(a) A telephone or telegraph corporation shall not make available to any other person or corporation, without first obtaining the residential subscriber’s consent, in writing, any of the following information:

1. (1) The subscriber’s personal calling patterns, including any listing of the telephone or other access numbers called by the subscriber, but excluding the identification to the person called of the person calling and the telephone number from which the call was placed, subject to the restrictions in Section 2893, and also excluding billing information concerning the person calling that federal law or regulation requires a telephone corporation to provide to the person called.
2. (2) The residential subscriber’s credit or other personal financial information, except when the corporation is ordered by the commission to provide this information to any electrical, gas, heat, telephone, telegraph, or water corporation, or centralized credit check system, for the purpose of determining the creditworthiness of new utility subscribers.
3. (3) The services that the residential subscriber purchases from the corporation or from independent suppliers of information services who use the corporation’s telephone or telegraph line to provide service to the residential subscriber.
4. (4) Demographic information about individual residential subscribers, or aggregate information from which individual identities and characteristics have not been removed.

(d) This section does not apply to any of the following:

1. (1) Information provided by residential subscribers for inclusion in the corporation’s directory of subscribers.
2. (2) Information customarily provided by the corporation through directory assistance services.
3. (3) Postal ZIP Code information.
4. (4) Information provided under supervision of the commission to a collection agency by the telephone corporation exclusively for the collection of unpaid debts.
5. (5) Information provided to an emergency service agency responding to a 911 telephone call or any other call communicating an imminent threat to life or property.
6. (6) Information provided to a law enforcement agency in response to lawful process.
7. (7) Information that is required by the commission pursuant to its jurisdiction and control over telephone and telegraph corporations.
8. (8) Information transmitted between telephone or telegraph corporations pursuant to the furnishing of telephone service between or within service areas.
9. (9) Information required to be provided by the corporation pursuant to rules and orders of the commission or the Federal Communications Commission regarding the provision over telephone lines by parties other than the telephone and telegraph corporations of telephone or information services.
10. (10) The name and address of the lifeline customers of a telephone corporation provided by that telephone corporation to a public utility for the sole purpose of low-income ratepayer assistance outreach efforts. The telephone corporation receiving the information request pursuant to this paragraph may charge the requesting utility for the cost of the search and release of the requested information.
11. (11) Information provided in response to a request pursuant to subdivision (a) of Section 530.8 of the Penal Code.

(f) For purposes of this section, both of the following definitions apply:

1. (1) “Access number” means a telex, teletex, facsimile, computer modem, or any other code that is used by a residential subscriber of a telephone or telegraph corporation to direct a communication to another subscriber of the same or another telephone or telegraph corporation.
2. (2) “Lawful process” means an action taken pursuant to a court-ordered subpoena or judicial warrant.