diff --git a/nginx.conf b/nginx.conf
index 099f6ac5..68123a76 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -157,23 +157,26 @@ location /INSTANCE {
   # -- https://adsb.lol/EHAM -> https://adsb.lol/?airport=EHAM --- if 4 a-z
   # -- https://adsb.lol/AMS -> https://adsb.lol/?airport=AMS --- if 3 a-z
   # -- https://adsb.lol/lat,lon -> https://adsb.lol/?lat=lat&lon=lon --- if , is found
-  # -- https://adsb.lol/KLM94G -> https://adsb.lol/?callsign=KLM94G --- if above not matched
+  # -- https://adsb.lol/KLM94G -> https://adsb.lol/?reg=KLM94G --- if above not matched
   # regex woot woot!
   # offload to @fallback on   error_page 404 = @fallback;
 
   location ~* "^/(?<airport>[a-zA-Z]{3,4})$" {
+    # /AMS, /EHAM, etc.
       content_by_lua_block {
           ngx.redirect("/?airport=" .. ngx.var.airport, ngx.HTTP_MOVED_TEMPORARILY)
       }
   }
 
   location ~* "^/(?<icao>[0-9a-fA-F]{6}(?:,[0-9a-fA-F]{6})*)$" {
+    # /000000, /ffffff, etc
       content_by_lua_block {
           ngx.redirect("/?icao=" .. ngx.var.icao, ngx.HTTP_MOVED_TEMPORARILY)
       }
   }
 
   location ~* "^/(?<lat>[0-9.-]+),(?<lon>[0-9.-]+)$" {
+    # 0,0 , 1,1 , -180,-180, etc.
       content_by_lua_block {
           ngx.log(ngx.ERR, "lat: " .. ngx.var.lat .. " lon: " .. ngx.var.lon)
       }
@@ -187,7 +190,8 @@ location /INSTANCE {
       }
   }
 
-  location ~* "^/(?<reg>[a-zA-Z0-9-]{5,6}(?:,[a-zA-Z0-9-]{5,6})*)$" {
+  # registration
+  location ~* "^/(?<reg>[a-zA-Z0-9-]{5,12}(?:,[a-zA-Z0-9-]{5,12})*)$" {
       content_by_lua_block {
           ngx.var.reg = ngx.re.gsub(ngx.var.reg, "-", "")
           ngx.redirect("/?reg=" .. ngx.var.reg, ngx.HTTP_MOVED_TEMPORARILY)