1.

Member States shall ensure that the following categories of data are retained under this Directive: data necessary to trace and identify the source of a communication: concerning fixed network telephony and mobile telephony: the calling telephone number; the name and address of the subscriber or registered user; concerning Internet access, Internet e-mail and Internet telephony: the user ID(s) allocated; the user ID and telephone number allocated to any communication entering the public telephone network; the name and address of the subscriber or registered user to whom an Internet Protocol (IP) address, user ID or telephone number was allocated at the time of the communication; data necessary to identify the destination of a communication: concerning fixed network telephony and mobile telephony: the number(s) dialled (the telephone number(s) called), and, in cases involving supplementary services such as call forwarding or call transfer, the number or numbers to which the call is routed; the name(s) and address(es) of the subscriber(s) or registered user(s); concerning Internet e-mail and Internet telephony: the user ID or telephone number of the intended recipient(s) of an Internet telephony call; the name(s) and address(es) of the subscriber(s) or registered user(s) and user ID of the intended recipient of the communication; data necessary to identify the date, time and duration of a communication: concerning fixed network telephony and mobile telephony, the date and time of the start and end of the communication; concerning Internet access, Internet e-mail and Internet telephony: the date and time of the log-in and log-off of the Internet access service, based on a certain time zone, together with the IP address, whether dynamic or static, allocated by the Internet access service provider to a communication, and the user ID of the subscriber or registered user; the date and time of the log-in and log-off of the Internet e-mail service or Internet telephony service, based on a certain time zone; data necessary to identify the type of communication: concerning fixed network telephony and mobile telephony: the telephone service used; concerning Internet e-mail and Internet telephony: the Internet service used; data necessary to identify users' communication equipment or what purports to be their equipment: concerning fixed network telephony, the calling and called telephone numbers; concerning mobile telephony: the calling and called telephone numbers; the International Mobile Subscriber Identity (IMSI) of the calling party; the International Mobile Equipment Identity (IMEI) of the calling party; the IMSI of the called party; the IMEI of the called party; in the case of pre-paid anonymous services, the date and time of the initial activation of the service and the location label (Cell ID) from which the service was activated; concerning Internet access, Internet e-mail and Internet telephony: the calling telephone number for dial-up access; the digital subscriber line (DSL) or other end point of the originator of the communication; data necessary to identify the location of mobile communication equipment: the location label (Cell ID) at the start of the communication; data identifying the geographic location of cells by reference to their location labels (Cell ID) during the period for which communications data are retained.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-14 · Text as adopted (Official Journal); later amendments are not incorporated in this text.