DbSNP

the largest public database of SNPs, maintained by the National Institutes of Health.

http://www.ncbi.nlm.nih.gov/projects/SNP/

rs113993960 is one of several submissions to dbSNP by SNPedia

explanation of ncbi dbsnp in pdf

ftp files

FAQ

Easy to use mysql query interface https://cgsmd.isi.edu/dbsnpq/

ftp://ftp.ncbi.nih.gov/snp/organisms/human_9606/VCF/

http://biostars.org/show/tag/dbsnp/

everything is bulk downloadable at

• ftp://ftp.ncbi.nih.gov/snp/organisms/human_9606/VCF/00-All.vcf.gz
• ftp://ftp.ncbi.nih.gov/snp/organisms/human_9606/XML/

explanation of a particular field in the database ftp://ftp.ncbi.nlm.nih.gov/snp/specs/dbSNP_BitField_latest.pdf