How can I stop the whole state of Texas from calling my number?

I get about 5-6 calls daily (6:30am to 4pm-ish) from the whole state of Texas. My phone number is just one digit away from matching another number with the area code for Texas (which is 936, mine is 939 for PR). The number leads to this automated system that I can't understand, and it’s asking me immediately for a pin every time I call. I Googled it, and the only thing that comes up is Montgomery County Adult Probation. It’s not spam calling me nor telemarketers, it’s real people, because sometimes I answer and either no one talks or they say: “sorry wrong number.” What can I do? I’ve had my number for over 10 years, and I don’t want to change it. I know nobody in Texas, so I don’t want anyone calling me from there. Any app around or something? I don’t care if I have to pay a monthly fee.