Free, real-time WHOIS lookup for any of 500+ TLDs. See registrant, registrar, creation date, expiry, name servers, status codes, and domain age. Detect WHOIS privacy, track expiry, find related domains — no signup, no limits, no ads.
WHOIS isn't just for nerds. Marketers, brand owners, journalists, lawyers, and domain investors use it daily. Here are the three most common use cases.
Wondering who owns that domain you stumbled on? Want to know when a competitor's site was launched? WHOIS gives you the answers in seconds.
Looking to buy a domain from someone? WHOIS tells you who to contact, how long they've owned it, and how to negotiate from a position of knowledge.
Someone registered a domain similar to your trademark? WHOIS is step one in any UDRP complaint, cease-and-desist letter, or trademark enforcement action.
From query to full record in under a second. We hit the live RDAP/WHOIS registry servers, parse the response, and present a clean structured view — no raw text dumps.
Type any domain (e.g. example.com). We auto-detect the TLD and route the query to the right registry server.
We hit the authoritative RDAP server (modern) or fall back to classic WHOIS port 43. Response is parsed in real-time.
0.4–0.8sRaw text is parsed into clean fields: registrant, registrar, dates, name servers, status codes. Privacy is auto-detected.
<0.1sResults appear in structured cards. Export to CSV, PDF, or JSON. Save to history. Set up monitoring alerts for changes.
InstantEvery free WHOIS lookup returns the full record — not a teaser. Here's everything you see, plus the advanced tools available when you create a free account.
Registrant, admin, tech, billing contacts. Name, organization, email, phone, address. No truncation, no hiding fields.
We auto-detect WHOIS privacy services (Domains By Proxy, Perfect Privacy, Withheld for Privacy, etc.) and flag them.
See exact domain age in years, months, and days. Older domains rank better and sell for more — know the value.
See when the domain expires, days remaining, and a one-click link to renew (yours) or grab (if it lapses).
Full name server list, plus A, AAAA, MX, TXT, SOA, NS records. See where the domain is hosted and how it's configured.
20+ years of historical WHOIS records. See who owned the domain before, when it changed hands, and what changed.
Search by owner name, email, or organization. Find every other domain owned by the same person or company.
Paste up to 50 domains at once. Get a structured table with status, registrar, expiry, and age for each. Free, no signup.
clientTransferProhibited, serverDeleteProhibited, addPeriod, etc. — we translate EPP status codes into plain English.
Registrar name, IANA ID, abuse contact, URL, and phone. One click to file an abuse complaint with the right registrar.
Free account users can monitor any domain and get email alerts when WHOIS data, name servers, or expiry changes.
Export any lookup result to CSV for spreadsheets, PDF for reports, or JSON for integration. Free, unlimited downloads.
Paste a list of domains (one per line), get a structured table with status, registrar, expiry, and age for each. Free for everyone — no signup, no rate limit. Perfect for domain investors, brand monitors, and SEO audits.
What looks like a simple search box is actually 8 tools working together: a real-time RDAP/WHOIS query engine, a privacy detector, a 20-year historical archive, a status-code translator, a reverse-WHOIS finder, a bulk processor, a change monitor, and an export suite.
Two of our most-requested advanced tools. Reverse WHOIS finds every domain owned by a person or company. Domain Age Calculator shows exactly how old any domain is — a key factor in SEO value and domain resale price.
Find all domains owned by the same person, email, or organization. Used by brand owners to find cybersquatters, by journalists to map networks, and by investors to spot domain portfolios.
Domain age = years since the domain was first registered. Older domains rank higher in Google, sell for more, and inspire more trust. See the exact age of any domain.
Tip: run any WHOIS lookup above — the age calculator auto-populates with that domain's data.
From a brand lawyer to a domain investor to a startup founder — here's how real SylhetHost WHOIS users put the tool to work.
As a brand lawyer, I file 30+ UDRP complaints a year. SylhetHost's reverse WHOIS let me find 14 cybersquatted domains owned by the same person in one search — then export the list as evidence for the WIPO complaint. Saved me weeks of work.
I invest in 50-100 domains a year. Before buying, I always run a WHOIS lookup here to check domain age, expiry, and previous owners. The historical archive caught one seller lying about "never owned before" — saved me 8,000 BDT on a bad buy.
We were about to launch our startup's brand name when a WHOIS lookup here showed the matching .com was registered yesterday by a competitor in our city. We pivoted to a new name before spending on marketing. Best 30 seconds we ever spent.
Everything you wanted to know about WHOIS lookups — what data you can see, why some domains show privacy, what RDAP is, how reverse WHOIS works, and more.
WHOIS (pronounced "who is") is a public database that lists the registered owner of every internet domain. When you register a domain, the registrar is required to publish certain information about you in the WHOIS database. A WHOIS lookup retrieves that information.
