// http://www.he.net/adm/reverse.dns.html (RFC4183 notation)
D(DOMAIN, REGISTRAR, DnsProvider(PROVIDER),
  PTR(DRIBBLE_IPV4.split(".").pop(), "dribble.openstreetmap.org."),
  PTR(DULCY_IPV4.split(".").pop(), "dulcy.openstreetmap.org."),
  PTR(FAFFY_IPV4.split(".").pop(), "faffy.openstreetmap.org."),
  PTR(IRONBELLY_IPV4.split(".").pop(), "ironbelly.openstreetmap.org."),
  PTR(NORBERT_IPV4.split(".").pop(), "norbert.openstreetmap.org."),
  PTR(ODIN_IPV4.split(".").pop(), "odin.openstreetmap.org."),
  PTR(SPIKE06_IPV4.split(".").pop(), "spike-06.openstreetmap.org."),
  PTR(SPIKE07_IPV4.split(".").pop(), "spike-07.openstreetmap.org."),
  PTR(SPIKE08_IPV4.split(".").pop(), "spike-08.openstreetmap.org."),
  PTR(VHAGAR_IPV4.split(".").pop(), "vhagar.openstreetmap.org."),
  PTR(SWITCH1AMS_IPV4.split(".").pop(), "switch1.ams.openstreetmap.org.")
);
