It is one of the most uncomfortable moments in outbound calling. You have said your name, you are halfway through your opening, and the other person cuts in: "Who gave you my number?" The tone might be curious, suspicious or openly annoyed. What you say in the next ten seconds shapes the rest of the call, and sometimes your reputation.
This article is about answering honestly and calmly. It is general practical guidance on call technique, not legal advice. Rules on contacting people differ by country and by type of contact, so check what applies to you with your own compliance contact or a qualified adviser.
Why people ask
The question is rarely a request for a source. It usually means one of three things:
- Genuine curiosity. They would like to know how you found them, and will carry on if the answer makes sense.
- Worry about their data. They are concerned about where their number has been shared.
- A polite way to end the call. It signals irritation and tests whether you will back off.
Your reply should work for all three: truthful, short, and respectful of their right to say stop.
The golden rule: only say what is true
Never invent a source. If you say "a colleague of yours mentioned you" and that is not so, you risk the call turning into a complaint and your company's name being used against you. A true answer that sounds slightly dull is better than a clever one that is false.
Before you ever dial, make sure you can answer these two questions about every list you use:
- Where did this contact come from (a business directory, a company website, a form the person filled in, an event, a referral)?
- What was the person told about being contacted?
If you do not know, ask your manager before you call, not during the call.
Reply patterns for different situations
The number is from a public business source. "I found the company's number in [source, for example the public business directory], and I'm calling because you look after [area]. I'll be brief. Would you like me to explain why, or would you rather I didn't?"
The person gave their details to you or your company. "You left your details on our website on [date] when you asked about [topic], so I'm following up. If that isn't useful any more, I can make a note not to call again."
It came from a referral. "[Name] at [company] suggested I speak to you. I haven't told them anything about your business, I just have your name and role." Only use this if the referral is real and the referrer is happy to be named.
You do not know the source. "I'm not sure where that particular record came from, and I don't want to guess. Let me find out. May I take a note of your preference, and I'll follow up in writing with the answer?" Then do it. Admitting you do not know is better than bluffing.
The person is angry. Skip the explanation. "I understand, and I'm sorry to have bothered you. I'll make sure you're not called again. Is there anything you'd like me to note?" Then end the call politely. For a fuller approach to hostile callers, see practising objection handling.
What not to say
- "I can't tell you." It sounds evasive and invites more suspicion.
- "It's all public information." Even if partly true, it sounds dismissive and does not answer the question.
- A long defence of your company. Keep it to two sentences. The longer you talk, the more it sounds like a script.
- "Do you have two minutes?" straight after a challenge. Answer first, then ask.
- Guessing. A wrong guess can be worse than silence.
Respecting a request to stop
If the person says they do not want to be called again, say that you will note it, and make sure that you actually do. Record the request in your system or tell the right person the same day. Different countries have different formal rules about do-not-call lists and objections, and your organisation should have a clear process. Following the process is part of the response, not an afterthought.
Keeping your tone steady
The words matter less than the delivery. Three habits help:
- Slow down. A challenge makes most people speed up, which sounds nervous.
- Pause before replying. A one-second pause reads as calm.
- Lower the energy, not the courtesy. Match their seriousness instead of pushing cheerfulness.
How to practise this moment
Because the question is unpredictable, it is a good fit for rehearsal. A useful drill:
- Write one honest reply for each source you actually use (website form, directory, referral, event).
- Say each aloud three times, with the tone of a curious person, a worried person and an annoyed person.
- Ask a colleague, or an AI customer, to interrupt your opening with the question at random.
- Review what you said. Did you answer first? Did you offer to stop? Was it short?
In DIRI AI you can set up a first call where the AI customer plays a suspicious contact and challenges you early on. You speak by voice, then read a report on the call and try the same moment again. The Free plan includes 3 voice calls a month of up to five minutes each, with no card needed, which is enough to run this one drill a few times. See the pricing page to start, or read the sample dialogues first.
Related: How to get past the gatekeeper on a cold call (with scripts), The 30-second phone pitch, Cold Call Voicemail Scripts: What to Say in 20 Seconds. Free tool: Cold Call Openers.
FAQ
Should I always tell a prospect where I got their number?
You should answer truthfully and briefly. If you do not know the source, say so and offer to find out rather than guessing.
What if the prospect says "take me off your list"?
Acknowledge it, apologise briefly, end the call politely and record the request through your organisation's process the same day.
Is "Who gave you my number?" always a bad sign?
Not always. Sometimes it is simple curiosity. A calm, honest answer often keeps the conversation going, and if not, you end the call respectfully.
Is this article legal advice?
No. It covers call technique only. Rules differ by country and contact type, so check with your compliance contact or a qualified adviser.