WHOIS-Abfrage
Registrierungsdaten — jede TLD, bis zu 20 auf einmal
Frage die Registrierung einer Domain ab — Registrar, Erstellungs- und Ablaufdaten, Status und Nameserver — für praktisch jede TLD. Angetrieben von modernem RDAP mit WHOIS-Fallback, und du kannst bis zu 20 Domains auf einmal prüfen.
So liest du das Ergebnis
- 1.Gib eine Domain ein, oder füge bis zu 20 ein (eine pro Zeile), um sie in Tabs zu vergleichen.
- 2.Das Ablaufdatum ist farblich kodiert — grün, wenn komfortabel, amber innerhalb von 30 Tagen, rot, wenn bereits abgelaufen — damit auslaufende Domains sofort ins Auge fallen.
- 3.Persönliche Kontaktdaten sind bei den meisten Registraren ausgeblendet (DSGVO und Datenschutzdienste); Registrar, Daten, Status und Nameserver bleiben öffentlich.
Warum es wichtig ist
WHOIS beantwortet die grundlegenden Fragen zu einer Domain — wer sie registriert hat, wie alt sie ist und wann sie abläuft. Batch-Abfragen machen es einfach, ein ganzes Portfolio auf einmal zu prüfen.
Häufige Fragen
Welche TLDs werden unterstützt?
Praktisch alle. Wir nutzen das IANA-RDAP-Bootstrap für jede gTLD und viele ccTLDs und greifen für den Rest auf Port-43-WHOIS zurück, sodass die Abdeckung umfassend ist.
Warum sind Kontaktdaten verborgen?
Die meisten Registrare schwärzen persönliche Kontaktdaten aus Datenschutzgründen (DSGVO und WHOIS-Datenschutzdienste). Registrar, Daten, Status und Nameserver bleiben öffentlich.
What is a WHOIS lookup?
A WHOIS lookup is the standard way to read the public registration record behind any domain name. Every domain — whether it ends in .com, .net, .org, a country code like .co.uk, or one of the newer extensions — has a record held by its registry that says who the registrar is, when the domain was first registered, when it was last changed, when it expires, and which nameservers currently answer for it. Running a domain WHOIS turns that record into a clear, readable summary in seconds.
People use WHOIS to vet an unfamiliar company or seller before trusting them, to investigate a suspicious or phishing domain, to keep their own portfolio from lapsing, and to check whether a name they want is still free to register. This tool queries live registry data on demand, so what you see reflects the domain’s real state right now.
WHOIS record fields, explained
- Domain
- The name being looked up, normalised to its registrable form.
- Registrar
- The ICANN-accredited company the domain is registered through — where it is renewed or transferred.
- Registrant
- The domain owner. Usually redacted for privacy under GDPR and WHOIS privacy services.
- Created
- The date the domain was first registered — a rough proxy for its age and reputation.
- Updated
- The last time the registration record changed (renewal, nameserver edit, status change).
- Expires
- When the current registration term ends. Renew before this date or the domain can lapse.
- Status
- EPP status codes set by the registry/registrar — locks, holds and lifecycle states (see below).
- Name servers
- The authoritative DNS servers that answer for the domain — where its DNS is actually hosted.
Common domain status codes
Registries publish a domain’s state as EPP status codes. The ones you will see most often:
ok / activeThe domain is active with no special restrictions.clientTransferProhibitedA registrar lock that blocks transfers to another registrar — normal and protective.clientUpdateProhibitedChanges to the domain record are locked at the registrar.clientHold / serverHoldThe domain is removed from DNS and will not resolve until the hold is lifted.autoRenewPeriodThe domain was recently auto-renewed; a grace window applies.redemptionPeriodThe domain expired and can still be restored by the former owner for a fee.pendingDeleteThe redemption window passed; the domain is about to be released for public registration.inactiveNo nameservers are set, so the domain does not resolve yet.
RDAP vs. classic WHOIS
RDAP (Registration Data Access Protocol) is the modern, JSON-based successor to legacy text WHOIS. It returns consistent, structured fields and standardised status codes, and it is what most registries now serve. This tool prefers RDAP for accuracy and only falls back to classic port-43 WHOIS for the TLDs that have not adopted it yet — the source badge on each result tells you which was used.
Is the domain available?
If a lookup finds no active registration, the result appears as a green “Available” card — the domain looks unregistered and free to claim. That is a strong signal, but final availability is always confirmed at a registrar’s checkout, because a name can be reserved, premium-priced, or sitting in a grace period. When a domain is available, the card offers a suggested next step to register it.