[nznog] ip ranges

Hi everyone, Hope anyone can help me here. My problem is, some of our IP ranges appear to be filtered by some network providers. Could anyone please point me to the right direction or unblock our ranges ? Our ranges are : 202.20.0.0/21 - I believe this does not have any issues 202.68.80.0/21 - some blocks in this /21 have issues connecting to some sites, 202.68.86.0/23 Thanks kindly