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Are cloud call or VoIP numbers more likely to be ignored or marked as spam?

Yes — VoIP and cloud call numbers are more likely to be ignored or flagged as spam for several reasons:

• They are frequently used for automated or high-volume calling
• Many cloud numbers are shared across multiple companies, so they accumulate spam reports
• Carriers and caller-ID apps apply stricter filtering to internet-routed calls
• They often appear as "Business" or "Unknown" rather than a personal mobile number

To reduce spam labelling:
• Use SIM/GSM mobile numbers for outbound sales where possible
• Avoid call bursts — space calls naturally
• Prioritise known or pre-engaged contacts
• Leave clear, contextual voicemails rather than hanging up
• Monitor how your number appears to recipients