Telephone number
From Tardis Wiki, the free Doctor Who reference
A telephone number was a number assigned to a telephone that was used to contact that phone.
In the United Kingdom, 999 was the telephone number to contact the police in an emergency, while 101 was the number used to contact local police. (TV: For Tonight We Might Die) 112 was the "European one". According to Clyde Langer, it was supposed to work even if everything else went down. (TV: The Empty Planet)
95475949 was the TARDIS telephone number recorded in Clara Oswald's mobile phone under the entry "Doctor". Chandra Scindia used this number to contact the Twelfth Doctor in from 2315 Mumbai. (COMIC: The Swords of Kali)
