If you dial the Vault-Tec Phone Number in real life it will answer
The 1-888-4-VAULT-TEC number may look a bit longer than most, but it does work, asPolygon discovered.
This number was available in Fallout 3, and you see it in Fallout 4 on a Vault-Tec poster in the house at the beginning of the game. Here’s what happens when you call it.
The 1-888-4-VAULT-TEC number is a bit longer than the most but it does work as Polygon discovered this.
You can see this number on a Vault-Tec poster in a house when you start the game this number was also available on Fallout 3
Here the Soundcloud link you should listen if you want to know how it sounds like.