Welcome.

It would help us a great deal if you could provide more information in the future as mentioned in this thread.

The geographical number for Hampshire Constabulary is 01962 841534 (taken from the unverified list but it works).

As for specifically Andover Police Station, South Street, Andover, SP10 2ED, I wasn't able to find one.

Try asking for front desk number yourself for Andover Police Station when your try Hampshire Constabulary switchboard next but state you have tried on numerous occasions and its always engaged but this costs you money because you have to ring the switchboard first whereas the direct number for the front desk wont cost you anything if you ring and its engaged.