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Subdomain Lookup API – Discover All Subdomains of Any Domain

Our Subdomain Lookup API enables you to retrieve a complete list of subdomains associated with any domain, along with detailed visibility into their activity history. Each result includes key data such as when the subdomain was first discovered, when it was last observed, and whether it has become inactive.

Use our subdomain lookup API to monitor the full lifecycle of subdomains with precise timestamp data. This allows you to detect newly exposed assets, identify abandoned endpoints, and maintain clear visibility over both active and historical subdomain activity.

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10K Free Credits, No Credit Card Required

Features

Comprehensive Subdomain Discovery

Retrieve a wide range of subdomains linked to a domain, including publicly exposed and historically observed entries. This allows deeper visibility into the domain’s full asset surface.

Historical Activity Tracking

Every subdomain is enriched with time-based insights, showing when it was initially detected and its most recent activity. This helps you understand how domain assets evolve over time.

Instant Subdomain Count

Quickly assess the scale of a domain’s footprint with a total record count included in the response, giving immediate context without additional processing.

Advanced Filtering Capabilities

Refine your results by focusing on active or inactive subdomains. Use timestamp fields to narrow down data based on lifecycle events or activity periods.

Scheduled Data Refresh Options

Choose how frequently you want updated data, whether real-time monitoring or periodic snapshots, depending on your operational needs.

Continuously Updated Data

Our scanning infrastructure runs continuously to detect new subdomains and changes, ensuring the dataset remains current and reliable.

Exportable Data for Analysis

Download results in CSV format for offline analysis, reporting, or integration into security and analytics workflows.

Multiple Response Formats

Access results in structured formats such as JSON and XML, making it easy to integrate with internal systems, dashboards, or automation pipelines.

Documentation

API Endpoint

GET

https://api.apifreaks.com/v1.0/subdomains/lookup

Test

LANGUAGE

Python

PHP

Java

Node

Ruby

$ pip install requests

Request Parameters

Parameter	Required	Type	Default	Description
domain	Yes	String	-	The domain for which you would like to retrieve subdomains.
before	No	String	current date	Fetch records created before a specific date.
after	No	String	oldest domain record date	Fetch records created after a specific date.
status	No	String	both inactive and active	Two statuses are available: inactive and active. active fetches all active subdomains, and inactive fetches all inactive subdomains.
page	No	String	1	Specify page number to access specific page data.
format	No	String	json	Response format. Possible values are: (1) json (2) xml

API Response

Explore detailed response fields including field names, data types, requirements, and descriptions in the interactive Response Table. For complete response documentation click here.

HTTP Error Codes

HTTP Status	Reasons
400	after date must be earlier than before date.
400	after date cannot be greater than the current date.
400	before date cannot be greater than the current date.

How-To-Guides

Find Subdomains with Domain Name

To find subdomains associated with a domain, provide the domain name along with any optional parameters which you might need to filter out specific subdomains.

curl -X GET "https://api.apifreaks.com/v1.0/subdomains/lookup?domain=google.com&after=2010-2-20&before=2025-05-20&status=active&page=3&apiKey=API-KEY"'

