Caller bot with the following message, "I am officer Nikki Johnson from Internal Revenue Services.
The hotline to my division is 323-744-7158. I repeat, it's 323-744-7158. Don't disregard this message, and do return the call before we take any action against you. Goodbye and take care."

The dialogue seems to be written by someone that does not have English as their native language.
When you call it rings and rings.