A method for mobile advertising conversion attribution can include receiving, for example, at a conversion tracking server, a signal from a user device indicating that a conversion tag has been received. The signal can include a segment identifier, and a user agent (UA) and/or an internet protocol (IP) address of the user device. A conversion identifier can be defined that is associated with the segment identifier, the UA, and/or the IP address. The conversion identifier can be stored in a first database along with an indication of when the conversion identifier was received. A second database can be searched for an advertisement identifier that matches the conversion identifier and was received within a predetermined period of time before the conversion identifier. If a match between the conversion identifier and an advertisement identifier is located, a signal indicating that an advertisement was converted can be sent to an advertiser.