CM21 is a postcode district in East Hertfordshire, UK. Below is a complete list of CM21 Postcodes (Active). CM21 postcode district comprises of 315 active postcodes and 3 postcode sectors. CM21 district has a population of 10865, and it has 4686 properties in the region.
| Population | 10865 |
| Addresses / Property Count | 4686 |
| Active Postcodes | 315 |
| Nearby Postcode Districts | 27 |
| Active Postcode Sectors | 3 |
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| Postcode | Latitude | Longitude | Households | Population | Easting | Northing |
|---|---|---|---|---|---|---|
| CM21 9AT | 51.81376600 | 0.15176300 | 28 | 73 | 548425 | 214982 |
| CM21 9AX | 51.81262200 | 0.15134600 | 20 | 38 | 548400 | 214854 |
| CM21 9AY | 51.81513100 | 0.15093100 | 5 | 9 | 548363 | 215132 |
| CM21 9AZ | 51.81486500 | 0.15023600 | 31 | 54 | 548316 | 215101 |
| CM21 9BA | 51.81475600 | 0.14922700 | 11 | 24 | 548247 | 215087 |
| CM21 9BB | 51.81404400 | 0.14942800 | 42 | 105 | 548263 | 215008 |
| CM21 9BD | 51.81353800 | 0.15542500 | 25 | 60 | 548678 | 214964 |
| CM21 9BE | 51.81267700 | 0.15531100 | 7 | 11 | 548673 | 214868 |
| CM21 9BG | 51.81199100 | 0.15594600 | 42 | 104 | 548719 | 214793 |
| CM21 9BH | 51.81122700 | 0.15445900 | 10 | 19 | 548619 | 214705 |
| CM21 9BJ | 51.81223500 | 0.15440500 | 36 | 85 | 548612 | 214817 |
| CM21 9BL | 51.81379000 | 0.15344900 | 6 | 14 | 548541 | 214988 |
| CM21 9BN | 51.81159700 | 0.15633300 | 9 | 24 | 548747 | 214750 |
| CM21 9BQ | 51.81222500 | 0.15691500 | 26 | 61 | 548785 | 214821 |
| CM21 9BS | 51.81650300 | 0.14909300 | 14 | 34 | 548232 | 215281 |
| CM21 9BU | 51.81894500 | 0.14992300 | 46 | 104 | 548281 | 215554 |
| CM21 9BW | 51.81352600 | 0.15070900 | 9 | 9 | 548353 | 214953 |
| CM21 9BX | 51.82049500 | 0.15020000 | 2 | 6 | 548295 | 215727 |
| CM21 9BY | 51.82083500 | 0.14934500 | N/A | N/A | 548235 | 215763 |
| CM21 9BZ | 51.82332100 | 0.15352700 | 9 | 16 | 548515 | 216048 |
| CM21 9DA | 51.81368100 | 0.14859800 | 12 | 15 | 548207 | 214966 |
| CM21 9DB | 51.81551300 | 0.15219700 | 13 | 26 | 548449 | 215177 |
| CM21 9DD | 51.81728900 | 0.15235100 | 17 | 39 | 548454 | 215375 |
| CM21 9DE | 51.81793800 | 0.15139800 | 7 | 17 | 548386 | 215445 |
| CM21 9DF | 51.81948500 | 0.15184900 | 45 | 119 | 548412 | 215618 |
| CM21 9DG | 51.81818800 | 0.15244000 | 9 | 22 | 548457 | 215475 |
| CM21 9DH | 51.81741700 | 0.15282400 | 12 | 31 | 548486 | 215390 |
| CM21 9DJ | 51.81792400 | 0.15363200 | 22 | 34 | 548540 | 215448 |
| CM21 9DL | 51.81775700 | 0.15283800 | 2 | 5 | 548486 | 215428 |
| CM21 9DN | 51.81934300 | 0.15271300 | 42 | 107 | 548472 | 215604 |
| CM21 9DP | 51.82103500 | 0.15315600 | 12 | 19 | 548497 | 215793 |
| CM21 9DQ | 51.81831800 | 0.15125700 | 21 | 32 | 548375 | 215487 |
| CM21 9DR | 51.82050700 | 0.15349400 | 29 | 68 | 548522 | 215735 |
| CM21 9DS | 51.82089400 | 0.15397700 | 15 | 30 | 548554 | 215779 |
| CM21 9DT | 51.82061800 | 0.15528400 | 21 | 44 | 548645 | 215751 |
| CM21 9DU | 51.81974100 | 0.15409600 | 22 | 51 | 548566 | 215651 |
| CM21 9DW | 51.82089700 | 0.15181500 | 22 | 55 | 548405 | 215775 |
| CM21 9DX | 51.81925000 | 0.15434800 | 44 | 93 | 548585 | 215597 |
| CM21 9DY | 51.81837100 | 0.15080900 | 40 | 102 | 548344 | 215492 |
| CM21 9EA | 51.81766400 | 0.15063100 | 10 | 19 | 548334 | 215413 |
| CM21 9EB | 51.81554500 | 0.15047200 | 21 | 61 | 548330 | 215177 |
| CM21 9ED | 51.82328900 | 0.15429400 | 5 | 11 | 548568 | 216046 |
| CM21 9EF | 51.81330900 | 0.15029300 | 5 | 18 | 548325 | 214928 |
| CM21 9EH | 51.81109600 | 0.14590800 | 15 | 28 | 548030 | 214673 |
| CM21 9EJ | 51.80969600 | 0.14526100 | 5 | 19 | 547990 | 214516 |
| CM21 9EL | 51.81073600 | 0.14630900 | 2 | 5 | 548059 | 214634 |
| CM21 9EN | 51.81247900 | 0.14736300 | 1 | 4 | 548126 | 214830 |
| CM21 9EP | 51.81165500 | 0.14726900 | 9 | 28 | 548122 | 214738 |
| CM21 9ER | 51.81031600 | 0.14666600 | 21 | 23 | 548085 | 214588 |
| CM21 9ES | 51.81063100 | 0.14674100 | 19 | 59 | 548089 | 214623 |