WhoisXML API Alternatives 2026 — Domains & WHOIS

Enterno.io Editorial Team

WhoisXML API Alternatives

By Anatoly Oshmanovsky · Updated Apr 17, 2026

Key idea:

WhoisXML API (whoisxmlapi.com) is a commercial WHOIS + subdomain + DNS + threat-intelligence provider since 2005. Min plan $49/mo. Alternatives: Enterno.io WHOIS (free, no key), whoapi.com, Domaintools (enterprise), Jsonwhoisapi. For simple lookups without a monthly fee — Enterno.io. For deep threat intelligence + historical snapshots — only paid WhoisXML.

Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.

Try it now — free →

About the Competitor

WhoisXML API since 2005. Formerly WhoisAPI Inc. Coverage: 600+ TLDs, historical snapshots since 2005, threat intelligence, DNS, subdomain enumeration. Pro plans: $49-$2,500/mo by volume.

Enterno.io vs Competitor — Feature Comparison

Feature	Enterno.io	Competitor
Free WHOIS lookup	✅	100 req/day
Historical WHOIS	❌	✅ Paid
Subdomain enumeration	✅	✅ Paid
Threat intelligence	⚠️	✅
TLD coverage	300+	600+
Russian ccTLDs (.ru/.рф/.su)	✅ full	⚠️ basic
Ruble billing	✅	❌
Min price	₽0-490	$49/mo

When to Pick Enterno.io

Russian-language support + ruble billing
Just WHOIS without a monthly fee
Working with .ru/.рф/.su — Enterno goes deeper via ccTLD registries
Need 15-year historical WHOIS — only WhoisXML has it

Domain RegistrarFind out which registrar registered the domain and where DNS is managed.

Expiration DateCheck domain expiration date to prevent it from expiring and being lost.

Domain StatusWHOIS shows EPP statuses: clientTransferProhibited, serverHold and others.

Owner DataContact details of registrant, admin and tech contacts (when privacy is off).

Why teams trust us

250+

TLDs supported

Expiry

domain expiry date

<3s

result

Alerts

before domain expiry

How it works

Enter domain

WHOIS query to registrar

Registrar, dates & contacts

WHOIS: everything about a domain in seconds

WHOIS lookup reveals the full domain registration history: owner, dates, registrar, nameservers, and status. An essential tool for competitor analysis, legal verification, and expiration monitoring.

Full WHOIS Record

All registrant fields: name, organization, email, phone, address (if not hidden by privacy).

Key Dates

Created, Updated, Expires — exact domain lifecycle dates in one click.

Nameservers

List of NS servers to understand where DNS is hosted and whether CDN is used.

Status & Locks

EPP statuses show whether the domain is protected from transfer, deletion, or changes.

Who uses this

DevOps

domain expiry control

SEO

domain age & history

Security

domain owner verification

Marketers

expiring domain acquisition

Common Mistakes

❌

Not checking expiration proximityDomains expire automatically. Without monitoring you lose the domain, which may end up with a competitor.

❌

Taking WHOIS data as ground truthMany registrars offer WHOIS privacy — real owner data may be hidden behind a proxy service.

❌

Ignoring clientTransferProhibited statusWithout this status a domain can be transferred without the owner's knowledge. Enable protection at your registrar.

❌

Not checking NS after hosting migrationAfter server migration NS records need to be updated. WHOIS will show old values until propagation.

Best Practices

✓

Monitor expiration dateSet up automatic renewal or create a reminder 60 days before domain expiration.

✓

Enable WHOIS privacyHide personal data through WHOIS Guard or a similar service offered by your registrar.

✓

Check competitorsWHOIS of a competing domain reveals the registrar, domain history, and potential partners.

✓

Cross-check NS with DNS checkerUse DNS check alongside WHOIS for the full picture — NS and the actual zone must match.

Get more with a free account

WHOIS domain expiry monitoring and alerts well before expiration date.

Learn more

Alternatives

WhoisXML API Alternatives

Frequently Asked Questions

Main difference?

WhoisXML = enterprise tier with 20-year archive. Enterno.io = quick daily WHOIS with no monthly fee.

Does Enterno have historical WHOIS?

No. We show current state from authoritative WHOIS servers. For 2010 snapshots you need WhoisXML archive.

Is Domaintools another option?

Yes. Enterprise provider. More expensive ($99+/mo) but better UI for investigators.

How do I check WHOIS myself?

<a href="/en/whois">Enterno WHOIS</a> — enter domain, get registrar, expiration, nameservers. No signup.