Geographic numbers are allocated in blocks to different telecommunications providers. However, a telephone number from a block allocated to a certain provider may not be serviced by that provider anymore due to number portability; subscribers who switch providers can take their number with them.The emergency number in the Netherlands is 112. GSM mobile phones may accept a different number to dial into the emergency services (such as 999, 000 or 911), depending on their firmware. Directory assistance is available from several commercial providers, on 18xy (e.g. 1888 from KPN).