Tell us about your experience with this number
The 0191 dialling code covers Sunderland and the surrounding area.
Number 0191 516 1645 is potentially valid.
Ofcom records show that numbers starting 0191516 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.
Ofcom's last recorded change for this number range was July 1994.
Phone numbers beginning 0191 are geographic numbers.