This is a list of postcodes in the NN18 9 area covering the areas of Great Oakley, Little Oakley, Corby. The area contains approximately 3,814 households with a population of about 9,046 (2011 census)
 Active postcode
Active postcode 
   Postcode no longer in use
Postcode no longer in use| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? | 
|---|---|---|---|---|---|---|
| NN18 9ZB | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZD | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZE | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZF | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZG | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZH | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZJ | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZL | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZN | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZP | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZQ | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | Yes | 
| NN18 9ZS | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZT | 52.475423 | -0.721835 | 486912 | 287156 | SP869871 | No | 
| NN18 9ZU | 52.475423 | -0.721835 | 486912 | 287156 | SP869871 | No | 
| NN18 9ZW | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZX | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZY | 52.494774 | -0.677952 | 489853 | 289362 | SP898893 | No | 
| NN18 9ZZ | 52.475423 | -0.721835 | 486912 | 287156 | SP869871 | No |