If those characters were all digits, you could do it.
But number formatting works with numbers.
A few choices:
1. Type the data the way you want.
2. Type the data all bunched together, but use an adjacent cell to show what
you want.
3. Use a macro to convert the value to what you want.
If you're a beginner, I'd recommend either of the first two:
The formula may look something like this if you typed the entry in A1:
=left(a1,1)&" "&mid(a1,2,4)&...
But then I'm confused by your requirements. Next four digits followed by
remaining digits sound like they should be separated by a space or just plopped
together...
Maybe one of these:
=left(a1,1)&" "&mid(a1,2,4)&" "&mid(a1,5,255)
or
=left(a1,1)&" "&mid(a1,2,255)
That 255 can be any number as long as it's bigger than the number of characters
in A1.