Initially access the Ensembl "Homo sapiens" genome section
In the top box, input your identifier (gene, Location, transcript or Karyotype), select the link to the location or the one for the "region in details" You should now be on the region in detail page (You will get there directly if you put in a map location) You will need, on the left to click on "configure this page"
Alternatively, you can use the NCBI Clone DB (http://www.ncbi.nlm.nih.gov/clone/). This is a very good site for finding out any available detailed clone information (associated sequences, related clones etc). Search using the clne ID (e.g. RP11-37E23).
If you require further assistance, please do not hesitate to contact us Lifescience.firstname.lastname@example.org