This was originally posted by the ACLU of Northern California.

In the wake of our shareholder advocacy , AT&T has now joined Verizon and released its first transparency report . AT&T's report shows how federal, state, and local governments have requested large volumes of customer information, typically without a warrant. While we welcome AT&T's move, the American public remains in the dark about a lot of what's happening behind the scenes. Greater transparency is still needed from AT&T and the federal government.

Here's a breakdown of the many demands AT&T received in 2013. As we have long suspected, the vast majority of these demands lacked a warrant:

AT&T received 301,816 demands related to criminal and civil litigation. Only 16,685 of these demands included a warrant based on probable cause.

AT&T received 223,659 subpoenas for customer information. This is significantly more than the 164,184 subpoenas Verizon received during the same period .

. AT&T received 37,839 demands for location information. At least 21,000 of these demands lacked a warrant. AT&T's full report says a warrant is "almost always required to obtain real-time location information."

a warrant is "almost always required to obtain real-time location information." AT&T also received 1,034 demands for "cell tower searches" last year, some of them compelling the company to identify the numbers of all phones that connected to a specific cell tower during a given period of time. Cell tower information is ripe for misuse—we know of at least one instance where a cell tower request was made for all phones within the vicinity of a planned labor protest .

AT&T also included information on national security requests (though, not the complete story):

In addition to a clearer explanation of national security requests, we hope that AT&T's future reports will also address the following shortcomings:

The current report does not include the number of customers or individuals affected by all of the government demands. The company claims that it is "difficult" to tally this information.

that it is "difficult" to tally this information. The report does not describe statistics on how often AT&T complies with demands.

This report includes very limited information about demands from foreign governments.