$ORIGIN 90.10.in-addr.arpa	; base for unqualified names
$TTL 1h				; default time-to-live
@				IN	      SOA ns.ffrgb. hostmaster.ffrgb. (
					2018011701; serial
					1d; refresh
					2h; retry
					4w; expire
					1h; minimum time-to-live
				)
				IN	NS	ns.ffrgb.
; Gateways
11.32   IN  PTR gw11.ffrgb.
21.64   IN  PTR gw21.ffrgb.
31.96   IN  PTR gw31.ffrgb.