |
| CM21 9RP | 51.81234 | 0.154466 | 548616 | 214829 | TL486148 | No |
| CM21 9TA | 51.812145 | 0.151352 | 548402 | 214801 | TL484148 | No |
| CM21 9TB | 51.812145 | 0.151352 | 548402 | 214801 | TL484148 | No |
| CM21 9TD | 51.8124 | 0.151712 | 548426 | 214830 | TL484148 | Yes |
| CM21 9WA | 51.8124 | 0.151712 | 548426 | 214830 | TL484148 | No |
| CM21 9WZ | 51.8124 | 0.151712 | 548426 | 214830 | TL484148 | No |
| CM21 9XQ | 51.8124 | 0.151712 | 548426 | 214830 | TL484148 | No |
| CM21 9ZW | 51.8124 | 0.151712 | 548426 | 214830 | TL484148 | No |
| CM22 6BX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6ES | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6EX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6GH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6GL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6GZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6JN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6JT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6JU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6JY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6JZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6LW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6PN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6QF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6TE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6UB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6UW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6UX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6UY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6UZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WR | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WS | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6WZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6XZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 6YY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7AF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7DF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7DJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7DQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7EQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7EW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7FP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7GZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7NY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7PA | 51.852214 | 0.167144 | 549358 | 219289 | TL493192 | Yes |
| CM22 7PB | 51.853236 | 0.16638 | 549302 | 219401 | TL493194 | No |
| CM22 7PD | 51.851439 | 0.166294 | 549302 | 219201 | TL493192 | No |
| CM22 7PW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7QA | 51.854239 | 0.167067 | 549346 | 219514 | TL493195 | Yes |
| CM22 7QD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7QE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7QH | 51.857674 | 0.169498 | 549502 | 219901 | TL495199 | No |
| CM22 7QJ | 51.859044 | 0.170319 | 549554 | 220055 | TL495200 | Yes |
| CM22 7RX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7SD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7SE | 51.836633 | 0.159167 | 548860 | 217540 | TL488175 | Yes |
| CM22 7SR | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7SS | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7SZ | 51.836245 | 0.16121 | 549002 | 217501 | TL490175 | No |
