# FernTool, free: IP company lookup API

> Validate any IPv4/IPv6 + country, ASN, network (IP Geolocation by DB-IP, CC BY 4.0, IPtoASN)

FernTool's Free plan for the IP company lookup API costs $0.00 per 1,000 IP addresses. We check each provider's docs for 10 fields. FernTool's docs list 2: Owner's name, ASN.
FernTool limits how many calls you get but gives no number.
We ran FernTool in [our IP company lookup API benchmark](https://datacircle.dev/best-ip-company-lookup-api.txt). We didn't score any FernTool plan.
We rank 530 plans for IP company lookup APIs by price. Half the plans cost $0.239 or less per 1,000 IP addresses. This plan and 39 others tie for the lowest price per 1,000 IP addresses of the 530 plans. [See the best free IP company lookup API plan.](https://datacircle.dev/best-ip-company-lookup-api.txt)
[Api.co.id's Rp99,000 (about $5) monthly plan](https://datacircle.dev/ip-company-lookup-apis/api-co-id/rp99000-monthly/llms.txt) covers any number of IP addresses. Api.co.id's Rp99,000 (about $5) monthly plan costs less up front than IPHunter's €99.99 monthly plan.
[IPKit](https://datacircle.dev/ip-company-lookup-apis/ipkit/free/llms.txt), [thenetworkery](https://datacircle.dev/ip-company-lookup-apis/thenetworkery/free/llms.txt) and [DC5 WHOIS](https://datacircle.dev/ip-company-lookup-apis/dc5-whois/free-public-instance-get-api-v1-lookup/llms.txt) are the best IP company lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/ip-company-lookup-apis/ferntool/free
- [IP company lookup API in 2026: the best of 60+ compared](https://datacircle.dev/best-ip-company-lookup-api.txt)
- Get it: https://www.ferntool.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Request: `GET https://www.ferntool.com/api/ip/{ip}`
- API key: not needed
- Its API docs: https://www.ferntool.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Sold by: FernTool (https://www.ferntool.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 20%
- Owner's name: ✓
- ASN: ✓

## Price

- $ per 1,000 IP addresses: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Validate any IPv4/IPv6 + country, ASN, network (IP Geolocation by DB-IP, CC BY 4.0, IPtoASN)

## Data

- Keep data: no limit
- Use data: Do not abuse the API (automated heavy use may be rate limited). Do not use the service for unlawful purposes. IP Geolocation by DB-IP (https://db-ip.com), CC BY 4.0, ASN data from IPtoASN (https://iptoasn.com), PDDL

## Plan

- Pay: $0

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: ip
- Method: GET
- Path: /api/ip/{ip}

## About the plan

- Plan: Free
- Who can get it: anyone

## The 3 fields the plan's answer can hold

IP address, network owner, ASN

## FernTool's plans (1)

- [FernTool, free](https://datacircle.dev/ip-company-lookup-apis/ferntool/free/llms.txt): $0.00 per 1,000, 20% complete

## FernTool's calls for this API (1)

- `GET /api/ip/{ip}`: [FernTool, free](https://datacircle.dev/ip-company-lookup-apis/ferntool/free/llms.txt)

## FernTool's APIs (2)

- [FernTool: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/ferntool/free/llms.txt)
- [FernTool: IP company lookup API pricing, 1 plan](https://datacircle.dev/ip-company-lookup-apis/ferntool/free/llms.txt)

## FernTool: IP company lookup API alternatives

- [IPKit, free](https://datacircle.dev/ip-company-lookup-apis/ipkit/free/llms.txt): $0.00 per 1,000, 80% complete, 1 day
- [thenetworkery, free](https://datacircle.dev/ip-company-lookup-apis/thenetworkery/free/llms.txt): $0.00 per 1,000, 40% complete
- [DC5 WHOIS, free, Public instance, GET /api/v1/ip](https://datacircle.dev/ip-company-lookup-apis/dc5-whois/free-public-instance-get-api-v1-ip/llms.txt): $0.00 per 1,000, 40% complete
- [MxToolbox, free, GET /api/v1/Lookup/asn/](https://datacircle.dev/ip-company-lookup-apis/mxtoolbox/free-get-api-v1-lookup-asn/llms.txt): $0.00 per 1,000, 20% complete
- [DNSlytics, free](https://datacircle.dev/ip-company-lookup-apis/dnslytics/free/llms.txt): $0.00 per 1,000, 30% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://www.ferntool.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://www.ferntool.com/api/ip/8.8.8.8?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://www.ferntool.com/ip-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://www.ferntool.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://www.ferntool.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing