Bulk domain checker, 200 names at once.
Paste a list of names and see which are free to register, checked live, with a CSV to take away.
Up to 200 names a run. DNS is asked from your browser; Hivex asks the registry only for the rest, and stores nothing.
Pasting a list.
- One name per line, or separated by commas or spaces. Addresses such as https://www.example.com/page are cut down to the name.
- A name with an extension is checked as it is. A name without one gets each extension you pick, so a list of ideas becomes a grid.
- Duplicates are dropped, and names no registry could accept (a hyphen at the end, a one-letter .si) are marked right away.
How each name is checked.
Your browser asks DNS for every name first: one with name servers is registered, and that settles most taken names in a second. The rest go to Hivex in groups of 25, and Hivex asks each registry (RDAP, or WHOIS where there is no RDAP). The same rules as the domain availability checker apply: free means no record at the registry, and a premium or reserved name only shows up at the registrar's checkout.
Large lists.
Registries limit how fast anyone may ask them, so Hivex does too: a long list may pause for a moment, then carry on by itself. For more than 200 names, split the list and run it again.
Questions people ask.
How many domains can I check at once?
Up to 200 names a run. Paste full names, or base names and pick the extensions they should get: 20 names on 10 extensions make 200 checks.
How does the bulk checker know a name is free?
Your browser asks DNS first; a name with name servers is registered. For the rest, Hivex asks the registry itself, through RDAP or WHOIS, and each row says which one answered.
Can I download the results?
Yes, as a CSV with each name, its status and how it was checked. The file is made in your browser.
Are the names I check saved or shared?
No. The list stays in your browser; the names DNS cannot settle go to Hivex only to ask the registry, and are not stored.
Why are some names unknown?
A few registries offer no public lookup, and a registry can be busy for a moment. Unknown means Hivex could not confirm it, not that the name is free.
Hivex index
Short names, still free to register.
Starting something new? Hivex keeps a live index of short, brandable .si names nobody has claimed yet, each checked with the registry.
From code, or an AI assistant.
The same lookup is a free JSON API, with no key and open CORS, and a tool any AI assistant that speaks MCP can call.
curl "https://hivex.si/api/v1/tools/availability?domain=example.com"More Domain tools
- Domain availability checkerIs a name free? Live from the registry, on any extension.
- Brand name checkerOne name: 8 domain extensions and 10 platforms.
- Username checkerA username on 10 developer and social platforms.
- Domain name generatorIdeas from your words, each one checked free.
- Typosquatting checkerLookalikes of a domain: registered, taking mail, or free.
- Domain history checkerArchive captures by month, and signs of past owners.
- Is this domain for sale?Marketplace, parking and for-sale signs, and how to buy.
- Transfer date calculatorWhen a domain can move registrars, and what blocks it.
- Punycode converterUnicode to xn-- and back, with lookalike warnings.
- WHOIS lookupRegistrar, dates, status locks and name servers, from the registry.
- Domain age checkerExact age from the registration date, plus the last change and transfer.
- Domain expiration checkerExpiry date, days left, and what happens if it lapses.
- Registrar lookupThe registrar, its IANA ID and abuse contact, and the transfer lock.
- Name strength checkerScore a name, and see where its misspellings lead.
- Domain hack generatorWords spelled across the dot, like fami.ly.
- Business name generatorNames for your business, each with a free .com.
- Short domain finder4 and 5 letter names you can still register.
- Dropped .si names.si names that just became free again.
- AI domain name generatorAI name ideas from a description, with a free .com.
- Domain value checkerWhat a name's value rests on, scored and explained.
- TLD lookupWho runs an extension, since when, and how.
- .si price comparisonWhat .si costs at each registrar, over the years.
- Domain prices by extensionFirst year, renewal and 5-year cost of any extension.
- Domain checkerIs a name free to register? Checked live on any extension.
Sources
- RFC 9224: Finding the authoritative RDAP service
- RFC 3912: The WHOIS protocol
- IANA: RDAP bootstrap file for domain names
By Hivex. Updated 10 October 2026. Records are built on the page; nothing you type is saved.