@waynel16751785  

If it's about storing in backend also as masked data,

you can write a function similar to pxGetMaskedValue_Text to get it done.

or you can substring first 3 numbers, last 4 numbers, remaining in-between numbers you can replace all with 'x' and later combine it.

If it's about particular should not see it in UI, you can write a control or you can just store above value in different property and display the above masked property in UI.