For general users looking for a fast, public DNS alternative to Google or Cloudflare, UltraDNS offers free recursive resolvers: Primary IPv4 Secondary IPv4 2. UltraDDR (Detection and Response)
The internet is moving toward encrypted DNS. Traditional DNS (port 53) sends queries in plain text, meaning your landlord, ISP, or anyone on Wi-Fi can see every website you visit. ultradns dns server ip
Some ISPs redirect all DNS traffic to their own servers, ignoring your settings. If nslookup google.com 156.154.70.1 works but nslookup google.com (without the IP) returns a different result, your ISP is hijacking DNS. The solution: Use or DNSCrypt . UltraDNS supports DoH at: https://recursive.ultradns.com/1 For general users looking for a fast, public
: For secondary DNS setups, specific IPs like 54.217.202.161 or 23.21.48.87 are used to sync data between servers. Developer Implementation Tips Some ISPs redirect all DNS traffic to their
One of UltraDNS’s killer features is security. By using different IPs, you can block malware or adult content at the DNS level without installing software.