| CM22 7US | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7WZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7XD | 51.853369 | 0.159125 | 548802 | 219401 | TL488194 | No |
| CM22 7XF | 51.853262 | 0.164929 | 549202 | 219401 | TL492194 | No |
| CM22 7XP | 51.853262 | 0.164929 | 549202 | 219401 | TL492194 | No |
| CM22 7XQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7XZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7YA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7YT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM22 7YX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 0AA | 51.883817 | 0.149832 | 548062 | 222768 | TL480227 | Yes |
| CM23 0AB | 51.883238 | 0.151025 | 548146 | 222706 | TL481227 | Yes |
| CM23 0AD | 51.883559 | 0.150662 | 548120 | 222741 | TL481227 | Yes |
| CM23 0AE | 51.883551 | 0.150095 | 548081 | 222739 | TL480227 | Yes |
| CM23 0AG | 51.883553 | 0.150008 | 548075 | 222739 | TL480227 | Yes |
| CM23 0AH | 51.883936 | 0.152642 | 548255 | 222787 | TL482227 | Yes |
| CM23 0AJ | 51.883091 | 0.151657 | 548190 | 222691 | TL481226 | Yes |
| CM23 0AL | 51.883584 | 0.152233 | 548228 | 222747 | TL482227 | Yes |
| CM23 0AN | 51.88343 | 0.153766 | 548334 | 222733 | TL483227 | Yes |
| CM23 0AP | 51.883731 | 0.154507 | 548384 | 222768 | TL483227 | Yes |
| CM23 0AQ | 51.88381 | 0.15515 | 548428 | 222778 | TL484227 | Yes |
| CM23 0AS | 51.884183 | 0.154892 | 548409 | 222819 | TL484228 | Yes |
| CM23 0AT | 51.884227 | 0.155926 | 548480 | 222826 | TL484228 | Yes |
| CM23 0AU | 51.884263 | 0.157395 | 548581 | 222833 | TL485228 | Yes |
| CM23 0AW | 51.883676 | 0.157062 | 548560 | 222767 | TL485227 | Yes |
| CM23 0AX | 51.884029 | 0.157427 | 548584 | 222807 | TL485228 | Yes |
| CM23 0AZ | 51.88187 | 0.150596 | 548121 | 222553 | TL481225 | Yes |
| CM23 0BB | 51.881974 | 0.149817 | 548067 | 222563 | TL480225 | Yes |
| CM23 0BD | 51.881626 | 0.151631 | 548193 | 222528 | TL481225 | Yes |
| CM23 0BE | 51.882335 | 0.151694 | 548195 | 222607 | TL481226 | Yes |
| CM23 0BF | 51.881478 | 0.15036 | 548106 | 222509 | TL481225 | Yes |
| CM23 0BG | 51.882481 | 0.15109 | 548153 | 222622 | TL481226 | Yes |
| CM23 0BH | 51.882253 | 0.15076 | 548131 | 222596 | TL481225 | Yes |
| CM23 0BJ | 51.881979 | 0.152476 | 548250 | 222569 | TL482225 | Yes |
| CM23 0BL | 51.885157 | 0.150797 | 548124 | 222919 | TL481229 | Yes |
| CM23 0BN | 51.884475 | 0.150706 | 548120 | 222843 | TL481228 | Yes |
| CM23 0BP | 51.884726 | 0.149294 | 548022 | 222868 | TL480228 | Yes |
| CM23 0BQ | 51.88551 | 0.150698 | 548116 | 222958 | TL481229 | Yes |
| CM23 0BR | 51.884635 | 0.149333 | 548025 | 222858 | TL480228 | Yes |
| CM23 0BS | 51.884828 | 0.150127 | 548079 | 222881 | TL480228 | Yes |
| CM23 0BT | 51.884828 | 0.150127 | 548079 | 222881 | TL480228 | Yes |
| CM23 0BU | 51.884812 | 0.150025 | 548072 | 222879 | TL480228 | Yes |
| CM23 0DG | 51.885443 | 0.154865 | 548403 | 222959 | TL484229 | Yes |
| CM23 0DL | 51.884828 | 0.150127 | 548079 | 222881 | TL480228 | Yes |
| CM23 0DP | 51.884987 | 0.155701 | 548462 | 222910 | TL484229 | Yes |
| CM23 1BU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 1BW | 51.885972 | 0.166167 | 549179 | 223041 | TL491230 | Yes |
| CM23 1EJ | 51.886251 | 0.166152 | 549177 | 223072 | TL491230 | Yes |
