(This post is nerdy in nature and useless in purpose.)
Just noticed a small thing today: Airbnb has changed their reservation code. You know, the 2BE31A 6-characters long code that is only useful if you ever have to contact support.
That confirmation code was composed of 6 random characters from any letter of the alphabet and digit. Basically, that is 36^6 possible combinations, which cover 2 176 782 336 reservations. In practice, however, you don’t need to reach that number to start having problems.
Airbnb has today changed their reservation confirmation code to 10-characters. I don’t have a large enough sample to see how things are going, but I believe they will all start by “HM”, then the next 8 (may still) be completely a random character out of 36.
The fact that they start by HM is likely an indication for a “domain” such as “hosting property”. I actually do not know what the “M” would stand for, but I would expect “HE” for experiences and probably “FL”, “CR” for flights and car rental in the future.
With the remaining characters, that means 36^8, so 2 821 billion random codes available.
So, yeah, they are getting ready to take over the world.