dns zone walker, version 1.6.17 (ldns version 1.6.17)

*** invalid answer name after SOA query for --help *** No rrlist...;; ->>HEADER<<- opcode: QUERY, rcode: NXDOMAIN, id: 52481 ;; flags: qr rd cd ra ; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 0 ;; QUESTION SECTION: ;; --help. IN SOA ;; ANSWER SECTION: ;; AUTHORITY SECTION: . 86393 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2017031401 1800 900 604800 86400 . 86393 IN RRSIG SOA 8 0 86400 20170327170000 20170314160000 61045 . I8BxYZL0DAIvkhWN57bdRgxcnEFjkOWPVD0pYRYUGqe/hMChupi8Xyc5c2X6CtAJ3DOozPCsOt0/2xjH7Zh/7FcY8pNtJxk+fxfyU2GC10NPYzBCFGfR685gzZyIKC3vtp4QF1S5is1C983K6JiuOO7iman42YgoPGGbqunXrEvEjdGv0XYh56nryY7jj6PIrCotMrpeQF7nXI/ItH2fZeNwz1nKDFH0U7Llvg0UwE+efdOnlr7DfoMb7DeLHTIRj7TH8c32PUWpOCl8eCJOJN1qM6xBZwEUratPUnE27KF0R0CMgDL6VAYXymPxubFzi44uhFmlViNNpKDBMORTgw== . 86392 IN NSEC aaa. NS SOA RRSIG NSEC DNSKEY . 86392 IN RRSIG NSEC 8 0 86400 20170327170000 20170314160000 61045 . ELy/iwMVBwihgH65yF3pCRh+31N91sBJHk2tPzdF/LA5j1Skply3GRl3XYmucqqdEodfq/a5oagS5rJPpnMOKjdYXe/UqpK+hsBKEH3h/hRqoXBQfd4pekO68wkqnIo4z3eHlgSLatVmiLbXWyf2SfgJhFMp9dOVEjyDxMnQAYh6EnwnLR7ZUTqs3R7C9o6RYdJjzgkFhA1/xZMiEonMrgzQQzG1MQk62aGJPfuCoUC/clPMOEgydoWR3X/CnT898u+3ie5+RfWtZc18RIPejrfOBwMvyVK1obr2Y3Tqr8OPH8qQU/aAa631Dm/re7QbQ4JN0bYvSn0WNpX+TfFSZQ== ;; ADDITIONAL SECTION: ;; Query time: 14 msec ;; EDNS: version 0; flags: do ; udp: 512 ;; SERVER: 127.0.1.1 ;; WHEN: Tue Mar 14 20:10:06 2017 ;; MSG SIZE rcvd: 707