IACS Compliant Field Numbers
While MAGIC does not store IACS data, IACS compliant field numbers can now be viewed using the Where am I? 
tool in the interactive map – see the help library for details of how this tool works.
Below is an explanation of how IACS compliant field numbers are formed from the grid reference of a location. For example the full grid reference 339151, 157851 equates to the IACS compliance reference ST39571585. The relationship between a field number in IACS format and a grid reference is as follows:
If you require specific IACS or Rural Land Register field numbers, we advise that you speak to the Rural Payments Agency.