Search for features that overlap a list of genome coordinates you enter or upload, e.g. I:100000..200000

1. Type/Paste in genomic regions in  base coordinate  interbase coordinate
   (click to see an example)
   
   or Upload genomic regions from a .txt file...
   
2. Extend your regions at both sides:
   1k| 10k| 100k| 1M| 10M|