Comes up as a hotel in Austria:
http://worldhotelsbook.com/en/PALAIS_HANSEN_K ... o-VIE-PAL8.aspx
but I'm not so sure. I have two separate telephone lines, each with a different number, but the last two numbers are close in sequence, and one rang within a minute after the other, so I suspect robo calling is somehow involved.  Actually, I think the whole thing is bogus...that if the hotel number is actually this one, that whoever called is using the hotel's number for (false) legitimacy reasons.