<Tr> <Th> Trunk prefix </Th> <Td> none </Td> </Tr> <P> The Spanish telephone numbering plan is the allocation of telephone numbers in Spain . It is regulated by Comisión del Mercado de las Telecomunicaciones (CMT). </P> <P> Spain changed to a closed telephone numbering plan in 1998 . Previously, the trunk prefix was' 9', but this was incorporated into the subscriber's number, so that a nine - digit number was used for all calls, e.g.: </P> <P> Mobiles similarly changed: they are now prefixed with the digit' 6' or' 7': </P>

How many numbers in a spanish phone number