| CM23 1EL | 51.886181 | 0.165552 | 549136 | 223063 | TL491230 | Yes |
| CM23 1EN | 51.886618 | 0.165762 | 549149 | 223112 | TL491231 | Yes |
| CM23 1EP | 51.885954 | 0.166689 | 549215 | 223040 | TL492230 | Yes |
| CM23 1EQ | 51.885704 | 0.16707 | 549242 | 223013 | TL492230 | Yes |
| CM23 1ER | 51.885697 | 0.167912 | 549300 | 223014 | TL492230 | Yes |
| CM23 1ES | 51.886425 | 0.167933 | 549299 | 223095 | TL492230 | Yes |
| CM23 1ET | 51.886163 | 0.168996 | 549373 | 223068 | TL493230 | Yes |
| CM23 1EU | 51.886436 | 0.168834 | 549361 | 223098 | TL493230 | Yes |
| CM23 1EW | 51.886839 | 0.168447 | 549333 | 223142 | TL493231 | Yes |
| CM23 1EX | 51.886907 | 0.169133 | 549380 | 223151 | TL493231 | Yes |
| CM23 1EY | 51.886395 | 0.165664 | 549143 | 223087 | TL491230 | Yes |
| CM23 1EZ | 51.886342 | 0.165139 | 549107 | 223080 | TL491230 | Yes |
| CM23 1FA | 51.886919 | 0.164556 | 549065 | 223143 | TL490231 | Yes |
| CM23 1FB | 51.887315 | 0.168964 | 549367 | 223196 | TL493231 | Yes |
| CM23 1FD | 51.88763 | 0.1694 | 549396 | 223232 | TL493232 | Yes |
| CM23 1FE | 51.887052 | 0.170027 | 549441 | 223169 | TL494231 | Yes |
| CM23 1FF | 51.887359 | 0.170434 | 549468 | 223204 | TL494232 | Yes |
| CM23 1FG | 51.888434 | 0.171648 | 549548 | 223326 | TL495233 | Yes |
| CM23 1FH | 51.887726 | 0.170539 | 549474 | 223245 | TL494232 | Yes |
| CM23 1FJ | 51.888011 | 0.170683 | 549483 | 223277 | TL494232 | Yes |
| CM23 1FL | 51.888329 | 0.170989 | 549503 | 223313 | TL495233 | Yes |
| CM23 1FN | 51.888658 | 0.170714 | 549483 | 223349 | TL494233 | Yes |
| CM23 1FP | 51.887619 | 0.170998 | 549506 | 223234 | TL495232 | Yes |
| CM23 1FQ | 51.885643 | 0.164989 | 549099 | 223002 | TL490230 | Yes |
| CM23 1FR | 51.887136 | 0.16647 | 549196 | 223171 | TL491231 | Yes |
| CM23 1FS | 51.887026 | 0.165593 | 549136 | 223157 | TL491231 | Yes |
| CM23 1FT | 51.887347 | 0.165245 | 549111 | 223192 | TL491231 | Yes |
| CM23 1FU | 51.888519 | 0.16363 | 548996 | 223319 | TL489233 | Yes |
| CM23 1FW | 51.887596 | 0.164908 | 549087 | 223219 | TL490232 | Yes |
| CM23 1FX | 51.887939 | 0.16337 | 548980 | 223254 | TL489232 | Yes |
| CM23 1FY | 51.888314 | 0.164042 | 549025 | 223297 | TL490232 | Yes |
| CM23 1FZ | 51.888488 | 0.162844 | 548942 | 223314 | TL489233 | Yes |
| CM23 1GA | 51.887991 | 0.164477 | 549056 | 223262 | TL490232 | Yes |
| CM23 1GB | 51.888482 | 0.164166 | 549033 | 223316 | TL490233 | Yes |
| CM23 1GD | 51.889043 | 0.165429 | 549118 | 223381 | TL491233 | Yes |
| CM23 1GE | 51.888615 | 0.165757 | 549142 | 223334 | TL491233 | Yes |
| CM23 1GF | 51.888402 | 0.165587 | 549131 | 223310 | TL491233 | Yes |
| CM23 1GG | 51.888615 | 0.166701 | 549207 | 223336 | TL492233 | Yes |
| CM23 1GH | 51.88874 | 0.16726 | 549245 | 223351 | TL492233 | Yes |
| CM23 1GJ | 51.888755 | 0.167885 | 549288 | 223354 | TL492233 | Yes |
| CM23 1GL | 51.888644 | 0.168577 | 549336 | 223343 | TL493233 | Yes |
| CM23 1GQ | 51.887318 | 0.168296 | 549321 | 223195 | TL493231 | Yes |
| CM23 1GR | 51.888709 | 0.161619 | 548857 | 223336 | TL488233 | Yes |
| CM23 1GS | 51.888063 | 0.165919 | 549155 | 223273 | TL491232 | Yes |
| CM23 1HA | 51.892871 | 0.182152 | 550256 | 223841 | TL502238 | Yes |
| CM23 1JB | 51.890224 | 0.157943 | 548599 | 223497 | TL485234 | Yes |
| CM23 1JD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 1JE | 51.889818 | 0.157531 | 548572 | 223451 | TL485234 | No |