[44net] DNS A record registration under AMPR.org

Hello, I'm setting up my 44NET gateway at home. According to the different wiki documents, i need have some of my assigned IPs registered as A record under ampr.org, so that AMPRGW(169.228.34.84) could allow the traffic from the Internet. I tried to reach out to my local co-ordinator, which is "AMPRNET", on the Portal. Tried a few times, but didn't get any response. I'm wondering if I reached out from the wrong channel. So just want to ask, what's the correct way to request a DNS record under ampr.org? Many Thanks, Billy Yao