- For the terrorist attack, see 9/11.
9-1-1 was a telephone number in the United States used to quickly request police assistance or emergency medical services.
After Kim Bauer called her mother to tell her she and Janet York had been kidnapped at Platt's Auto Body, Teri called 9-1-1 and told the dispatcher where the girls were. When Teri and Kevin Carroll were pulled over by a motorcycle cop for speeding, they asked him to call the nearby station and verify the 9-1-1 call they had made, which he eventually did. ("Day 1: 1:00am-2:00am", "2:00am-3:00am")
Amy Martin called 9-1-1 from the motel where she and her mother Evelyn were staying, after Evelyn passed out. The call allowed Christopher Henderson, who was monitoring police band frequencies, to track them down. ("Day 5: 11:00pm-12:00am")
Jillian Wallace called 9-1-1, against her husband Ray's insistence, to report that Ahmed Amar was holding their son hostage. The police eventually reported the situation to CTU Los Angeles. ("Day 6: 9:00am-10:00am")
The Red Square assassin sent to kill Victor Aruz called 9-1-1 to report Aruz's car as stolen. Not long after, a civilian bystander spotted what looked like Aruz getting mugged by Jack Bauer and called 9-1-1, allowing the assassin and his partner to locate Aruz. ("Day 8: 4:00pm-5:00pm")