Spam calls rarely increase at random. Something put your number on a list, or on more lists, and the timing of the spike is often the best clue. Working out the likely cause helps you choose the right fix, because a data breach needs a different response from a quote form you filled in last week.
The usual causes
| Cause | Typical sign |
|---|---|
| You filled in an online form | Calls about the same product: insurance, solar panels, loans, claims |
| Your data was in a breach | Scam calls or texts that use your name, or a breach notification email |
| You answered or rang back spam | More calls in the days after |
| Your number was recycled | Calls asking for a person you don't know, or about debts that aren't yours |
| A wider scam campaign | Neighbours, friends or colleagues get the same calls |
Forms are the most underrated cause
What nobody tells you is how often the "spam" is technically consented. Comparison sites, quote forms and prize draws often include a box allowing "partners" to contact you. Those details can be passed between lead generators, so one form can lead to calls from companies you've never heard of. When a caller says you agreed to be contacted, ask where and when. If they can't say, report the call to the ICO.
What brings the numbers down
- Register with the Telephone Preference Service. It's free and cuts legitimate UK sales calls within about 28 days.
- Stop answering unknown numbers for a couple of weeks. Numbers that don't answer become less valuable to diallers.
- Use your phone's filtering: Silence Unknown Callers on iPhone, or caller ID and spam protection on Android.
- Report persistent numbers to 7726 and add reports on Who Rang.
- If you have a BT landline, use Call Protect by dialling 1572.
- Check whether your email address appears in known data breaches and change reused passwords.
When it's more than spam
If the calls use your personal details, mention debts you don't have or ask you to confirm security information, treat them as possible fraud attempts rather than marketing. Don't confirm anything, contact the organisation on its official number and consider adding a security password with your mobile network.
For a more aggressive plan when the calls run to dozens a day, see how to stop getting 20 spam calls a day. And if you're wondering whether the new fines will help, our article on nuisance call fines under the Data (Use and Access) Act explains who they will and won't stop.