Free Online DNS Lookup
This DNS lookup tool quickly fetches domain records by querying the Cloudflare public resolver (1.1.1.1) over a secure DNS-over-HTTPS connection. Simply enter a domain and pick your record type to see structured data, TTL values, and DNSSEC validation details. You have access to six specialized utilities for everything from standard lookups and reverse DNS to MX, NS, and TXT record audits, including bulk processing. Get started by typing a domain directly, or just drag and drop a text file onto the workspace.
DNS Lookup
Queries A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA, or PTR records for any domain with type selection and TTL display.
Reverse DNS
Resolves an IPv4 address to its hostname by querying the PTR record in the in-addr.arpa zone.
MX Lookup
Finds mail exchange servers and their priority values for any domain to verify email routing.
NS Lookup
Identifies the authoritative nameservers responsible for DNS resolution of a given domain.
TXT Lookup
Retrieves TXT records including SPF, DKIM, DMARC, and domain verification entries.
Bulk DNS
Processes up to 30 domains at once from a file or pasted list and shows A record results in a table.
Online DNS Lookup with Record Type Selection
DNS lookups act as a bridge, translating human-friendly domain names into the technical records that keep the internet running. Once you provide a domain and choose A records, you will see the exact IPv4 addresses associated with it. You can also query AAAA records for IPv6 addresses or CNAME entries to find aliases. Every result provides the essential record data along with the time-to-live (TTL) value and the official protocol status code. Scanning through large sets of results is simple thanks to the color-coded badges and organized summary cards.
Upload Domains from a File
To save time, you can drag a text file into the upload area or browse your files instead of typing names manually. The tool automatically identifies the first valid domain in your file and starts the lookup immediately. All common formats like .txt, .csv, and .log are fully compatible. If you need to check several domains at once, the Bulk DNS tab lets you process up to 30 entries in a single batch.
Query History and Quick Re-runs
Your session history panel automatically tracks every successful query for easy reference. Just click any entry in the list to reload those settings and re-run the lookup with a single click. Each history item displays the domain, record type, and a timestamp, helping you stay organized as you investigate multiple domains.
MX, NS, and TXT Record Lookups
In addition to standard A and AAAA queries, you can use three specialized tabs to dive into specific record types without fiddling with dropdown menus. The MX Lookup tool pulls the mail exchange records that manage email routing, including hostnames and priority levels. Use the NS Lookup tab to identify authoritative nameservers, which is a key step when troubleshooting DNS delegation. Finally, the TXT Lookup utility gathers every text record linked to a domain, from SPF and DKIM policies to DMARC settings and ownership tokens.
Verify Email Configuration with MX Records
Auditing MX records is the best way to ensure your email routing is configured as intended. The priority values assigned to each mail server dictate the order of delivery, with lower numbers representing the primary servers and higher numbers acting as backups. If you are in the middle of a migration or launching a new domain, checking these records is a great way to verify that your DNS changes have finished propagating across the web.
Check SPF and DKIM with TXT Records
Common TXT records like SPF (starting with "v=spf1") define which servers are authorized to send email for your domain, while DKIM entries hold the public keys used for signature verification. You will also find DMARC records on the _dmarc subdomain, which tell receiving servers how to handle authentication failures. This tool displays all these critical security records in one place so you can audit your entire email authentication stack at once.
Free DNS Lookup with Reverse DNS and Bulk Processing
Reverse DNS resolution maps an IP address back to its associated hostname by querying PTR records in the in-addr.arpa zone. If you have a public IPv4 address, you can enter it in the Reverse DNS tab to see its hostname. This utility is particularly helpful for network forensics, verifying mail servers, or tracking down the owner of an IP. For larger tasks, the Bulk DNS tab handles up to 30 domains in a row, fetching A records and presenting them in a clean table with live updates as it progresses through your list.
Reverse DNS for Mail Server Verification
A lot of mail servers perform reverse DNS checks on incoming connections to filter out suspicious traffic. If your sending IP lacks a valid PTR record that matches your domain, your emails might end up in a spam folder or get rejected by the recipient. You can use the Reverse DNS tab to double check your server IPs and ensure your records are accurate before you start sending out important email campaigns.
Export and Download Results
You can quickly copy any result set to your clipboard or download it as a tab-separated values (TSV) file using the toolbar options. Bulk DNS exports come formatted with domain and record columns, making them perfect for spreadsheet work. If you are performing individual lookups, your exports will include the full list of records with type, TTL, and data fields for your documentation or reports.
Related DNS and Network Tools
If you work with DNS and networking regularly, these tools complement what you can do here:
- IP Address Lookup -- find geolocation, ISP, and network details for any IP address
- JSON Formatter -- format and validate JSON output from API responses
- Base64 Encode -- encode and decode Base64 data
- URL Encode -- encode and decode URL components
- Hash Generator -- generate MD5, SHA-1, and SHA-256 hashes