def fetch(self, origination_number=values.unset):
params = values.of({'<STR_LIT>': origination_number, })<EOL>payload = self._version.fetch(<EOL>'<STR_LIT:GET>',<EOL>self._uri,<EOL>params=params,<EOL>)<EOL>return NumberInstance(<EOL>self._version,<EOL>payload,<EOL>destination_number=self._solution['<STR_LIT>'],<EOL>)<EOL>
Fetch a NumberInstance

:param unicode origination_number: The origination number for which to fetch pricing information

:returns: Fetched NumberInstance
:rtype: twilio.rest.pricing.v2.voice.number.NumberInstance