First do not answer calls you do not know, second do not call them back and third get a call blocker. They're available online. They start around $40.00. http://800notes.com/nb/search?q=call+blockers
When you do a Neustar query on this number it shows that it isn't actually assigned to the TN industry yet, meaning that whoever is setting their caller ID as this is spoofing the number they are sending out:
"718-033-8531
The NPA-NXX for this TN has not been assigned by the industry and does not exist in NANPA "
That's because there are no "033" exchanges/prefixes.
The numeral "0" and the numeral "1" are never the first digit in any exchange/prefix.
The numeral "0" and the numeral "1" are never the first digit in any area code either.
(within Canada and the USA).