Looks to be that Elon's jet is headed to Europe
You may notice that tracking is more sporadic. This is because ADS-B is ground-based, over the water we rely on ADS-C and ACARS, which is satellite-based. An example below is from one of the hobbyists that feed satellite signals to ADSBExchange. The one in the back has been picking up signals for the current flight, this is a California-based ground station. In about 2 hours we will be picking up a signal from the UK one.
@elonjet Hej, I'm running ADSB-B to #Adsbexchange. Do you have some pointers how to extend to ADSB-C and how to feed?
@Morgennebel @elonjet
Contrary to ADS-B which is broadcast by the airplane, ADS-C is transmitted only on request (about every 10mn or so) and goes over inmarsat, I believe it would be rather complicated to listen in...
@sxpert @elonjet This exact thread starts with a picture of satellite dishes and the term hobbyists feeders. I am only asking how can I do the same...
@Morgennebel @elonjet you'd need to build something like the NSA was using in the 80's (remember ECHELON ?) to decode the inmarsat traffic, which then may be encrypted
@sxpert @elonjet https://forum.flightradar24.com/forum/radar-forums/flightradar24-feeding-data-to-flightradar24/188738-ads-c-support-added
Follow the bitly Adress will open a Google file PDF. Much smaller and a nice new project...
ADS-C support added - Flightradar24 Forum

Hi all, I am happy to announce that we have added support for ADS-C data. One of our members Andrew rch38084 has written a detailed guide on how to start and get your setup going (thank you, Andrew). If you are interested in setting up your ADS-C feed, please take a look and if you have any questions you can ask Andrew for

Flightradar24 Forum
@elonjet @Morgennebel I would suggest taking a look at @thebaldgeek ‘s info. He is the expert on this.