[Question] Region ID change ?

[multiuses]

hi there
i just want to know how to change the Region ID
or where is the table which controls this function
for an example Jupiter has a 90 region ID
where did this 90 world id came ?
and how to change it with another number ?
if someone knows please share with me
i really appreciate everybody's help
thnaks

[Media.]

Jupiter does not have the RegionID 90. The "region" is a small part of the map, jupiter has many regions.

An example: RegionID:23248 X:208 Y:90 is in the Mirror Dimension.
X and Y describes the location of the region, while the ID is to identify it.

A (possible) fomula for the region number is as follows:
Region = (Y * 256) + X

So for the example:
(90 * 256) + 208 = 23248

Probably badly explained, but I tried.