Credit score dropped over 110 points for no reason?

[Emily Fraser]

Hi everybody, 

I'm a newbie looked to purchase my first rental property with a conventional loan. I applied with a few lenders and they pulled my credit score. Both commented that I had an excellent score, in the high 700 range. 

This month, I got an alert from my credit wise account that my credit score had dropped to 630?? I have not taken out any new lines of credit or a mortgage and I have no idea why it dropped so drastically. I pulled my full credit report and can't see anything suspicious or unusual. I have zero debt and I really don't understand this sudden change. My credit score history has been steady and unchanged for the past several years. 

Any insights? I'm kind of bummed out- I was proud of my credit score! Thanks in advance for any advice.