This is a list of postcodes in the CO11 9 area covering the areas of Manningtree, Tendring.
 Active postcode
Active postcode 
   Postcode no longer in use
Postcode no longer in use| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? | 
|---|---|---|---|---|---|---|
| CO11 9AA | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AB | 0 | 0 | No | |||
| CO11 9AD | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AE | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AF | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AG | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AH | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AJ | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AL | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AN | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | Yes | 
| CO11 9AP | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AQ | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | Yes | 
| CO11 9AR | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AS | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AT | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AU | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AW | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AX | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AY | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9AZ | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BA | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BB | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BD | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BE | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | Yes | 
| CO11 9BG | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BH | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | No | 
| CO11 9BJ | 51.945243 | 1.062795 | 610598 | 231847 | TM105318 | Yes |