New Live RDAP lookups on demand

Domain intelligence, straight from the source.

Over 250 million domains across more than 1,000 TLDs, read from the registries’ own zone files every day and enriched with RDAP. One clean API for lookups, history and search.

Get an API key Read the docs

Every field on every plan Familiar field names Priced by lookups

Zone files read today1,000+ TLDs

Active domains250M+

Lookupexample.com · 200 OK

GET api.whoistoolkit.com/v1/domains/example.com

Endpoints

Domain lookup GET

Search domains GET

Bulk lookup POST

Nameservers GET

Account balance GET

{
  "domainName": "example.com",
  "createdDate": "1995-08-14T04:00:00",
  "expiresDate": "2026-08-13T04:00:00",
  "registrarName": "RESERVED-Internet Assigned Numbers Authority",
  "dnssecSigned": true,
  "nameServers": { "hostNames": [
    "elliott.ns.cloudflare.com",
    "hera.ns.cloudflare.com"
  ] },
  "privacyProtected": false,
  "fetchedAt": "2026-02-09T16:18:05"
}

example.comDNSSEC signed

Registered

14 Aug 1995

Expires

13 Aug 2026

Registrar

IANA (reserved)

DNS

Cloudflare

Registration term31 years

.com.net.org.xyz.top.info.shop.online.store.vip.site.app.biz.bond.pro.io.ai.dev.co.tech.cloud.art

250M+

Active domains tracked

1,000+

TLDs read every day

Daily

Zone file refresh

Record shape for every TLD

Product

Everything a domain record can tell you

Registrar, dates, status, nameservers, DNSSEC, contacts and privacy flags, kept current and kept in history.

One lookup, one clean record

Registries nest their data differently. We flatten it into the same named fields for every TLD, and fetch live if we haven’t seen the domain recently.

curl "https://api.whoistoolkit.com/v1/domains/example.com?apiKey=…"

Daily zone diffs

New and dropped domains, every morning.

+ copperlinestudio.com

− oldharborgoods.com

+ fernwaydental.com

+ quietmilecoffee.shop

Reverse search

Every domain on a nameserver, organization or email.

History

What a record looked like on any date.

2024snapshot

2025snapshot

todaylive

Privacy, flagged

Redacted contacts are marked as privacy protected.

Registrant

CountryLT

privacyProtected: true

Bulk lookups

Send a list of domains in one request and get every record back.

acme.com200 OK

globex.io200 OK

initech.net200 OK

umbrella.shop200 OK

Fields your code already expects

Field names follow the shape most WHOIS integrations already use, so switching from another provider is mostly a change of base URL.

domainName  createdDate  expiresDate
registrarName  registrant  nameServers

How it works

From registry to your app in three steps

We read the zone files

Every registry’s full domain list, downloaded daily through ICANN’s Centralized Zone Data Service.

1,000+ zones · daily

We enrich with RDAP

Registry and registrar RDAP servers queried for dates, status and contacts, then parsed into proper fields.

registry + registrar

You query one API

Lookups, history, search and bulk, in one JSON shape. Missing a domain? We fetch it live.

GET /v1/domains/…

Use cases

Built for the people who ask “who’s behind this domain?”

See every domain registered against your company.

Search by registrant email or organization
Spot lookalikes on new TLDs
Registrar and nameservers ready for a takedown request

GET /v1/domains?org=Your+Brand+Inc

{ "count": 214, "domains": [
  { "domainName": "yourbrand-login.shop", ... },
  { "domainName": "yourbrand.vip", ... }
] }

Example request and an abbreviated, illustrative response.

From our data

1 in 3

.shop, .store and .top domains we’ve seen in the zone have already dropped out. For .com it’s about 1 in 8.

.top35%

.store35%

.shop33%

.online30%

.xyz18%

.com12%

Share of domains seen in each zone that are absent from the latest one. Snapshot of 29 Oct 2026.

Start looking up domains today

Tell us your volume and we’ll send a price. You can start testing with a key the same day.

Get an API key Read the docs