KZN02
This made be late for the Kanoka disks, but after knowing a few digits of pi and codes ...

Pi: 3.14 159 265 358 979323846264 338 3 279 50288 41971 69399 37510

The codes that have digits in Pi are 314, 159, 265, 358, 338, and 279.

Probably a conincidence ...

Interesting?