Server List

NatBench ships with 170+ built-in servers (v1.1.0) across these categories:

Recommended (anycast / fast)

Server	IPv4	DoH	DoT
Cloudflare Primary	1.1.1.1	✓	✓
Cloudflare Secondary	1.0.0.1	✓	✓
Google Primary	8.8.8.8	✓	✓
Google Secondary	8.8.4.4	✓	✓
Quad9 Primary	9.9.9.9	✓	✓
Quad9 Secondary	149.112.112.112	✓	✓
dns.wonx.eu	145.239.0.143	✓	✓

Cloudflare Malware Blocking, CleanBrowsing Security, AdGuard DNS Unfiltered, Quad9 Unfiltered, …

Mullvad DNS, RethinkDNS, Control D (No Filters), dns0.eu, …

OpenNIC US/EU/DE, FDN (France), Freifunk München, CCC DNS, …

Servers specific to China, Russia, Canada, Asia.

Major ISP resolvers by country — useful for benchmarking against your actual provider:

Country	ISPs
🇩🇪 DE	Deutsche Telekom, Vodafone, O2/Telefónica
🇦🇹 AT	A1 Telekom Austria
🇨🇭 CH	Swisscom
🇳🇱 NL	KPN, Ziggo
🇫🇷 FR	Orange, Free SAS, SFR
🇬🇧 GB	BT Group, Virgin Media, Sky
🇺🇸 US	Comcast Xfinity, AT&T, Verizon FiOS, Charter Spectrum
🇨🇦 CA	Rogers, Bell Canada, Telus
🇦🇺 AU	Telstra, Optus
🇯🇵 JP	NTT Communications, SoftBank
🇨🇳 CN	China Telecom, China Unicom
🇷🇺 RU	Rostelecom, MTS
🇧🇷 BR	Vivo Brasil, Claro Brasil
🇮🇳 IN	BSNL, Bharti Airtel

Also: ipv64.net (Hetzner-hosted, DoH + DoT, German datacenter)

Via GUI: enter IP (or ip:port) in the Custom Server box and click Add.

Via CLI:

natbench --server 192.168.1.1 --server 192.168.1.1:5335

Via plugin: implement SourcePlugin.get_servers() — see Configuration.

Tag	Meaning
`fast`	Sub-30ms expected latency
`anycast`	Globally distributed anycast network
`no-log`	Operator claims no query logging
`malware`	Blocks known malicious domains
`ads`	Blocks ad-network domains
`dnssec`	Validates DNSSEC signatures
`isp`	Residential ISP resolver
`community`	Community-operated, non-commercial