Why some SNP’s are not assigned to any gene?

Hi everyone,

I am doing polygenic risk analysis (PRS) ; As you may know PRS is done based on SNP’s. On the other hand, I would like to do some visualizations at gene level. Thus, I used rsnps library (ncbi_snp_query command) to map SNP’s on genes. I shared the image of the result which is a csv file. As you see, some SNP’s are not assigned to a gene. I would like to know what the possible reasons are.

FYI: rsnps library extracts information from dbsnp belonged to NCBI.

Thanks in advance