The RegEx I provided above will include any country codes or other digits prior to the 10 digit phone number. If you want the last 10 digits, then this should work:
Example Output
MACRO: Extract 10-digit Phone Number
**Requires: KM 8.2.4+ macOS 10.11 (El Capitan)+**
(Macro was written & tested using KM 9.0+ on macOS 10.14.5 (Mojave))
#### DOWNLOAD Macro File:
<a class="attachment" href="/uploads/default/original/3X/9/6/9613b2afdb6aa7713b3c694757e9b9242f4c8a02.kmmacros">Extract 10-digit Phone Number.kmmacros</a>
**Note: This Macro was uploaded in a DISABLED state. You must enable before it can be triggered.**
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<img src="/uploads/default/original/3X/1/2/12c69d7cbef45f5653f1085398ca119937c934cc.png" width="513" height="1100">