I don't have a clue but emobiletracker.com is a resource I use in these circumstances.
That does not give personal details, name, address etc registered with a mobile but it does give the network details of valid mobile numbers.
As a UK number, 07689264596 comes up with no network details and the valid number record comes up as false.
That is a strong indication that the number has been spoofed (falsified) so it could be from anywhere. Unfortunately that does mean that if they call you again it could appear to be from a completely different number.
So, in my opinion, whoever has been calling you, they are up to no good. 😉
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We’d constantly receive nuisance calls until we bought a call blocking phone. Now any caller not on the allow list has to announce who they are & press a key, we then have the choice of accepting or denying the call. Naturally scammers won’t bother doing that. Never had a scam/nuisance call since.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.