It said it had received requests in 29 countries.
Vodafone linked to data released by national governments, covering either 2013 or the most recent year available. It noted that each country, agency and operator counts requests in different ways and therefore it was difficult to compare them.
According to the most recent national reports, which were collated by the Guardian newspaper, Australia made 685,757 requests for details about calls, such as where they were made and to whom. It intercepted 3,389 calls.
Britain had similar statistics, with 514,608 requests for details and 2,760 interceptions. Germany made 18,026 requests, with 23,687 interceptions in 2012, the last time data was given.
Vodafone is the world’s second largest mobile operator in terms of customer numbers, behind China Mobile (0941.HK).
(Editing by Sophie Walker)
Article Appeared @http://www.reuters.com/article/2014/06/06/us-vodafone-group-disclosure-idUSKBN0EH0UK20140606