See https://en.wikipedia.org/wiki/Nslookup https://en.wikipedia.org/wiki/Nslookup In particular, note the following quote: “Unlike dig, nslookup does not use t

See https://en.wikipedia.org/wiki/Nslookup https://en.wikipedia.org/wiki/Nslookup In particular, note the following quote: “Unlike dig, nslookup does not use the operating system's local Domain Name System resolver library to perform its queries, and thus may behave differently. Additionally, vendor-provided versions may include output of other sources of name information, such as host files, and Network Information Service. Some behaviors of nslookup may be modified by the contents of resolv.conf.[2]”