July 22 (Reuters) - A nationwide AT&T ( T ) wireless

outage in February that lasted for more than 12 hours blocked

more than 92 million voice calls and prevented more than 25,000

attempts to reach 911, the U.S. Federal Communications

Commission said in a report seen by Reuters.

The FCC, which has been investigating the issue for five

months, said it had referred the matter to its Enforcement

Bureau for potential violations of FCC rules. The FCC said all

voice and 5G data services for AT&T ( T ) wireless customers were

unavailable during the outage. AT&T ( T ) did not immediately comment.