   # Response
{
    "domain": "google.com",
    "status": true,
    "query_time": "2026-04-15T11:32:31.773639591",
    "current_page": 3,
    "total_pages": 180,
    "total_records": 17913,
    "subdomains": [
        {
            "subdomain": "amiuq33.sites.google.com",
            "first_seen": "2024-04-18",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "1f3nc86.sites.google.com",
            "first_seen": "2022-12-02",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "stzrv5h.sites.google.com",
            "first_seen": "2023-10-03",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "wk40p58.sites.google.com",
            "first_seen": "2022-10-01",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "wkn8okb.sites.google.com",
            "first_seen": "2022-09-29",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "wkr2214.sites.google.com",
            "first_seen": "2022-09-29",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "nremzqo.sites.google.com",
            "first_seen": "2023-06-02",
            "last_seen": "2026-03-29"
        },
        {
            "subdomain": "crosbolt.teams.x20web.corp.google.com",
            "first_seen": "2024-03-05",
            "last_seen": "2026-03-22"
        },
        {
            "subdomain": "bbpmkdg.sites.google.com",
            "first_seen": "2023-09-29",
            "last_seen": "2026-02-19"
        },
        {
            "subdomain": "bb9ga10.sites.google.com",
            "first_seen": "2023-10-04",
            "last_seen": "2026-02-19"
        },
        {
            "subdomain": "z0iadwr.sites.google.com",
            "first_seen": "2023-05-30",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "z0xk0n8.sites.google.com",
            "first_seen": "2023-05-29",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "kcr7lhz.sites.google.com",
            "first_seen": "2024-04-17",
            "last_seen": "2026-03-01"
        },
        {
            "subdomain": "hbomax.sites.google.com",
            "first_seen": "2021-09-21",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "udoe35z.sites.google.com",
            "first_seen": "2023-03-30",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "8kxzb2j.sites.google.com",
            "first_seen": "2022-11-28",
            "last_seen": "2026-03-01"
        },
        {
            "subdomain": "uczwmh7.sites.google.com",
            "first_seen": "2023-02-02",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "zr7plvv.sites.google.com",
            "first_seen": "2022-10-04",
            "last_seen": "2026-03-25"
        },
        {
            "subdomain": "uew24n7.sites.google.com",
            "first_seen": "2023-03-25",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "uf7yvuc.sites.google.com",
            "first_seen": "2023-03-24",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9g5hue1.sites.google.com",
            "first_seen": "2022-10-04",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9gsm3wk.sites.google.com",
            "first_seen": "2022-10-05",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9hm0ldm.sites.google.com",
            "first_seen": "2022-09-27",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9ifvht1.sites.google.com",
            "first_seen": "2022-09-26",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9j1ys2b.sites.google.com",
            "first_seen": "2022-09-28",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9j4fd0u.sites.google.com",
            "first_seen": "2022-10-05",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9jviaxt.sites.google.com",
            "first_seen": "2022-09-24",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9k7h9wc.sites.google.com",
            "first_seen": "2022-10-02",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "i6nhcg6.sites.google.com",
            "first_seen": "2022-11-30",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9fr55ew.sites.google.com",
            "first_seen": "2022-09-30",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "4y1htro.sites.google.com",
            "first_seen": "2023-12-01",
            "last_seen": "2026-03-01"
        },
        {
            "subdomain": "ii6lz33.sites.google.com",
            "first_seen": "2023-03-21",
            "last_seen": "2026-02-18"
        },
        {
            "subdomain": "9nwb1mh.sites.google.com",
            "first_seen": "2022-10-07",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9o27c10.sites.google.com",
            "first_seen": "2022-10-06",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9os3qbt.sites.google.com",
            "first_seen": "2022-09-24",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9oysxh4.sites.google.com",
            "first_seen": "2022-09-25",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9qdjby2.sites.google.com",
            "first_seen": "2022-10-03",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9qlzpfo.sites.google.com",
            "first_seen": "2022-09-29",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "ugjor7i.sites.google.com",
            "first_seen": "2023-02-04",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "ugnfpru.sites.google.com",
            "first_seen": "2023-03-27",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "ui2vk3a.sites.google.com",
            "first_seen": "2023-02-05",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "keq1klx.sites.google.com",
            "first_seen": "2024-02-22",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "zcinv5s.sites.google.com",
            "first_seen": "2023-01-27",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "9kioaoh.sites.google.com",
            "first_seen": "2022-09-29",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9kslg32.sites.google.com",
            "first_seen": "2022-09-29",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9lvs3d5.sites.google.com",
            "first_seen": "2022-10-05",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9lx7afe.sites.google.com",
            "first_seen": "2022-09-27",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9n5epb8.sites.google.com",
            "first_seen": "2022-10-07",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9spctc7.sites.google.com",
            "first_seen": "2022-09-27",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9tkyy8m.sites.google.com",
            "first_seen": "2022-09-28",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9tv6opm.sites.google.com",
            "first_seen": "2022-10-06",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "uj90t5v.sites.google.com",
            "first_seen": "2023-03-28",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "ujg2t9g.sites.google.com",
            "first_seen": "2023-03-23",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "1ls58ye.sites.google.com",
            "first_seen": "2022-07-01",
            "last_seen": "2026-03-01"
        },
        {
            "subdomain": "6fj.spreadsheets.google.com",
            "first_seen": "2020-06-05",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "no4ty69.sites.google.com",
            "first_seen": "2024-04-13",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "zqdrdoo.sites.google.com",
