Enter a domain to see the DNS records that the internet uses to find it: the IP addresses it points to, the mail servers, the nameservers that answer for it and the TXT records like SPF. DNS changes take time to spread, so a lookup shows what the world sees right now.
Free and without registration. The check is made from our server, so the timings include the network distance to it.
DNS records are the instructions that tell the internet where your domain lives: which IP address serves the website (A, AAAA), which servers receive email (MX) and which nameservers hold the zone (NS). Browsers and mail servers read them before they connect.
DNS is cached along the way, and each record has a TTL (time to live) that says how many seconds resolvers may keep it. Until the TTL of the old record expires, some networks still see it. Lower the TTL before a planned change so it spreads faster.
TXT records hold text that other services read: SPF and DKIM for email authentication, and verification strings that prove you own the domain to Google, Microsoft and others. A wrong SPF record is a common reason email lands in spam.
One request shows the best case. Run a free load test with up to 1,000 concurrent connections, compare the results after every change and get an email when your site goes down.
Run a free load test