It is configurable what types of things should get linked:

URLs with protocol (e.g. https://example.com/abc)

URLs without protocol (e.g. example.com, linked as https://example.com)

Email addresses (e.g. hello@example.com, linked as mailto:hello@example.com)

Phone numbers in international format (e.g. +44 20 7123 4567, linked as tel:+442071234567)

Phone numbers in country-specific local format (e.g. 020 7123 4567, linked as tel:+442071234567 according to configuration described below)

The configuration for country-specific local format of phone numbers is a bit complicated. You can specify only one format (because they may conflict). There are a few predefined formats but you can also specify your own.

Custom formats:

General format is detection regex;prefix;trimming regex.

The detection regex is used to detect the phone number in the text. Non-digits are automatically removed, then the trimming regex (optional) is applied by removing anything it matches (e.g. to remove leading zero) and the prefix is added (should be the international prefix such as +44).

Predefined formats:

US (= \b1?\d{10}\b|\b\(\d{3}\) \d{3}-\d{4}\b|\b(?:1-)?\d{3}-\d{3}-\d{4}\b;+1;^1)

AT (= \b0\d[\d \-/]{6,}\d\b;+43;^0)

DE (= \b0\d[\d \-/]{6,}\d\b;+49;^0)

CH (= \b0\d[\d \-/]{6,}\d\b;+41;^0)

UK (= \b0\d[\d \-/]{7,}\d\b;+44;^0)

IT (= \b[03]\d[\d \-/]{7,}\d\b;+39)

FR (= \b0\d ?(?:\d\d ?){4};+33;^0)

IL (= \b0\d[\d \-]{7,}\d\b;+972;^0)