nftable-migration
 1$TTL    604800
 2@    IN    SOA    ns1.vpn. admin.vpn. (
 3                  3        ; Serial
 4             604800        ; Refresh
 5              86400        ; Retry
 6            2419200        ; Expire
 7             604800 )    ; Negative Cache TTL
 8
 9; name servers - NS records
10@ IN NS ns1.vpn.
11@ IN NS ns2.vpn.
12
13; 3 IN PTR california.vpn.
14; 5 IN PTR hokkaido.vpn.
152 IN PTR ns1.vpn.
1616 IN PTR ns2.vpn.
1714 IN PTR okinawa.vpn.
182 IN PTR shikoku.vpn.
198 IN PTR wakasu.vpn.
2017 IN PTR aomi.vpn.
212 IN PTR shikoku.vpn
2216 IN PTR sakhalin.vpn.
2350 IN PTR rhea.vpn.
2449 IN PTR aion.vpn.
2583 IN PTR athena.vpn.
2682 IN PTR demeter.vpn.
2781 IN PTR hass.vpn.