A lightweight shell script to test plain DNS, DNS over HTTPS (DoH) and DNS over TLS (DoT) resolvers.
wget -qO- https://raw.githubusercontent.com/itdoginfo/checkdns/refs/heads/main/checkdns.sh | shwget -qO- https://raw.githubusercontent.com/itdoginfo/checkdns/refs/heads/main/checkdns.sh | sh -s example.comwget https://raw.githubusercontent.com/itdoginfo/checkdns/refs/heads/main/checkdns.sh
chmod +x checkdns.sh
./checkdns.sh- Tests popular DNS resolvers (Cloudflare, Google, Quad9, AdGuard, NextDNS)
- Supports plain DNS, DoH and DoT protocols
- Clean output with status indicators (✅/❌)
- POSIX-compliant (works with sh, bash, ash)
- Custom domain testing support
digutility (version 9.18+)
- Debian/Ubuntu:
sudo apt install dnsutils - OpenWrt:
opkg install bind-dig - MacOS:
brew install bind - Termux"
apt upgrade dnsutils
🔓 Plain DNS (UDP)
✅ Cloudflare (5 ms)
✅ Google (29 ms)
✅ Quad9 (22 ms)
✅ AdGuardDNS (39 ms)
✅ NextDNS (14 ms)
🔒 DNS over HTTPS (DoH)
✅ Cloudflare (9 ms)
✅ Google (31 ms)
✅ Quad9 (57 ms)
✅ AdGuardDNS (40 ms)
✅ NextDNS (6 ms)
🔒 DNS over TLS (DoT)
✅ Cloudflare (49 ms)
✅ Google (46 ms)
✅ Quad9 (45 ms)
✅ AdGuardDNS (119 ms)
✅ NextDNS (113 ms)