What's going on
Silent calls are one of the biggest gripes people have about their phone. You answer, hear nothing, and after a few seconds the line goes dead. Sometimes there's faint background noise, a click, or a brief pause before the call drops. It's unsettling, and when it happens more than once it becomes seriously annoying.
According to Ofcom research, silent calls made up around 34% of all nuisance calls reported by UK consumers. People who got unwanted calls were receiving roughly two per week on average, and four out of five people surveyed had at least one nuisance call during a four week period (Ofcom). Ofcom receives well over 100,000 complaints a year about unwanted calls, and silent calls sit right near the top of that list.
Why your phone rings and nobody speaks
There are a few different reasons you might answer the phone to silence. Some are harmless. Others are not.
1. Automatic Dialling Systems (the most common cause)
Call centres and marketing firms use machines called predictive diallers. These systems ring dozens of numbers at once, gambling that not everyone will pick up. When more people answer than there are staff available to talk to them, the extra calls get dropped. You hear nothing because there's nobody on the other end. The machine connected your call, but there was no agent free to speak to you.
Why it keeps happening
Some companies push their diallers too hard to squeeze out more sales calls per hour. The more aggressively they dial, the more calls get abandoned. Ofcom's rules say this should happen less than 3% of the time for any given campaign over 24 hours (Ofcom, Persistent Misuse Statement). In practice, not every firm sticks to that.
2. Scam reconnaissance
Criminals sometimes ring numbers just to check whether they're active. If you pick up, they know a real person is on the other end. Your number goes on a list and gets sold to other scammers, or they come back later with a proper con. This is why you might start getting more scam calls after answering a silent one.
What to watch for
- • A silent call followed by scam calls in the days after
- • The number shows as international or withheld
- • You start getting calls from different numbers with similar patterns
- • The calls come at odd hours
3. Faults and technical glitches
Not every silent call has a sinister explanation. Sometimes the caller's phone cuts out, the network drops the audio, or someone accidentally dials your number from their pocket. If it only happens once and you never hear from the number again, it's almost certainly nothing to worry about.
4. Debt collection and tracing calls
Debt collection agencies and tracing firms use automated diallers too. If an agent doesn't pick up their end in time, the call drops silently. These tend to come repeatedly and often from the same number or cluster of numbers. They may also leave no voicemail, which only adds to the frustration.
Silent calls vs abandoned calls: what's the difference?
People use these terms interchangeably, but Ofcom treats them differently. Understanding the distinction matters because the rules for each are different.
Silent Call
You answer and hear nothing at all. No recorded message, no breathing, no background noise. After a few seconds, the line disconnects. This is what happens when a dialler connects to you but there's no agent or recording to take over the call.
Ofcom's position: Companies must not make silent calls. If a call is connected and abandoned, the recipient must hear an information message identifying the company and giving a freephone number to opt out (Ofcom, Persistent Misuse Statement).
Abandoned Call
You answer and the call drops before you speak to anyone, but you may hear a brief recorded message or a short pause first. This happens when a dialling system connected your call, recognised nobody was available, and played a required message before hanging up.
Ofcom's position: The abandoned call rate must not go above 3% of live calls per 24 hours for each campaign. The company must ring for at least 15 seconds before abandoning (Ofcom, Persistent Misuse Statement).
What to do when you get a silent call
Don't say anything
If you answer and hear silence, don't confirm your name, say "hello" repeatedly, or press any buttons. Any response tells the system (or the scammer) that your number is active and a real person answers. Just wait a moment and hang up.
Note the number
Write down the number, the date, and the time. If the calls keep coming, this log is what you'll need when reporting to Ofcom or the ICO. Check the number on CallerCheck to see if others have reported it.
Block the number
If the same number keeps calling, block it on your phone. Both iPhone and Android let you block numbers from your recent calls list. On a landline, check with your provider about call blocking services. BT, Sky, and TalkTalk all offer them.
Our full call blocking guideReport to Ofcom
If the calls keep coming, report the number to Ofcom. They deal with silent and abandoned calls specifically. Your report feeds into enforcement cases against companies that break the rules.
