dig is DNS client tool to make dns lookup. Part of bind9
The containing package name is:
curl -L https://github.com/sequenceiq/docker-alpine-dig/releases/download/v9.10.2/dig.tgz|tar -xzv -C /usr/local/bin/
Google has in its toolbox, dig in an online form. See https://toolbox.googleapps.com/apps/dig/
yum install bind-utils
apt-get install dnsutils
# https://packages.ubuntu.com/kinetic/bind9-dnsutils
apt-get install bind9-dnsutils