A standard WHOIS record includes:
Some TLDs (like .com, .net) publish all of the above. Others (like .eu, .uk, .bd) publish only limited data. Our tool adapts to each TLD automatically.
There are two reasons you'll see masked or redacted WHOIS data:
Organization name, country, registrar, dates, name servers, and status codes are still published even with privacy on — those are operational data, not personal data.
Yes, 100% free for individual lookups and bulk up to 50 domains per day. No signup required, no credit card, no ads on the results page.
We offer optional paid tiers for power users:
Free users still get unlimited single lookups, 50 bulk lookups/day, and CSV/PDF/JSON export. We make money on paid upgrades, not by gating the core tool.
WHOIS is the original 1982 protocol. It's plain text, served on TCP port 43, and has no standard structure — every registry formats their output differently. Parsing it is a nightmare.
RDAP (Registration Data Access Protocol) is the modern replacement, mandated by ICANN since 2019 for all gTLDs. It returns structured JSON, supports internationalization, supports authentication for tiered access, and is far easier to parse reliably.
Our tool tries RDAP first (faster, structured, more reliable). If a TLD doesn't support RDAP yet (some ccTLDs like .bd), we fall back to classic WHOIS on port 43 and parse the text into structured fields. You always get the same clean result view regardless of which protocol served the data.
Reverse WHOIS is the inverse of a normal lookup: instead of searching by domain to find the owner, you search by owner to find all their domains. You can search by name, email, organization, or even phone number.
How it works under the hood:
Common use cases: brand owners finding cybersquatters, journalists mapping networks of shell companies, investors finding portfolios worth buying, lawyers building UDRP evidence.
The data we show is pulled live from the authoritative registry server — it's as accurate as the registry's own records. However, the accuracy of those records depends on what the domain owner submitted when registering.
ICANN requires registrants to provide accurate contact info and to update it within 7 days of any change. In practice:
If you find a domain with patently false WHOIS data, you can file a WHOIS Inaccuracy Complaint with ICANN directly — we link to the complaint form in every result.
Yes. We maintain a 20+ year historical archive of WHOIS records for over 320 million domains. For any lookup, you can switch to the "History" tab to see:
Historical data is invaluable for: proving bad-faith registration in UDRP disputes, tracking when a competitor rebranded, identifying domain flipping patterns, or just satisfying curiosity about a domain's past. Free users see the last 3 historical snapshots; Pro users see the full history.
EPP status codes (formally called Extensible Provisioning Protocol status codes) are flags the registry sets on a domain to control what operations are allowed. There are about 25 standard codes. Our tool auto-translates them into plain English, but here are the most common:
Click any status pill in a lookup result for a full plain-English explanation.
Yes. .bd / .com.bd / .net.bd / .org.bd / .edu.bd WHOIS is supported. BTCL (Bangladesh Telecommunications Company Limited) operates the .bd registry and we query their WHOIS server directly.
Note: BTCL's WHOIS publishes less data than ICANN-accredited gTLDs. For .bd you'll typically see:
Personal contact details for .bd are not published in WHOIS — you'd need to contact BTCL or the registrar directly for those.
If you have a domain registered with SylhetHost, WHOIS privacy is free and enabled by default on all supported TLDs (.com, .net, .org, .info, .biz, .xyz, .online, .store, .tech, .shop, .me, and 100+ others). No action needed.
If your domain is at another registrar, look for a setting called "WHOIS Privacy", "Domain Privacy", or "Privacy Protection" in their dashboard. Most registrars now offer this free, but a few (notably GoDaddy) still charge extra for it.
For full anonymity, also: (1) keep your domain locked (clientTransferProhibited), (2) use a private email for the registrant contact (we recommend a separate alias), (3) enable 2FA on your registrar account. See our domain registration page for the full privacy checklist.
Free tier: unlimited single lookups, 50 bulk lookups per day, no API. Perfect for personal use, one-off research, and small audits.
Pro tier (490 BDT/month): 1,000 bulk lookups/day, reverse WHOIS with full results, change monitoring alerts, and basic API access (1,000 calls/day). Designed for power users, small agencies, and brand monitors.
Business tier (990 BDT/month): 10,000 bulk lookups/day, full historical archive, full API (10,000 calls/day with structured JSON responses), team seats, priority support. Designed for SEO agencies, cybersecurity firms, and enterprises.
API documentation is available in your account dashboard after upgrading. The API supports both RESTful JSON and GraphQL endpoints, with webhook support for monitoring alerts.
Free, fast, no signup. Run a WHOIS lookup, dive into the structured record, scan the historical archive, and export your findings — all in one place. 3.2M+ lookups served.