The 2019 ENCODE list of regions that are poorly mapped (2019 https://doi.org/10.1038/s41598-019-45839-z). List downloaded from https://github.com/Boyle-Lab/Blacklist/blob/master/lists/ hg38-blacklist.v2.bed.gz and edited to remove "chr".
ENCODEbadRegionsA Granges object with 636 ranges:
chromosome
position on the chromosome
https://github.com/Boyle-Lab/Blacklist/blob/master/lists/ hg38-blacklist.v2.bed.gz