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? |
|---|---|---|---|---|---|---|
| CM23 5HP | 51.871061 | 0.1891 | 550807 | 221430 | TL508214 | Yes |
| CM23 5HQ | 51.869219 | 0.17691 | 549974 | 221200 | TL499211 | Yes |
| CM23 5HR | 51.871011 | 0.183054 | 550391 | 221412 | TL503214 | Yes |
| CM23 5HS | 51.869019 | 0.168736 | 549412 | 221161 | TL494211 | Yes |
| CM23 5HT | 51.86907 | 0.17038 | 549525 | 221170 | TL495211 | Yes |
| CM23 5HU | 51.870133 | 0.169749 | 549478 | 221287 | TL494212 | Yes |
| CM23 5HW | 51.869292 | 0.175838 | 549900 | 221206 | TL498212 | Yes |
| CM23 5HX | 51.871059 | 0.171231 | 549577 | 221393 | TL495213 | Yes |
| CM23 5HY | 51.870384 | 0.168831 | 549414 | 221313 | TL494213 | Yes |
| CM23 5HZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5JA | 51.870538 | 0.167807 | 549343 | 221328 | TL493213 | Yes |
| CM23 5JB | 51.870774 | 0.17254 | 549668 | 221364 | TL496213 | Yes |
| CM23 5JD | 51.868804 | 0.173084 | 549712 | 221146 | TL497211 | Yes |
| CM23 5JE | 51.868934 | 0.173816 | 549762 | 221162 | TL497211 | Yes |
| CM23 5JF | 51.868501 | 0.179722 | 550170 | 221126 | TL501211 | Yes |
| CM23 5JG | 51.8689 | 0.17518 | 549856 | 221161 | TL498211 | Yes |
| CM23 5JH | 51.865489 | 0.174347 | 549810 | 220780 | TL498207 | Yes |
| CM23 5JJ | 51.866607 | 0.179558 | 550165 | 220915 | TL501209 | Yes |
| CM23 5JL | 51.86757 | 0.180476 | 550225 | 221024 | TL502210 | Yes |
| CM23 5JN | 51.869206 | 0.170285 | 549518 | 221185 | TL495211 | Yes |
| CM23 5JP | 51.863191 | 0.168804 | 549436 | 220513 | TL494205 | Yes |
| CM23 5JQ | 51.867622 | 0.176702 | 549965 | 221022 | TL499210 | Yes |
| CM23 5JR | 51.863315 | 0.171788 | 549641 | 220533 | TL496205 | Yes |
| CM23 5JS | 51.866243 | 0.168123 | 549379 | 220851 | TL493208 | Yes |
| CM23 5JT | 51.86494 | 0.168061 | 549379 | 220706 | TL493207 | Yes |
| CM23 5JU | 51.865814 | 0.167478 | 549336 | 220802 | TL493208 | Yes |
| CM23 5JW | 51.873389 | 0.177024 | 549968 | 221664 | TL499216 | No |
| CM23 5JX | 51.864476 | 0.168329 | 549399 | 220655 | TL493206 | Yes |
| CM23 5JY | 51.863346 | 0.170105 | 549525 | 220533 | TL495205 | Yes |
| CM23 5JZ | 51.871268 | 0.176457 | 549936 | 221427 | TL499214 | Yes |
| CM23 5LA | 51.862358 | 0.170072 | 549526 | 220423 | TL495204 | Yes |
| CM23 5LB | 51.864341 | 0.170283 | 549534 | 220644 | TL495206 | Yes |
| CM23 5LD | 51.864175 | 0.171975 | 549651 | 220629 | TL496206 | Yes |
| CM23 5LE | 51.862246 | 0.168803 | 549439 | 220408 | TL494204 | Yes |
| CM23 5LF | 51.862307 | 0.174281 | 549816 | 220426 | TL498204 | Yes |
| CM23 5LH | 51.863388 | 0.179548 | 550175 | 220557 | TL501205 | Yes |
| CM23 5LJ | 51.863211 | 0.173076 | 549730 | 220524 | TL497205 | Yes |
| CM23 5LL | 51.863 | 0.173748 | 549777 | 220502 | TL497205 | Yes |
| CM23 5LN | 51.863005 | 0.175433 | 549893 | 220506 | TL498205 | Yes |
| CM23 5LP | 51.865162 | 0.179866 | 550191 | 220755 | TL501207 | Yes |
| CM23 5LQ | 51.863693 | 0.182017 | 550344 | 220596 | TL503205 | Yes |
| CM23 5LR | 51.863821 | 0.179961 | 550202 | 220606 | TL502206 | Yes |
| CM23 5LS | 51.865736 | 0.179008 | 550130 | 220817 | TL501208 | Yes |
| CM23 5LT | 51.865191 | 0.178792 | 550117 | 220756 | TL501207 | Yes |
| CM23 5LU | 51.864558 | 0.178965 | 550131 | 220686 | TL501206 | Yes |
| CM23 5LW | 51.863528 | 0.175865 | 549921 | 220565 | TL499205 | Yes |
| CM23 5LX | 51.863715 | 0.17936 | 550161 | 220593 | TL501205 | Yes |
| CM23 5LY | 51.86379 | 0.168005 | 549379 | 220578 | TL493205 | No |
| CM23 5LZ | 51.864649 | 0.169673 | 549491 | 220677 | TL494206 | Yes |
