They seem to be very busy from the trail of calls listed here. Same experience for me... got a call on my cell from this number today at about 4PM - no message left, and when I called back, it was an invalid number. I am on a no-call list, so this is improper any way you view it!

They have been..

http://www.northcountrygazette.org/2015/07/08/med-rev_shuttered/
http://800notes.com/forum/ta-c3355f57425c0d5/ ... alls-to-the-fcc
http://800notes.com/forum/ta-c5c7e69f0670886/ ... -spoofing-calls
http://800notes.com/forum/ta-c46b87360deec56/ ... -unwanted-calls
http://800notes.com/forum/ta-c89eda780098619/pay-up#p903577742355908092
http://www.cbsnews.com/news/payday-lenders-could-face-federal-rules/
http://www.cbsnews.com/news/online-payday-len ... 85m-in-charges/
https://www.ftc.gov/news-events/press-release ... ocalls-pitching
http://money.cnn.com/2014/11/18/news/debt-collectors-arrest/
http://www.nbcnews.com/business/consumer/ftc- ... n-texts-n374341
http://800notes.com/forum/ta-c4ffa8334de58ff/georgia-dc-out-of-business

Enforcement:
http://800notes.com/forum/ta-c33b770fc3695c0/ ... -associates-llc
http://800notes.com/forum/ta-c874444fd0727bb/ ... e-telemarketers
http://800notes.com/forum/ta-c17c24b9614a487/ ... ttery-scam-case
http://800notes.com/forum/ta-c116acd736280bb/ ... h-telemarketing
http://800notes.com/forum/ta-bfcd4eb5e5bf6d6/ ... y-ftc-and-il-ag
http://800notes.com/forum/ta-bf7e49d2ddb0453/ ... e-dnc-violation
http://consumerist.com/2015/04/08/robocalling ... ding-consumers/
http://transition.fcc.gov/eb/
http://www.consumerfinance.gov/blog/category/enforcement/
http://www.ftc.gov/enforcement
http://www.ftc.gov/opa/2013/09/ambrosia.shtm
http://www.ftc.gov/os/caselist/1223190/
http://www.consumerfinance.gov/newsroom/

Consider getting a call blocking device or phone.. You can google them and many are around $40.00 or so. If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number. For tracfone & straight talk:
https://play.google.com/store/apps/details?id ... .tracfone&hl=en

http://extras.straighttalk.com/en

http://www.youmail.com/home/carriers/straight-talk/block-number

https://www.straighttalkwirelessforum.com/viewtopic.php?f=6803&t=55006

Report your callers here, not just to the DNC alone:

https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2

For text messages: forwarding any text message spam you get to the short code  “7726,” which spells “spam” on most phones, to alert your network operator to the abuse. ATT won't accept 7726 But they will accept BLOCK and return a message that the web site is blocked. forward the texts to 7726 or BLOCK, depending on your phone carrier.

By State DNC lists:
http://800notes.com/res/DoNotCall.aspx

FCC Abandoned Calls Complaint form:
http://www.fcc.gov/cgb/consumerfacts/1088D-R.pdf
email:  fccinfo@fcc.gov

To file complaints on Foreign company's:
eConsumer.gov: Report Your Complaint
E-mail: econsumerwb@ftc.gov