Public Health Wales
This number is listed by Public Health Wales on its own website as a number it may call you from (Bowel Screening Wales calls about your bowel screening test result).
Source: “I have had a missed call from 02921 673329, who called me?” (opens in a new tab). Checked 14 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Public Health Wales back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.