🌐 DNS Lookup Tool
Look up any domain or IP and see its live DNS records: A, AAAA, CNAME, MX, NS, TXT, SOA and PTR. Use it to check where a website points, find a domain\u2019s mail server, verify SPF and DKIM TXT records, or confirm a BDIX hostname resolves to a private 10.x IP. Every result is a fresh query from our server, nothing is cached, so what you see is what is published right now.
Enter a domain to see its DNS records. A/AAAA = where the site lives, MX = its email servers, NS = its nameservers, TXT = verification & security records. A healthy site usually has A (or AAAA), NS and MX records.
How This DNS Lookup Works
When you submit a domain, our server asks the system resolver for each record type (A, AAAA, CNAME, MX, NS, TXT, SOA) and returns whatever is currently published. For an IP address it also performs a reverse (PTR) lookup. There is no cache on our side. Every result is a fresh query.
Note that your ISP may run its own caching resolver, so a record you just changed can appear slightly later here than on an authoritative server. That is normal DNS behaviour, not an error.
DNS Record Types Explained
| Type | What it does | Example |
|---|---|---|
| A | Maps a name to an IPv4 address | 192.0.2.10 |
| AAAA | Maps a name to an IPv6 address | 2001:db8::10 |
| CNAME | Alias pointing one name to another | www → example.com |
| MX | Mail servers that accept email | 10 mail.example.com |
| NS | Authoritative nameservers for the domain | ns1.example.com |
| TXT | Arbitrary text: sPF, DKIM, verification | v=spf1 … |
| SOA | Start of authority: zone serial & timers | ns1.example.com |
| PTR | Reverse: IP address → hostname | host.example.com |
When to Use a DNS Lookup
- Checking that a domain correctly points to its web server after a hosting move.
- Verifying MX and SPF/TXT records before troubleshooting email delivery.
- Confirming a BDIX server hostname resolves to the expected private IP.
- Diagnosing whether a “site not loading” problem is DNS or the server itself.
- Auditing the nameservers (NS) a domain is delegated to.
On BDIX, hostnames like server3.ftpbd.net often resolve to private 10.x IPs that only work inside Bangladeshi ISP networks. A quick lookup shows both the hostname and the IP, so you can tell local traffic from public traffic apart.
FAQ (Frequently Asked Questions)
What Is a DNS Lookup?
A DNS lookup asks a resolver for the records stored for a domain: for example which IP address (A record) a website lives at, or which server accepts its email (MX record). This tool runs those queries for you and shows the raw answers.
What Is the Difference Between an A Record and an AAAA Record?
An A record maps a domain to an IPv4 address (like 192.0.2.10). An AAAA record maps it to an IPv6 address (like 2001:db8::10). Modern websites should publish both so IPv4- and IPv6-only users can connect.
What Does an MX Record Do?
MX records tell the world which mail servers accept email for a domain, and in what order (the lower the priority number, the higher the preference). A missing MX record means the domain cannot receive email normally.
What Is a CNAME Record?
A CNAME is an alias: it points one hostname at another (for example www.example.com → example.com). The resolver then looks up the target name separately. CNAMEs cannot be used on a bare apex domain.
Why Does My Lookup Show No Records?
The domain may be newly registered, its records may not have propagated yet, it may genuinely have no records of that type, or your DNS resolver was temporarily unreachable. Try again in a minute or check a different record type.
How Long Do DNS Changes Take to Appear?
Each record has a TTL (time to live) in seconds. Resolvers cache records for up to that long, so changes can take anywhere from a few minutes to 24–48 hours to be visible everywhere, depending on the TTL.
What Is Reverse DNS (PTR)?
A PTR record does the opposite of an A record: it maps an IP address back to a hostname. It is used mainly for email deliverability and server identification, and only works when the IP owner has configured it.