🇬🇧How to call the United Kingdom from the US

Dial 011, then 44, then the United Kingdom number. Drop the leading 0: London's 020 becomes +44 20, a mobile written 07700 becomes +44 7700. The bigger trap is the number itself. UK 0800, 0845, 0300 and 0844 numbers are non-geographic and priced completely differently from each other, and many refuse international calls outright. From a browser on Airlophone there is no exit code at all: you type the number starting +44 and the price for that exact number appears before it dials.

+44. From the US you dial 011 first to leave the country, so the full string begins 011 44. From the UK and most of Europe the exit code is 00 instead, and from Australia it is 0011.

On Airlophone it starts at $0.05 a minute, billed per minute with part of a minute counting as a full one. The exact price depends on the band: landline $0.07, mobile $0.09, freephone $0.07, service number from $0.05 per minute. The band is read from the digits of the number itself, so you are never asked to guess whether a number is a landline or a mobile. Calling the same number on a mobile carrier's international direct dial or while roaming is charged separately by that carrier and is normally a great deal more.

The UK is 5 hours ahead of New York almost all year, with two short windows in spring and autumn where the clocks change on different dates and the gap becomes 4 hours. UK office hours end at lunchtime on the US East Coast.

No. Airlophone runs in a browser tab, so there is nothing to install and no SIM to buy, and it works the same on a laptop you have borrowed. The person you call needs nothing either: the call arrives on the ordinary phone network, so their phone rings whether it is a landline or a mobile and whether or not they have internet.