Where do org prefixes get assigned?

[Rahilly, Ken]

Good Evening All,
 
Within our org structure all positions, roles, jobs etc.. were prefixed with
an 8
Recently another instance was brought on line and the numbers have
unexpectedly changed to a prefix of 6.
 
Anyone know off the top of the head where to go to reverse this prefix
number?
I didn't spot it under swld or on config.  It is a 3.1i environment.
 
Any help would be appreciated.
 
Regards,
 
-kr