| CM23 5NA | 51.868163 | 0.1664 | 549254 | 221061 | TL492210 | Yes |
| CM23 5NB | 51.86379 | 0.168005 | 549379 | 220578 | TL493205 | No |
| CM23 5ND | 51.869335 | 0.166253 | 549240 | 221191 | TL492211 | Yes |
| CM23 5NE | 51.867437 | 0.165769 | 549213 | 220979 | TL492209 | No |
| CM23 5NF | 51.866336 | 0.165992 | 549232 | 220857 | TL492208 | Yes |
| CM23 5NG | 51.868231 | 0.168567 | 549403 | 221073 | TL494210 | Yes |
| CM23 5NH | 51.867117 | 0.16847 | 549400 | 220949 | TL493209 | Yes |
| CM23 5NJ | 51.867752 | 0.17113 | 549581 | 221025 | TL495210 | Yes |
| CM23 5NL | 51.868009 | 0.173757 | 549761 | 221059 | TL497210 | Yes |
| CM23 5NN | 51.866577 | 0.168982 | 549437 | 220890 | TL494208 | Yes |
| CM23 5NP | 51.866348 | 0.170699 | 549556 | 220868 | TL495208 | Yes |
| CM23 5NQ | 51.86792 | 0.168349 | 549389 | 221038 | TL493210 | Yes |
| CM23 5NR | 51.864671 | 0.171432 | 549612 | 220683 | TL496206 | Yes |
| CM23 5NS | 51.866059 | 0.169291 | 549460 | 220833 | TL494208 | Yes |
| CM23 5NT | 51.86598 | 0.173078 | 549721 | 220832 | TL497208 | Yes |
| CM23 5NU | 51.865468 | 0.16964 | 549486 | 220768 | TL494207 | Yes |
| CM23 5NW | 51.86744 | 0.17341 | 549739 | 220995 | TL497209 | Yes |
| CM23 5NX | 51.865166 | 0.170425 | 549541 | 220736 | TL495207 | Yes |
| CM23 5NY | 51.873487 | 0.176622 | 549940 | 221674 | TL499216 | No |
| CM23 5NZ | 51.87066 | 0.180669 | 550228 | 221368 | TL502213 | Yes |
| CM23 5PA | 51.870826 | 0.178484 | 550077 | 221382 | TL500213 | Yes |
| CM23 5PB | 51.872852 | 0.176897 | 549961 | 221604 | TL499216 | Yes |
| CM23 5PD | 51.872168 | 0.17743 | 550000 | 221529 | TL499215 | Yes |
| CM23 5PE | 51.872088 | 0.176409 | 549930 | 221518 | TL499215 | Yes |
| CM23 5PF | 51.871439 | 0.179385 | 550137 | 221452 | TL501214 | No |
| CM23 5PG | 51.871916 | 0.177447 | 550002 | 221501 | TL500215 | No |
| CM23 5PH | 51.872841 | 0.176039 | 549902 | 221601 | TL499216 | No |
| CM23 5PJ | 51.871817 | 0.178866 | 550100 | 221493 | TL500214 | Yes |
| CM23 5PL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5PN | 51.871115 | 0.179907 | 550174 | 221417 | TL501214 | Yes |
| CM23 5PP | 51.884035 | 0.174662 | 549770 | 222843 | TL497228 | Yes |
| CM23 5PQ | 51.873389 | 0.177024 | 549968 | 221664 | TL499216 | No |
| CM23 5PR | 51.864832 | 0.175362 | 549882 | 220709 | TL498207 | Yes |
| CM23 5PS | 51.885891 | 0.175943 | 549852 | 223052 | TL498230 | Yes |
| CM23 5PW | 51.866838 | 0.178233 | 550073 | 220938 | TL500209 | Yes |
| CM23 5PX | 51.866422 | 0.177399 | 550017 | 220890 | TL500208 | Yes |
| CM23 5PY | 51.875203 | 0.173276 | 549704 | 221858 | TL497218 | Yes |
| CM23 5PZ | 51.86623 | 0.17662 | 549964 | 220867 | TL499208 | Yes |
| CM23 5QU | 51.870284 | 0.182511 | 550356 | 221330 | TL503213 | Yes |
| CM23 5QW | 51.873495 | 0.176637 | 549941 | 221675 | TL499216 | No |
| CM23 5QX | 51.872321 | 0.185646 | 550565 | 221563 | TL505215 | Yes |
| CM23 5QY | 51.871757 | 0.18649 | 550625 | 221502 | TL506215 | Yes |
| CM23 5RA | 51.870641 | 0.183603 | 550430 | 221372 | TL504213 | Yes |
| CM23 5RB | 51.871704 | 0.185456 | 550554 | 221494 | TL505214 | Yes |
| CM23 5RD | 51.871043 | 0.185191 | 550538 | 221420 | TL505214 | Yes |
| CM23 5RE | 51.869545 | 0.181138 | 550264 | 221245 | TL502212 | Yes |
| CM23 5RF | 51.873303 | 0.176831 | 549955 | 221654 | TL499216 | No |
| CM23 5RG | 51.873613 | 0.189166 | 550803 | 221714 | TL508217 | Yes |
| CM23 5RH | 51.873495 | 0.176637 | 549941 | 221675 | TL499216 | No |
| CM23 5RJ | 51.870909 | 0.183209 | 550402 | 221401 | TL504214 | No |
