Ran call for upstairs toilet gurgling randomly. This issue is being caused by a partial blockage in the 3” toilet line or blockage in the vent stack. I believe theres a partial blockage in the 3” line for the toilet because no other fixtures in that bathroom or home have had this issue. Both 2” pvc vent pipes coming through the rear roof of the home seem to be clear at this time. Also, this issue would be occurring all throughout the home if it was a venting issue and not just at one single toilet. Cleared upstairs toilet blockage with electric Milwaukee auger machine. Toilet is working as it should at his time with no issues. If this issue occurs again in the near future I recommend we return to pull the toilet and inspect the line. Emailed copy of todays invoice and estimates to homeowners email.