geo-soa-values=a.ns.openstreetmap.org,hostmaster.openstreetmap.org
# The NS records for the zone
-geo-ns-records=a.ns.openstreetmap.org
+geo-ns-records=a.ns.openstreetmap.org,b.ns.openstreetmap.org,c.ns.openstreetmap.org,d.ns.openstreetmap.org
# Map IP addresses to geographic zones
geo-ip-map-zonefile=/etc/powerdns/countries.conf