0800 678 3110 (telephone number)
0800 678 3110 was the telephone number to the TARDIS telephone at some point during the Doctor's thirteenth incarnation.
She used it during a 21st century invasion of Earth from creatures from all over the universe, when she told the BBC to urge human civilisation to leave her a message if they discovered any alien activity. (PROSE: Have You Seen The Aliens Terms and Conditions [+]Loading...["Have You Seen The Aliens Terms and Conditions (feature)"]) She further left her phone number on blueprints that also showed Weeping Angels and Sontaran Battle Fleets, which were shown all around electronic billboards in the Liverpool areas. (WC: Incoming Message [+]Loading...["Incoming Message (2021 webcast)"])
The Doctor left a voice message for whoever called her phone number: (AUDIO: Thirteenth Doctor's voicemail [+]Loading...{"noital":"1","1":"Thirteenth Doctor's voicemail (audio story)"})
You've reached the voicemail of *BEEP* the Doctor. If you're ringing this, it means enemies from across the universe have arrived on Earth and the battle is coming imminently! Who did you see, and where? I need as much information as possible! Protect yourself. It's coming. Be ready.