Most of these junk calls I get on my cell phone, a low-end, primitive flip phone. Many of the junk calls I get on the cell phone have the same area code+prefix (neighbor spoofing). Many others have only the same area code, while other have an area code from nearby NYC of Suffolk County. Not wanting to hear my phone ring or burn minutes engaging with a caller, I simply flip my phone open an inch before letting it close, terminating the call.
The land line has a caller-ID if my TV is on to display it. Most of the time, there is a name associated with the unknown caller. Sometimes, I don't recognize the name, especially if it's one of those neighbor spoofing calls like I get on the cell phone. Out-of-town numbers rarely have a name with them.
In either case, I post the call to 800notes.com, a website good for passing along your experiences with these things. For most of my junk calls to either phone, the number is unique - neither I nor anyone else has ever posted there. Once in a while, someone else has posted a similar experience, either recently or a few years ago.
I don't call any of these numbers back, unless they have called multiple times and/or left voice mails and I have the caller's number. I had some foreclosure guy call me several times in the last few weeks, leaving voice mails (which I can retrieve without using my cell phone's minutes).
Junk texts have been giving me some problems, too. One lender has texted me several times over the years. I have called them back a few times, demanding they stop texting me. Doesn't usually work although it has been a while since they last texted me. I once got a text from someone who claimed I junk-texted him (someone spoofed my number). I told him it was spoofed and all was okay, leaving both of us mildly annoyed.