This frequency is active every single day. I have locked it out of my search group for this reason. If you have a decent antenna and preamp you can here numerous active frequencies with pirates but it gets boring very quick.
I've been listening to 255.550 (and, more recently, 265.550) for years by doing nothing more than attaching a whip (i.e. RH77-CA or similar) to my handheld. I orient the antenna so it's parallel to the ground, and slowly turn in a circle until the carrier & pirates are heard. Squelch is wide open.
I have done this with a VR-500, BC330T, and numerous Yaesu HTs. I am usually outside, but it works inside the house too.