m/
 (
  numer           
  (               
   i              
   (tel|utili|verdi|facsimili|fax)
  |o              
   (verde|tel|facsimile|fax|tel)
  )
 |t:              
 |f:       
 |fax
 |al\snumero       
 |phone
 |p.i.
 )                 
  [^\d]{,7}        
                  
  (\d\s*){3,15}   
  ([^\d]|$)       
 /gx