Register with TPS
If you haven't already, sign up to the Telephone Preference Service. It won't stop scammers or overseas callers, but it should cut out calls from legitimate UK companies. It's free and takes about 28 days to kick in.
Register with TPSWhen a silent call is something more sinister
Most silent calls are annoying but harmless. A dialling machine messed up and nobody was there to talk to you. But sometimes a silent call is the first step in something worse. Here's how to tell the difference.
Probably just a dialler
- • Happens once or twice, then stops
- • The number is a UK landline or freephone
- • Calls come during business hours (9am to 6pm)
- • You hear a brief recorded message before it hangs up
- • The number traces back to a known company on CallerCheck
Could be a scam setup
- • Calls increase after you answered the first one
- • Number is international or withheld
- • Calls come at unusual times (evenings, weekends, early morning)
- • You start getting scam calls from different numbers shortly after
- • Multiple silent calls from different numbers in the same week
The rules companies must follow
Ofcom sets the rules for companies using automatic dialling equipment. These come from Ofcom's Statement of Policy on the persistent misuse of an electronic communications network or service, updated January 2026. If a company breaks them, Ofcom can investigate and issue fines.
Abandoned calls must stay below 3%
For every campaign, the abandoned call rate must not exceed 3% of live calls made in any 24 hour period. The target should be 0%. Anything above 3% is a breach.
Calls must ring for at least 15 seconds
A dialler must let the phone ring for a minimum of 15 seconds before hanging up. This stops systems from flooding numbers with quick ring and drop calls.
Abandoned calls must play a message
If a call is connected and then abandoned (no agent available), the recipient must hear a recorded message. The message must identify the company, explain that no one is available, and provide a freephone number to call back or opt out.
No repeat calls within 72 hours
If a call is abandoned to a particular number, the dialler must not call that number again within 72 hours. This prevents the same person from being hammered by silent calls day after day.
Records must be kept
Companies must keep records showing their abandoned call rates and compliance with these rules. If Ofcom investigates, the company needs to produce this evidence.
Source: These rules come from Ofcom's Statement of Policy on persistent misuse, which covers sections 128 to 130 of the Communications Act 2003. Ofcom published an updated statement on 22 January 2026. Companies found in breach can be fined up to £2 million.
Companies that have been fined
Ofcom has issued penalties against several companies for making too many silent and abandoned calls. Some of the firms that have been fined include:
HomeServe plc
Fined for persistent misuse through silent and abandoned calls to consumers
RWE npower PLC
Penalised under section 130 of the Communications Act for abandoned call breaches
TalkTalk Telecom
Fined for making large numbers of abandoned and silent calls to UK consumers
Source: Ofcom enforcement programme into silent and abandoned calls
Where to report and who handles what
Different types of nuisance calls go to different organisations. Getting this right means your complaint reaches the people who can actually do something about it.
Ofcom
Report silent calls, abandoned calls, and repeated nuisance calls from automatic dialling systems. Ofcom has enforcement powers and can fine companies up to £2 million.
Report to OfcomICO
Report live sales and marketing calls where a real person speaks to you, especially if you're on the TPS register. The ICO can fine companies up to £500,000 for breaching privacy regulations.
Report to the ICOAction Fraud
Report to Action Fraud if you believe the silent calls are part of a scam or if you've lost money as a result of calls from the same number.
Report to Action Fraud7726 (Spam Texts)
If the silent call came through as a text followed by a silent call back, forward the text to 7726. This alerts your mobile network so they can investigate the number.
Free from all UK mobile networks
Frequently Asked Questions
Are silent calls illegal?
Why do I get silent calls at the same time every day?
Should I call back a number that gave me a silent call?
Can silent calls be used to check if someone is home?
Do silent calls affect elderly or vulnerable people differently?
Quick Summary
When You Get a Silent Call
- • Don't say anything or press any buttons
- • Hang up after a couple of seconds
- • Note the number, date, and time
- • Look up the number on CallerCheck
- • Block it if it calls again
Where to Report
- • Silent and abandoned calls: Ofcom
- • Marketing calls (live person): ICO
- • Scam calls: Action Fraud
- • Spam texts: forward to 7726
- • Feeling threatened: call 101