Your phone rang, you missed it, and now there is a number you do not recognise in your call log. No voicemail, no text. Should you ring it back?
Most of the time, no, not straight away. Check it first. Below we explain why, using what visitors to Who Calls You told us about the calls they received, and we give you a simple check that takes less than a minute.
What real call reports tell us
Between 26 October and 8 November 2026, visitors to this site sent 984 reports about 871 different UK numbers that had called them. Each person told us whether the call was spam, safe or whether they were not sure, and many described what happened. These figures cover every report since the site started and are updated every week.
| What people said about the call | Share of reports |
|---|---|
| Spam or unwanted | 51% |
| Not sure who it was | 46% |
| Safe or genuine | 3% |
Only about 1 in 38 unknown calls turned out to be someone the person was happy to hear from. About half were clearly unwanted, and most of the rest left people unsure, usually because the caller hung up, stayed silent or left no message.
When people chose a call type, these were the most common:
- Silent or abandoned calls: 31%. The phone rings, you answer, and nobody is there, or the line goes dead.
- Scam or fraud: 30%. Fake banks, fake HMRC, fake delivery companies and "your account has been hacked" calls.
- Automated or recorded messages: 10%.
- Sales and telemarketing: 6%.
- Genuine business or service: 2%.
About one in eight written comments (13%) mention a phone that rang once or a caller who hung up straight away. That is exactly the kind of call that tempts people to ring back.
Landlines were more often spam than mobiles
You might expect strange mobile numbers to be the main problem. In our reports, landline numbers were marked spam more often:
| Number starts with | Reports | Marked spam |
|---|---|---|
| 03 (UK-wide numbers) | 48 | 69% |
| 01 (landlines outside London) | 182 | 66% |
| 02 (London and other cities) | 93 | 52% |
| 07 (mobiles) | 656 | 46% |
Call centres and automated diallers often call from landline and 03 numbers, which businesses can rent in large batches. A familiar-looking area code, such as your own town's, is not a sign that the caller is local or genuine. Caller ID can also be faked ("spoofed"), so the number on your screen may not be the number that really called.
What time unknown calls come
69% of reports arrived between 8am and 3pm, and 2% between midnight and 8am. Thursdays and Fridays were the busiest days; Sunday had the fewest reports (6% of the week), and weekends together 18%. That matches how call centres work: they call during working hours on weekdays.
These figures describe the calls our visitors chose to report, so they lean towards unwanted calls. They are not a survey of every call in the UK, but they show what people who search an unknown number usually find. More figures: UK nuisance call statistics. Last updated 9 November 2026.
When it is fine to call back
Ringing back is reasonable when at least one of these is true:
- They left a voicemail or sent a text that makes sense: it names a company you deal with, mentions something real (an appointment, a delivery, a job application) and does not ask for money or passwords.
- You were expecting a call: your GP surgery, a hospital, a tradesperson, a school, a recruiter. These often call from withheld or switchboard numbers you will not recognise.
- You searched the number and other people describe the same genuine organisation.
Even then, if the caller claims to be your bank, HMRC, the police, the DVLA or a big company like Amazon, do not use the number they called from. Hang up, then call the organisation on a number you find yourself on its official website, a letter or the back of your bank card. For your bank you can also dial 159, a free service that connects you to most major UK banks.
Numbers you should never call back
Calling back a normal 01, 02, 03 or 07 number costs the same as any other call. Some numbers, though, can cost a lot more, and scammers know it. Do not ring back an unknown number that starts with:
| Starts with | What it is | Cost to call |
|---|---|---|
| 09 | Premium rate | Up to £3.60 a minute plus your provider's access charge |
| 070 | Personal number (looks like a mobile) | Often more than a mobile call and not in your free minutes |
| 076 | Pager | Can cost more than a normal call, usually not in your minutes |
| 087 / 084 | Business rate | Up to 13p (087) or 7p (084) a minute plus your provider's access charge |
| + and a foreign code | International number | International rates, usually not in your bundle |
The 070 trap is easy to fall for: "070 1234 5678" looks just like a mobile number at a glance. Check the first three digits. Our UK call cost checker tells you what any number costs before you dial.
One ring and gone: the missed-call trick
A call that rings once and stops is often deliberate. The caller wants you to see a missed call and ring back. In the scam known as "Wangiri" (Japanese for "one ring and drop"), the number is international or premium rate, and the longer you stay on the line, the more the scammer earns from your call.
Warning signs:
- The phone rang only once or twice, often at an odd time.
- The number starts with + and a country code you have no link to, or with 09 or 070.
- You get several missed calls from similar numbers in a row.
- If you ring back, you hear music, a recorded message or someone keeping you talking.
A genuine caller who really needs you will ring again or leave a message.
Why nobody speaks when you answer
Silent calls were the most common type in our reports. Most come from automated dialling systems used by call centres. The system rings many numbers at once and connects whoever answers to a free agent. When no agent is free, you get silence, a click or a dropped line.
Under Ofcom's rules on nuisance calls, a company whose system drops a call like this should play a short recorded message saying who called. Many do not. Some silent calls are also used to check which numbers are active, so calling back can lead to more calls.
If the same number keeps calling and nobody speaks, block it and add a report so others know what to expect.
A safe 4-step check before you ring back
- Look at the first digits. 01, 02, 03 and 07 are normal-rate. 09, 070, 076, 084, 087 or an unexpected + code: do not call back.
- Search the number. Type it into the search box on this page. You will see reports from other people, the number type, the area for landlines and the phone company that holds the number range. Our UK phone number checker does the same for one number or a whole list.
- Check for a voicemail or text. No message usually means no urgent reason to call back.
- If they claimed to be an organisation, call the organisation instead, on a number from its official website. Never give passwords, PINs or one-time codes on a call you did not start.
If you still are not sure, wait. Most genuine callers try again.
Already called back? What to do
- If you only heard silence or a recording and hung up quickly, there is usually nothing more to do. Block the number and check your next phone bill for unusual charges.
- If it was a premium or international number, check your bill or app for the call cost. If you were misled, contact your phone company; they can explain the charge and block premium numbers on your line.
- If you gave card or bank details, call your bank straight away on 159 or the number on your card, then report it to Action Fraud (or Police Scotland on 101).
- If you shared a password or code, change that password now and turn on two-step login where you can.
Read our scam alerts to see how the most common UK phone scams work, such as the bank impersonation scam and the HMRC tax scam.
How to get fewer unknown calls
- Block the number on your phone. Our guide on how to block calls shows the steps for iPhone, Android and landlines.
- Register with the Telephone Preference Service. It is free and stops most legal sales calls within 28 days. Scammers ignore it.
- Turn on spam filtering: "Silence Unknown Callers" on iPhone, "Filter spam calls" on Android, or your landline provider's call protection.
- Forward scam texts to 7726, free on all UK networks.
- Report the number here. Every report helps the next person who searches it decide whether to answer.
