8.9 years ago by
Maastricht, The Netherlands
I may have completely misunderstood your question, but if you got the SNP positions yourself using your own gene sequences the only thing you need to know is the start and end positions of the genes in these sequences and it will immediately be clear which SNPs are upstream or downstream.
If I misunderstood this might be the dumbest answer ever. The example coordinates you gave are so low that I started to think that these are single gene sequences, that might be wrong.