NCK, NSCK, CCK, and SPCK, what mean?

[Mirken]

NCK is the achronym of Network Code Key for the operator lock
NSCK is the achronym of Network Subside Code Key but for what is it? :-?
CCK and SPCK what mean and for what they are? :-?

thanx in advance


sorry for my english, maybe i made some errors. :-P

[ahib]

NCK-Net Code Key
NSCK= Net Subset Code Key
CCK= Corporate Code Key and
SPCK=Service Provider Code Key

I THINK;) I think, therefore I am! NO! that is wrong!- I AM, therefore I (should) THINK!

[Mirken]

thank you Ahib :)

do you know the usefulness of each one of the code?

many thanks