How to safely pull Internet cable out of soil?
Couple things here.

There is a good chance you don't have enough cable to do this.  Before even thinking about it you will need to check the slack on both sides.   If there are hooked up outside and then wired inside, there is hardly ever slack to pull an extra couple feet.   It is annoying because I have had to have providers rerun our yard different times.

You have to dig up all the way in one direction, can't just dig up 10 feet and scootch it over.   It will be too tight.

ISP could just come out and run another line...  They might charge you.   If they don't for sure just have them do it.   If they don't maybe you go to another provider and &quot;cut this cord&quot; so new provider has to run cable where you want it.


So this cable if you are in the US and it is not electric, water (you may own this) or gas is your property.   ISP or cable company or dish, they are basically giving you this cable as part of your contract with them.   You own it - you paid for it.   If it goes to a box/dish/whatever to your house, it is yours.   If it is buried going from box to box that is a gray area (you are not liable for cutting it but may have angry neighbors!).
Also note: most ISPs and cable internet companies are not part of 811 dig in an overall way.   They will coordinate with 811 if they think there is a high risk area - they plow a main line right through a group of backyards - but other than that they are only usually coming out and marking if someone dug up something before.