Listening for that DNS propagation

Note to self.

I've had the joy of bringing a few sites live the last days, and in one case it was a multi-site with 7 different domains.

During the process I needed a simple overview of the DNS propagation status. Before I've used online sites for this kind of stuff, but this time i reached for a CLI way instead, which I ended up liking.

I used the watch command in the CLI for this (installed via brew) to continually watch it.

Example 1:

Look up eddiedale.com, vasser.no and sans.supply every 10 seconds via the 1.1.1.1 DNS

watch -n 10 'for d in eddiedale.com vasser.no sans.supply; 
   do printf "%-32s %s\n" "$d" "$(dig +short "$d" @1.1.1.1 | head -1)"; 
done'

Example 2:

Listening to a single domain (every 5 second in this example), but from multiple DNS-resolvers (if thats the right word for it).

Here watching Google, Cloudflare, Quad9 and OpenDNS.

watch -n 5 'for r in 1.1.1.1 8.8.8.8 9.9.9.9 208.67.222.222; do
  printf "%-16s %s\n" "$r" "$(dig +short eddiedale.com @$r | tr "\n" " ")"
done'