When do the recruiters stop calling?

Over the last few months, I've gotten more inquiries via email and phone calls from recruiters than I recall ever getting in the past. Now that I'm gainfully employed by a large employer, I seem to be a target for recruiters. Is it recruiters' MO to target skilled people working at large companies? I've only been in this job about 6 weeks; do people think I'm just going to jump ship? Of course I'm not going to do that.

How do I stop them from calling (at least for now :-))?