djbdns-utils 1:1.05-15ubuntu2 (s390x binary) in ubuntu mantic

 This package provides number of tools for working with DNS, that can be used
 to diagnose misconfigured remote servers.
 .
  * dnsfilter - reverse-resolves IP addresses, converting them to host names.
  * dnsip, dnsipq - lookup IP addresses.
  * dnsmx - prints the MX records of fqdn.
  * dnsname - does a reverse lookup for the IP address.
  * dnsq - sends a non-recursive DNS query to DNS server.
  * dnsqr - asks for records of specified type under a the domain name
  * dnstrace searches for all DNS servers that can affect the resolution of
    records of specified type under a domain name, starting from the root
    server.
  * dnstxt - prints the TXT record of fqdn.
  * random-ip - print random IPv4 addresses.
 .
 This package also includes users guide to name qualification.