Best bulk WHOIS lookup tools (2026)
Quick answer: Without an account, SimpleVerifier's bulk WHOIS lookup takes up to 500 unique domains a run and Abacktools takes 20, both reading RDAP. ICANN Lookup, Whois.com and who.is look up one domain at a time. For very large jobs, WhoisXML API takes up to 500,000 domains a query and Apify actors run thousands, both with an account and billed by volume.
By SimpleVerifier Team · Last updated · Prices and limits checked on each vendor’s own site
Side by side
Ranked by the most domains one run looks up without creating an account; tools that need an account score 0.
| # | Tool | Domains per run, no account | Free limit | Bulk limit | Price | Signup needed | Best for |
|---|---|---|---|---|---|---|---|
| 1 | SimpleVerifier bulk WHOIS lookup | 500 | 5,000 rows and 500 unique domains a run | 500 unique domains a run; 1,000 domains per ten minutes per connection | Free tool (paid plans are for email verification) | No | Registrar, dates, status, nameservers and DNSSEC for a list, as CSV |
| 2 | Abacktools Bulk WHOIS Lookup | 20 | Up to 20 domains a lookup | 20 domains | Free | No | Short lists, in the browser |
| 3 | ICANN Lookup | 1 | One domain a lookup | 1 domain | Free | No | The authoritative record for one domain |
| 4 | Whois.com | 1 | One domain a lookup | 1 domain | Free | No | One domain's raw WHOIS record |
| 5 | who.is | 1 | One domain a lookup | 1 domain on the website | Free lookups; API has a free tier, then paid | No for lookups; yes for the API | WHOIS plus DNS and certificate history through an API |
| 6 | WhoisXML API Bulk WHOIS | 0 | 500 free API queries after signup | Up to 500,000 domains a query | 1 credit per domain; 2,000 queries for $50 | Yes (WhoisXML API account) | Very large lists and historical WHOIS |
| 7 | Apify: Bulk WHOIS Lookup (logiover) | 0 | Apify's free plan includes $5 a month of usage | Thousands a run; no hard cap published | From $3.50 per 1,000 results | Yes (Apify account) | Scheduled RDAP lookups through an API |
How we compared
We read each tool's own page on 19 October 2026 for per-run limits, signup and price. Most registries now answer through RDAP, the standard that replaces WHOIS, and most owner details are redacted for privacy, so we compared registrar, dates, status and nameservers rather than owner contacts.
Each tool in a few lines
1. SimpleVerifier bulk WHOIS lookup(our tool)
Best for: Registrar, dates, status, nameservers and DNSSEC for a list, as CSV
- Queries each TLD's own RDAP registry, 20 domains at a time
- Registrar, registered, updated and expiry dates, status, nameservers and DNSSEC per row, with CSV download
- Watch out: While a sign-in test runs, some visitors are asked to sign in (free, with Google) after 25 rows; everyone else gets the full run without an account.
- Watch out: No owner contact data, which most registries redact anyway
Checked October 19, 2026: SimpleVerifier: Bulk WHOIS lookup
2. Abacktools Bulk WHOIS Lookup
Best for: Short lists, in the browser
- No signup and no stated usage limit
- Reads registry RDAP endpoints for registrar, dates, nameservers and status
- Watch out: 20 domains a lookup
Checked October 19, 2026: Abacktools: Bulk WHOIS Lookup
3. ICANN Lookup
Best for: The authoritative record for one domain
- Run by ICANN, straight from the registry's RDAP service
- Points to ICANN's request service for nonpublic data
- Watch out: One domain at a time
Checked October 19, 2026: ICANN Lookup (registration data lookup tool)
4. Whois.com
Best for: One domain's raw WHOIS record
- Shows the full registrar and registrant record as published
- Watch out: One domain at a time; may show a security check before results
Checked October 19, 2026: Whois.com: Whois Lookup
5. who.is
Best for: WHOIS plus DNS and certificate history through an API
- API returns parsed WHOIS, normalised RDAP and DNS and TLS history as JSON
- Watch out: One domain at a time on the website
Checked October 19, 2026: who.is
6. WhoisXML API Bulk WHOIS
Best for: Very large lists and historical WHOIS
- Up to 500,000 domains in one query
- Large WHOIS database with history products alongside
- Watch out: Account needed; each domain costs a credit after the free 500
Checked October 19, 2026: WhoisXML API: Bulk WHOIS Lookup · WhoisXML API: Bulk WHOIS API · WhoisXML API: WHOIS API pricing
7. Apify: Bulk WHOIS Lookup (logiover)
Best for: Scheduled RDAP lookups through an API
- RDAP lookups for thousands of domains per run, JSON or CSV output
- Watch out: Pay per result on an Apify account
Checked October 19, 2026: Apify Store: Bulk WHOIS Lookup (logiover) · Apify: Pricing
Common questions
- What is a bulk WHOIS lookup?
- It looks up the registration record of many domains at once: registrar, creation, update and expiry dates, status codes and nameservers. Modern tools read RDAP, the JSON successor to WHOIS that registries now run.
- Can I do a bulk WHOIS lookup without signing up?
- Yes. SimpleVerifier takes up to 500 unique domains a run and Abacktools 20, both without an account. WhoisXML API and Apify actors need an account and charge per domain past their free allowance.
- Why is the registrant name missing?
- Since GDPR, most registries and registrars redact registrant contact details from public WHOIS and RDAP. The registrar, dates and status are still public; ICANN runs a request service for nonpublic data.
- What is the difference between WHOIS and RDAP?
- WHOIS is the old free-text protocol on port 43. RDAP returns structured JSON over HTTPS, so fields like expiry date parse reliably. ICANN-accredited gTLD registries are required to run RDAP.
- How do I check when a list of domains expires?
- Run them through a bulk WHOIS or bulk expiry checker; both read the expiry date from the registry. SimpleVerifier also has a bulk domain expiry checker that sorts by days left.