Zsh script to test if domain blocked

dnstest.sh

#!/bin/zsh

domain=

function test_dns() {
	echo ""
	echo "Testing on $1"

	result=$(dig @$1 $domain)

	if [[ -z "$(grep -i 'ANSWER SECTION:' <<< $result)" ]]
	then
		echo "[Blocked] Server returns no ANSWER SECTION!"
	else
		echo "[Not blocked] Server returned: $(grep -i -A 1 'ANSWER SECTION:' <<< $result)"
	fi

	echo ""
}

echo "Testing $domain"
echo "<SKT>"

test_dns 219.250.36.130
test_dns 210.220.163.82

echo "<KT>"

test_dns 168.126.63.1
test_dns 168.126.63.2

echo "<LG>"

test_dns 164.124.101.2
test_dns 203.248.252.2

echo "<CloudFlare>"

test_dns 1.1.1.1
test_dns 1.0.0.1
test_dns 1.1.1.2
test_dns 1.0.0.2

echo "<Google>"

test_dns 8.8.8.8
test_dns 8.8.4.4