Caller ID says "Waterbury CT". They leave no message.
I call back after hours (using *67 to block my number). Their outgoing message is somewhat garbled (particularly their name). Here is my best shot at their message, "You have reached lip progress tele-services. We place calls on behalf of many political and non-profit clients and organizations. If you would like to be removed fron our calling list please press 1 now." (I never use a firm's do-not-call list as it can actually make things worse).
I googled their message, and found a similar message from "New Partners Tele-Services". They seem to do (or pretend to do) political fundraising for liberal groups.
I have noticed a marked increase in political calls lately. So, in my case, they are likely either calling for (or pretending to call for) a political campaign. In either case, I don't respond to phone solicitations.