<P> Individual mobile phone companies are allocated different ranges within the 073xx, 074xx, 075xx, 07624, 077xx, 078xx and 079xx area codes . Changes to mobile phone numbers in the Big Number Change were mostly straight replacements, such as Vodafone customers on the 0378 block became 07778 . </P> <Table> <Tr> <Th> 073xx xxxxxx </Th> <Td> Mobile phones (in use since November 2014) </Td> </Tr> <Tr> <Th> 074xx xxxxxx </Th> <Td> Mobile phones (in use since November 2009) </Td> </Tr> <Tr> <Th> 075xx xxxxxx </Th> <Td> Mobile phones (in use since May 2007) </Td> </Tr> <Tr> <Th> 07624 xxxxxx </Th> <Td> Mobile phones on the Isle of Man </Td> </Tr> <Tr> <Th> 077xx xxxxxx </Th> <Td> Mobile phones (former 03xx and 04xx--mostly Vodafone and O2 (formerly Cellnet)) </Td> </Tr> <Tr> <Th> 078xx xxxxxx </Th> <Td> Mobile phones (former 05xx, 06xx and 08xx--mostly Vodafone and O2 (formerly Cellnet)) </Td> </Tr> <Tr> <Th> 079xx xxxxxx </Th> <Td> Mobile phones (former 09xx--mostly Orange and T - Mobile (formerly one2one)) </Td> </Tr> <Tr> <Th> 07911 2xxxxx 07911 8xxxxx </Th> <Td> WiFi numbers (e.g. 3G / LTE - enabled tablet computers) </Td> </Tr> </Table> <Tr> <Th> 073xx xxxxxx </Th> <Td> Mobile phones (in use since November 2014) </Td> </Tr> <Tr> <Th> 074xx xxxxxx </Th> <Td> Mobile phones (in use since November 2009) </Td> </Tr>

How many digits does a uk phone number have