That's wonderful news. Maybe your resume reflects experience in an area that these companies have a need for. Can't help but wonder what kind of positions these jobs are for.
My DH has been out of work for 20 months. Yes, 20 months. He has over 30 years experience in his field. His resume is posted with Careerbuilder, Monster, and several other online job sites. He is also registered with several employment agencies. In those 20 months, he's sent out over 300 hundred resumes in direct response to posted job opportunities and had about 20 interviews, with not one offer of employment. One company even interviewed him 4 times before determining that his background didn't meet the requirements for the position (huh?? you mean you didn't read resume before wasting everyone's time? ... but that's an entirely different story).
Another thing to beware of is that sometimes, jobs are posted that don't really exist. DH saw a job on Monster that was with company X. Well, he has a friend who works for Company X and so called him and asked about it. Friend says, that's odd, we don't have any openings, and are in fact, laying people off, but that would explain why we are being bombarded with resumes. HUH? Seems as though the online job service just reposted an old ad in hopes of getting Company X to renew their service.
Finally, DH did receive a couple of offers to interview for insurance companies for sales. Let's just say his resume reflects no background in insurance or sales. Why would these companies want him? They didn't really, just a fishing expedition.
Hopefully, one will pan out....but, if I were you, I wouldn't get too excited, at least not yet.