Same thing here many others also call me between 3 and 9 a day block call list is very long this has been going on for 6 months it started after signing up for a test a product report on it keep it don't fall for free stuff really free
Although caller id says allenspark co - it could be from any where as people have the ability to change thier number temporarily thanks to an app found on google for androids and the apple apps. Since call backs report this number as no longer in service i beleive that this is the case. No message was left by the caller and call not answered.