{"id":36901870,"url":"https://github.com/jimmystewpot/in-addr","last_synced_at":"2026-01-12T15:47:58.590Z","repository":{"id":231483749,"uuid":"781861462","full_name":"jimmystewpot/in-addr","owner":"jimmystewpot","description":"A subnet to in-addr ptr address file creation 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Status](https://sonarcloud.io/api/project_badges/measure?project=jimmystewpot_in-addr\u0026metric=alert_status)](https://sonarcloud.io/summary/new_code?id=jimmystewpot_in-addr)\n\nA simple tool to take a subnet mask and print out the in-addr reverse order to stdout.\n\nThis simplifies creating entire network ranges of files for DNS reverse lookup etc.\n\n\n## IPv4\n\n```\n\n$ ./ptr generate 192.168.15.99/20\n0.168.192.in-addr.arpa.\n1.168.192.in-addr.arpa.\n2.168.192.in-addr.arpa.\n3.168.192.in-addr.arpa.\n4.168.192.in-addr.arpa.\n5.168.192.in-addr.arpa.\n6.168.192.in-addr.arpa.\n7.168.192.in-addr.arpa.\n8.168.192.in-addr.arpa.\n9.168.192.in-addr.arpa.\n10.168.192.in-addr.arpa.\n11.168.192.in-addr.arpa.\n12.168.192.in-addr.arpa.\n13.168.192.in-addr.arpa.\n14.168.192.in-addr.arpa.\n15.168.192.in-addr.arpa.\n```\n\n## IPv6\n\n```\n$ ./ptr generate 2001:db8:abcd:1234::1/56\n0.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n1.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n2.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n3.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n4.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n5.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n6.0.2.1.d.c.b.a.8.b.d.0.1.0.0.2.in-addr.arpa.\n....\n```\n\n## Building\n\n```\ngo build -o ptr cmd/in-addr/main.go\n```","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjimmystewpot%2Fin-addr","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjimmystewpot%2Fin-addr","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjimmystewpot%2Fin-addr/lists"}