            "first_seen": "2023-03-23",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "2yknrki.sites.google.com",
            "first_seen": "2023-02-01",
            "last_seen": "2026-02-20"
        },
        {
            "subdomain": "7tf3172.sites.google.com",
            "first_seen": "2023-12-02",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "7vkrx8o.sites.google.com",
            "first_seen": "2023-12-08",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "7w0g0ky.sites.google.com",
            "first_seen": "2023-12-03",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "845ol1q.sites.google.com",
            "first_seen": "2023-03-23",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "16flsco.sites.google.com",
            "first_seen": "2023-03-28",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "331u0co.sites.google.com",
            "first_seen": "2023-02-03",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "9w30bpz.sites.google.com",
            "first_seen": "2022-09-28",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9wd4csv.sites.google.com",
            "first_seen": "2022-10-07",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "9wizgco.sites.google.com",
            "first_seen": "2022-10-01",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "uqgtytd.sites.google.com",
            "first_seen": "2023-09-29",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "5t5bnzj.sites.google.com",
            "first_seen": "2023-02-05",
            "last_seen": "2026-03-29"
        },
        {
            "subdomain": "w5f9n8e.sites.google.com",
            "first_seen": "2022-11-30",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "105fib1.sites.google.com",
            "first_seen": "2023-03-26",
            "last_seen": "2026-03-04"
        },
        {
            "subdomain": "www10.google.com",
            "first_seen": "2017-07-24",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "erir438.sites.google.com",
            "first_seen": "2022-12-05",
            "last_seen": "2026-03-21"
        },
        {
            "subdomain": "omegle.sites.google.com",
            "first_seen": "2021-09-26",
            "last_seen": "2026-02-20"
        },
        {
            "subdomain": "14jy5k1.sites.google.com",
            "first_seen": "2022-12-09",
            "last_seen": "2026-03-18"
        },
        {
            "subdomain": "14nyylj.sites.google.com",
            "first_seen": "2022-12-04",
            "last_seen": "2026-03-18"
        },
        {
            "subdomain": "14v7ka8.sites.google.com",
            "first_seen": "2022-12-03",
            "last_seen": "2026-03-18"
        },
        {
            "subdomain": "overview.sites.google.com",
            "first_seen": "2023-06-03",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "vbmayge.sites.google.com",
            "first_seen": "2023-06-07",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "daok13g.sites.google.com",
            "first_seen": "2023-06-10",
            "last_seen": "2026-02-22"
        },
        {
            "subdomain": "14wz38p.sites.google.com",
            "first_seen": "2022-12-05",
            "last_seen": "2026-03-18"
        },
        {
            "subdomain": "u0febcb.sites.google.com",
            "first_seen": "2022-12-05",
            "last_seen": "2026-03-29"
        },
        {
            "subdomain": "vbowhh3.sites.google.com",
            "first_seen": "2023-06-07",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "v294zar.sites.google.com",
            "first_seen": "2023-05-28",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "yorshzr.sites.google.com",
            "first_seen": "2023-06-02",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "v2e12wr.sites.google.com",
            "first_seen": "2023-05-29",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "3.chart.apis.google.com",
            "first_seen": "2019-07-21",
            "last_seen": "2026-03-25"
        },
        {
            "subdomain": "3.client-channel.google.com",
            "first_seen": "2019-07-19",
            "last_seen": "2026-03-25"
        },
        {
            "subdomain": "v2iba0t.sites.google.com",
            "first_seen": "2023-05-28",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "v2o77d8.sites.google.com",
            "first_seen": "2023-05-29",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "de1dqtw.sites.google.com",
            "first_seen": "2023-09-22",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "clum7ic.sites.google.com",
            "first_seen": "2022-11-29",
            "last_seen": "2026-03-04"
        },
        {
            "subdomain": "765iodu.sites.google.com",
            "first_seen": "2023-10-02",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "j2zxizx.sites.google.com",
            "first_seen": "2023-05-30",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "p77jw4r.sites.google.com",
            "first_seen": "2022-12-05",
            "last_seen": "2026-02-23"
        },
        {
            "subdomain": "utuvtsr.sites.google.com",
            "first_seen": "2023-09-27",
            "last_seen": "2026-03-18"
        },
        {
            "subdomain": "eh8.spreadsheets.google.com",
            "first_seen": "2017-04-26",
            "last_seen": "2026-02-20"
        },
        {
            "subdomain": "264xp86.sites.google.com",
            "first_seen": "2022-11-30",
            "last_seen": "2026-02-21"
        },
        {
            "subdomain": "6oho0b6.sites.google.com",
            "first_seen": "2023-10-04",
            "last_seen": "2026-03-04"
        },
        {
            "subdomain": "qfasnnb.sites.google.com",
            "first_seen": "2023-03-23",
            "last_seen": "2026-02-23"
        }
    ]
}

Pricing

To use the Subdomain Lookup API, you will need API credits. We only charge for successful queries, defined by a 2xx status code. If your request results in a 4xx or 5xx status code, no credits will be charged, and any deducted credits will be returned.

For each successful request, 35 credits are charged.

Utilize the Credits Usage API to efficiently monitor your recent consumption of both one-off and subscription credits. This API provides a streamlined way to track and manage your credit usage, ensuring you stay informed about your remaining balance and can optimize your resource allocation effectively.

Price Estimation Calculator

FAQs

A Subdomain Lookup API not only lists subdomains but also delivers structured data such as discovery dates and activity status.

It provides complete visibility into all subdomains linked to a domain, allowing you to track new additions, identify unused assets, and maintain better control over your infrastructure without manual checks.

Subdomains change over time. By knowing when a subdomain first appeared or became inactive, you can detect unexpected changes, investigate anomalies, and avoid leaving outdated endpoints exposed.

Yes. It helps find hidden subdomains that may be vulnerable. Identifying inactive or unmonitored assets reduces the risk of misuse, takeover, or misconfiguration.

The API delivers structured data that can be integrated into monitoring systems, security pipelines, or analytics tools, making it easy to process and act on subdomain data at scale.