May possibly be LTD Financial. This number is listed as an "extra number" on this site:
http://www.yellowpages.com/nationwide/mip/sentrix-financial-services-469716740
(you may have to view source to see it, they have several extra numbers)
Just received a phone call on my cell phone from this number asking for my brother. My brother would never give out my number considering we don't even live in the same household. She asked to leave her name and number for him.
Same here. They call, several times a day, every day. But sometimes, They Do use an "866" area code.
They Never leave a voicemail message. Always comes in, as an "Unknown." And I never answer calls from numbers not in my contacts, or numbers that are unknown or blocked.