NS Lookup
Look up the name server records for any domain and analyze its DNS infrastructure.
An NS (Name Server) record specifies which DNS servers are authoritative for a domain. When your browser visits a domain, it first queries the NS records; those servers are the authoritative source for all other DNS records (A, MX, TXT, etc.).
NS records identify the authoritative servers that all DNS queries for your domain are directed to. Without them, the domain cannot function.
A, MX, TXT, and all other DNS records are managed on the NS servers. Switching DNS providers means updating the NS records.
When email or website access breaks, an NS lookup quickly confirms whether the DNS configuration is pointing to the correct servers.
NS records are changed in your domain registrar's panel — not in your DNS provider's panel. Confusing the two is a very common mistake.
Log in to the control panel of the registrar where you purchased your domain. NS changes are always made through the registrar, not the DNS provider.
Find the "Name Servers" or "DNS Servers" section in your domain settings and enter the NS addresses provided by your new DNS provider (usually at least 2).
ns1.proeposta.com
ns2.proeposta.com
NS changes propagate globally within 24–48 hours. Use the lookup tool above periodically to track when the change has taken effect worldwide.
Key points for keeping your DNS infrastructure reliable and fast.
Using a single name server is a critical risk. If that server becomes unreachable, the domain stops working entirely. Always define at least 2, preferably 4, distinct NS servers.
For high availability, your NS servers should be hosted in geographically separate data centers on different IP blocks. If one infrastructure fails, the others remain unaffected.
Before updating NS records, create all your DNS records (A, MX, TXT) at the new DNS provider first. Otherwise email and website downtime can occur during propagation.
Before a planned NS change, reduce the current TTL (e.g. to 300 seconds). This ensures old cached records expire much faster after the switch, minimizing any downtime window.
Reliable DNS management, free NS service, and 24/7 technical support on the Pro ePosta infrastructure — keep your domain secure.
