All block ranges start with a value where (cp MOD 16) = 0,
and end with a value where (cp MOD 16) = 15.
In other words,
the last hexadecimal digit of the start of range is …0
and the last hexadecimal digit of the end of range is …F.
This constraint on block ranges guarantees that allocations
are done in terms of whole columns, and that code chart display
never involves splitting columns in the charts.
All code points not explicitly listed for Block
have the value No_Block.
Wikidata entity IDs related to code blocks are