Indian mobile number: an optional +91, then ten digits starting 6, 7, 8 or 9, the range the regulator allocates to mobiles. Ten bare digits also match, so it competes with the NHS number and the US provider identifier.
Label: IN_PHONE
(?<![\w+])(?:\+91[\s.-]?)?[6-9]\d{4}[\s.-]?\d{5}(?!\w)Call +91 98765 43210 after lunch. → +91 98765 43210Mobile 9876543210 on the form. → 9876543210Call 5876543210Call 98765 4321Tags: in, contact