10m quiet except for a net!

Tuned up and down the 10m band and its quiet except for a net from the Houston, Texas area on 28.488 at 8:00 CST. This group is S3-S7 on my Yagi at 165 degrees and I can hear them on the vertical but no meter movement. Interesting to listen to the Field day reports and conditions in Texas. Would have checked in but just having fun listening . I also don't have a 10-10 number and several other numbers they were exchanging. Here's several calls I heard-- WF5H,N5MT,K5WRN,KE5I AND N5JSL. Nice group of hams. OK ,I eventually threw out My call to make My prescence known and Mike, N5MT replied and gave a very nice explanation of the 10-10 number club. I might consider joining since 10m appears to now be a very viable band for Me.
  This net meets every tuesday night.
   73--Tim