WordNet (r) 3.0 (2006):

keypad
    n 1: a keyboard that is a data input device for computers;
         arrangement of keys is modelled after the typewriter
         keyboard [syn: computer keyboard, keypad]

The Free On-line Dictionary of Computing (30 December 2018):

keypad
number keys

    An input device with a small array of push
   buttons labeled with numbers or other symbols, designed to
   allow rapid entry of characters from a small set, e.g. decimal
   digits 0-9 or, historically, hexadecimal digits.

   The most common form of keypad is the numeric keypad found
   on a standard PC keyboard.

   (2008-10-10)