| CM23 5RL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5RN | 51.863992 | 0.181364 | 550298 | 220628 | TL502206 | Yes |
| CM23 5RP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5RQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5RR | 51.863992 | 0.181364 | 550298 | 220628 | TL502206 | No |
| CM23 5RS | 51.86379 | 0.168005 | 549379 | 220578 | TL493205 | Yes |
| CM23 5RT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5RX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5SA | 51.873487 | 0.176622 | 549940 | 221674 | TL499216 | No |
| CM23 5SB | 51.869216 | 0.166814 | 549279 | 221179 | TL492211 | Yes |
| CM23 5SD | 51.867611 | 0.16707 | 549302 | 221001 | TL493210 | No |
| CM23 5SE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5SH | 51.868228 | 0.168713 | 549413 | 221073 | TL494210 | Yes |
| CM23 5SJ | 51.868721 | 0.16785 | 549352 | 221126 | TL493211 | Yes |
| CM23 5SW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5SZ | 51.869326 | 0.171569 | 549606 | 221201 | TL496212 | Yes |
| CM23 5TB | 51.862466 | 0.171529 | 549626 | 220438 | TL496204 | Yes |
| CM23 5TT | 51.871306 | 0.180279 | 550199 | 221439 | TL501214 | Yes |
| CM23 5WA | 51.862466 | 0.171529 | 549626 | 220438 | TL496204 | No |
| CM23 5WB | 51.862466 | 0.171529 | 549626 | 220438 | TL496204 | No |
| CM23 5WD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WL | 51.871306 | 0.180279 | 550199 | 221439 | TL501214 | No |
| CM23 5WN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5WZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5XH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 5XT | 51.871306 | 0.180279 | 550199 | 221439 | TL501214 | No |
| CM23 5YB | 51.862466 | 0.171529 | 549626 | 220438 | TL496204 | No |
| CM23 5YF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | Yes |
| CM23 5YR | 51.862466 | 0.171529 | 549626 | 220438 | TL496204 | No |
| CM23 9AA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AR | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AS | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9AZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | Yes |
| CM23 9BB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BR | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BS | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9BZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DD | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DF | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DH | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DJ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DL | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DN | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DP | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DQ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DR | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | Yes |
| CM23 9DS | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DT | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DU | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DW | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DX | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DY | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9DZ | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9EA | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9EB | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9ED | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |
| CM23 9EE | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | Yes |
| CM23 9EG | 51.866763 | 0.160362 | 548843 | 220893 | TL488208 | No |