Just received a call from this number at 7:11AM. Didn't recognize the number so I didn't answer. A cut off voicemail was left saying that I should call them back due to some time sensitive matter.

Called back. Asking for my personal info. I hung up.

Phishing scam call claiming the IRS is suing you and to call back with lawyer.

IRS never phones people about suing them. That's usually done in writing.