INPUT FIELD FOR TELEPHONE NUMBER

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
</head>
<body>
    <h2>Input field for telephone numbers</h2>
	<label for="phone">Enter phone number</label>
	<input type="tel" id="phone" name="phone" pattern="[6-9]-[0-9][0-9]-[0-9][0-9][0-9][0-9]-[0-9][0-9][0-9]">
    <input type="submit">	
</body>
</html>