System for providing location based services, for emergency calls, for voice calls originating from a data network, which is a wireless local area network (WLAN), wherein the system comprises: a voice call handling unit, configured to receive, process and/or forward voice calls originating from the data network; and a database, which is configured to associate unique data network identifiers of data networks with location information corresponding to these data networks, wherein the location information stored in the database comprises a Public Safety Answering Point, PSAP, or a service provider identifier; wherein the voice call handling unit is further configured to extract a unique data network identifier from an incoming voice call from the data network, the unique data network identifier comprising a last accessed WLAN Basic Set Identification (BSSID) of a device providing the data network, send a request comprising the unique data network identifier to the database for querying a location information associated with the unique data network identifier, and forward the voice call in consideration of the location information requested from the database to the PSAP or the service provider which is responsible for the geographical location of the data network from which the voice call originates, wherein the voice call handling unit is included in an IP Multimedia Subsystem, IMS, according to the 3 rd Generation Partnership Project, 3GPP, of the system. a voice call handling unit, configured to receive, process and/or forward voice calls originating from the data network; and a database, which is configured to associate unique data network identifiers of data networks with location information corresponding to these data networks, wherein the location information stored in the database comprises a Public Safety Answering Point, PSAP, or a service provider identifier; wherein the voice call handling unit is further configured to extract a unique data network identifier from an incoming voice call from the data network, the unique data network identifier comprising a last accessed WLAN Basic Set Identification (BSSID) of a device providing the data network, send a request comprising the unique data network identifier to the database for querying a location information associated with the unique data network identifier, and forward the voice call in consideration of the location information requested from the database to the PSAP or the service provider which is responsible for the geographical location of the data network from which the voice call originates, extract a unique data network identifier from an incoming voice call from the data network, the unique data network identifier comprising a last accessed WLAN Basic Set Identification (BSSID) of a device providing the data network, send a request comprising the unique data network identifier to the database for querying a location information associated with the unique data network identifier, and forward the voice call in consideration of the location information requested from the database to the PSAP or the service provider which is responsible for the geographical location of the data network from which the voice call originates, wherein the voice call handling unit is included in an IP Multimedia Subsystem, IMS, according to the 3 rd Generation Partnership Project, 3GPP, of the system.