Oftel records show that numbers starting 08705 are allocated to BT. Note that due to number portability if an individual number has moved to a different operator this information is not publicly available.
Oftel's last recorded change for this number range was December 2016.
The correct way to write telephone numbers beginning 08705 is in the format 0870 5xx xxxx
For more information on tariffs and usage of numbers starting 087 please visit the page on 087 numbers