to your knowledge

to (one's) knowledge

Said of that which one knows or understands. A: "Is Janet coming in today?" B: "Not to my knowledge." To my knowledge, Jack is working a different shift these days. But Jill makes the schedule, so she would know for sure.
See also: knowledge
Farlex Dictionary of Idioms.

to your ˈknowledge

from the information you have, although you may not know everything: ‘Are they divorced?’ ‘Not to my knowledge.’
See also: knowledge
Farlex Partner Idioms Dictionary
See also:
  • to (one's) knowledge
  • have a working knowledge of (something)
  • have a working knowledge of something
  • to the best of (one's) knowledge
  • knowledge
  • prophet
  • prophet is not without honor save in his own country
  • a prophet is not without honor save in his own country
  • (Don't ask me,) I just work here.
  • (Don't ask me,) I only work here.