In UK, of late there have been persistent calls to my landline from
01284 197475.
A prerecorded female voice informs me that my BT telephone line will be terminated. "To prevent this, Press1"
This is probably located overseas, but dressed up to look like a UK number.
No doubt I would be connected to some extortionately costly line.
A similar scam intended to open my computer to a virus, to open my address book, or any financial details is where a message arrives to the effect that my Internet connection will be terminated within 24 hours.
"To prevent this, click on the link".
If it needs to be said "DON'T"!
Howard