# WHOIS History

Returns the historical WHOIS records of a domain: every distinct registration record Deepinfo has observed, with the dates it was seen.

Source: https://docs.deepinfo.com/reference/lookup/whois-history/

Last updated: 2026-09-27

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`GET https://api.deepinfo.com/v1/analyze/whois-history`

Returns the **historical** WHOIS records of a domain: every distinct registration record Deepinfo has observed, with the dates it was seen. Use it to track ownership, registrar and name server changes.

## Authentication

Send your API key in the `apikey` request header.

## Query Parameters

| Parameter | Required | Description | Example |
|---|---|---|---|
| `domain` | Required | Domain name, e.g. `deepinfo.com`. | `deepinfo.com` |

## Response Fields

An array. Each item is one distinct WHOIS record:

| Field | Description |
|---|---|
| `whois` | The record, with the `whois.*` fields below |
| `whois.check_date` | Check date of the record (UTC) |
| `whois.create_date` | Registration date |
| `whois.update_date` | Date of the last update |
| `whois.expiry_date` | Expiry date |
| `whois.registrar` | Registrar |
| `whois.registrant.name` | Registrant name |
| `whois.registrant.organization` | Registrant organization |
| `whois.registrant.street` | Registrant street address |
| `whois.registrant.city` | Registrant city |
| `whois.registrant.state` | Registrant state or province |
| `whois.registrant.postal_code` | Registrant postal code |
| `whois.registrant.country` | Registrant country |
| `whois.registrant.phone` | Registrant phone number |
| `whois.registrant.email` | Registrant e-mail address |
| `whois.name_servers` | Name servers |
| `whois.domain_status` | Domain status codes |
| `whois.whois_server` | WHOIS server |
| `check_dates` | Every time (UTC) this exact record was observed |

## Errors

`400` if `domain` is not a valid domain.

## Worked Examples

Worked examples of this endpoint, each on its own page with the exact request and its response: [WHOIS History Examples](/reference/lookup/whois-history/examples/).

- [WHOIS History of deepinfo.com](/reference/lookup/whois-history/examples/deepinfo/): The WHOIS history of deepinfo.com: 18 versions of its record, with renewals and a privacy-service registrant.
- [Registrant Renamed: Google Inc. to Google LLC](/reference/lookup/whois-history/examples/google/): The WHOIS history of google.com: six versions, with the registrant organization changing from Google Inc. to Google LLC.
- [Name Server Changes in WHOIS History](/reference/lookup/whois-history/examples/github/): The WHOIS history of github.com: 14 versions; in mid-2020 its name servers moved from AWS and Dyn to AWS and NS1.