🔄 Balance Your Call Volume
Making a high number of calls from a single line is a common spam trigger. Here’s how to stay under the radar:
Distribute calls across multiple numbers: if you’re dialling at scale, spread the volume across 2–3 phone lines to reduce frequency per number.
Avoid repeat calls on the same day: calling the same recipient multiple times in a short window can seem aggressive or robotic.
🗣️ Make Your Calls Count
Calls that end in a hang-up or last just a few seconds aren’t just ineffective—they look suspicious to spam filters.
Leave a voicemail: briefly explain who you are, why you called, and how they can reach you back.
Avoid “hang-up” calls: these calls offer no value and can harm your call reputation over time.
Call at the right time: consider the recipient’s schedule. Morning or afternoon on a weekday usually performs better than early morning or late evening.
🔁 Improve Engagement Rates
More answered calls and call-backs = healthier phone number reputation.
Minimize unanswered calls: refine your contact lists to improve connection rates.
Increase call-backs: leave a friendly, clear voicemail that encourages a return call.
Use a professional voicemail greeting: when someone calls you back, ensure they know who they’ve reached and why.
✅ Respect Do Not Call Lists
Calling people who have explicitly opted out of telemarketing is not just bad form—it can also land you in legal trouble.
Avoid numbers on the Telephone Preference Service (TPS) registry: https://www.tpsonline.org.uk/
Focus on qualified leads: call people who’ve opted in to receive communication from your business.
🧾 Register Your Numbers with Trusted Services
Carriers rely on third-party databases to label numbers. To ensure your identity is clear and reduce the chance of being flagged, register your phone lines with the following services:
Free Caller Registry – Works across multiple carriers
First Orion – Used by T-Mobile
TNS – Covers Sprint & US Cellular
Hiya – Powers spam detection for AT&T (https://en-gb.hiya.com/)
Verizon – Offers its own registration and verification tools
These services help associate your business with your number and reduce the likelihood of a “Spam Likely” label appearing on recipient phones.
🛡️ Helpful Resources
UK: Ofcom – Unwanted Calls and Messages (https://www.ofcom.org.uk/phones-telecoms-and-internet/advice-for-consumers/scams/unwanted-calls)
EU: European Commission – Privacy & Spam Regulations (https://ec.europa.eu/info/law/law-topic/data-protection_en)
USA: FCC – Stop Unwanted Robocalls & Texts (https://www.fcc.gov/consumers/guides/stop-unwanted-robocalls-and-texts)
Final Thoughts
Maintaining a clean calling reputation requires more than just good intentions—it demands thoughtful practices. Use proper caller ID, monitor feedback, avoid high-frequency dialling, and ensure your calls offer real value. By staying proactive, you can keep your number off the spam radar and your calls where they belong: answered.
By staying compliant, maintaining professional practices, and leveraging the right tools, you can ensure your calls reach your audience—and stay far away from the spam folder.
