# WhoisRequest, free: IP company lookup API

> An IP-to-ASN lookup maps a public address to the autonomous-system and network context reported by the lookup source, it does not identify an individual user.

WhoisRequest'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. WhoisRequest's docs list 4: Owner's name, ASN, Network range, Country.
WhoisRequest limits how many calls you get but gives no number.
In [our IP company lookup API benchmark](https://datacircle.dev/best-ip-company-lookup-api.txt), this plan scores 88.9 out of 100. WhoisRequest ranks 4th of 77 providers.
We rank 611 plans for IP company lookup APIs by price. Half the plans cost $0.185 or less per 1,000 IP addresses. This plan and 52 others tie for the lowest price per 1,000 IP addresses of the 611 plans. [199 IP company lookup API plans on our price sheet are free.](https://datacircle.dev/best-ip-company-lookup-api.txt) [IPKit's free plan](https://datacircle.dev/ip-company-lookup-apis/ipkit/free/llms.txt) scores highest of the free plans in our benchmark, at 94.1 out of 100.
[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/whoisrequest/free
- [IP company lookup API in 2026: the best of 70+ compared](https://datacircle.dev/best-ip-company-lookup-api.txt)
- Get it: https://whoisrequest.org/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Request: `GET https://whoisrequest.org/api/v1/lookup/asn-lookup/{IPv4 or IPv6 address}`
- API key: not needed
- Its API docs: https://whoisrequest.org/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Sold by: WhoisRequest (https://whoisrequest.org?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing)
- Checked: 2026-11-11

## In the answer

- Completeness: 40%
- Owner's name: ✓
- ASN: ✓
- Network range: ✓
- Country: ✓

## Score

- Overall score: 88.9
- Price score: 100
- Accuracy score: 71
- Cost to get started score: 100
- Bundle score: 93
- Performance score: 100

## Price

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

## Charges

- Also pays for: WHOIS Lookup · RDAP Lookup · IP WHOIS Lookup · Domain Availability Check · DNS Lookup · DNS Report · DNSSEC Check · Nameserver Lookup · Reverse DNS Lookup · Hosting Lookup · Website Uptime Check · SSL Certificate Check · HTTP Headers Check · IDN and Punycode Converter

## Not found

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

## In their words

- Their pitch: An IP-to-ASN lookup maps a public address to the autonomous-system and network context reported by the lookup source, it does not identify an individual user.

## Data

- Freshness: live
- Keep data: no limit
- Use data: Use WhoisRequest.org for lawful registration research, network diagnostics and operational troubleshooting. Access to a public lookup does not grant permission to misuse the returned data or the upstream service. Do not use the service for harassment, bulk personal-data harvesting, credential attacks, unauthorized surveillance, service disruption, automated load, or attempts to reach private infrastructure. Respect the policies and rate limits of the original data provider.

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 0.05 s

## The call

- You send: IPv4 or IPv6 address
- Method: GET
- Path: /api/v1/lookup/asn-lookup/{IPv4 or IPv6 address}

## About the plan

- Plan: Free
- Who can get it: anyone, no account or API key

## The 11 fields the plan's answer can hold

query, ASN, organization, ISP, network domain, connection type, country, source, checked at, methodology URL, tool

## WhoisRequest's plans (1)

- [WhoisRequest, free](https://datacircle.dev/ip-company-lookup-apis/whoisrequest/free/llms.txt): $0.00 per 1,000, 40% complete, live

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

- `GET /api/v1/lookup/asn-lookup/{IPv4 or IPv6 address}`: [WhoisRequest, free](https://datacircle.dev/ip-company-lookup-apis/whoisrequest/free/llms.txt)

## WhoisRequest's APIs (2)

- [WhoisRequest IP company lookup API pricing, 1 plan](https://datacircle.dev/ip-company-lookup-apis/whoisrequest/free/llms.txt)
- [WhoisRequest Domain WHOIS API pricing, 1 plan, GET /api/v1/lookup/rdap/{domain name}](https://datacircle.dev/domain-whois-apis/whoisrequest/free-get-api-v1-lookup-rdap-domain-name/llms.txt)
- [WhoisRequest Domain WHOIS API pricing, 1 plan, GET /api/v1/lookup/whois/{domain name}](https://datacircle.dev/domain-whois-apis/whoisrequest/free-get-api-v1-lookup-whois-domain-name/llms.txt)

## WhoisRequest: IP company lookup API alternatives

[WhoisRequest alternatives: every IP company lookup API provider ranked](https://datacircle.dev/whoisrequest-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 IP addresses. Each plan in the list gives live data.

- [FluentEDI, free](https://datacircle.dev/ip-company-lookup-apis/fluentedi/free/llms.txt): $0.00 per 1,000, 20% complete, live
- [How.is, free](https://datacircle.dev/ip-company-lookup-apis/how-is/free/llms.txt): $0.00 per 1,000, 40% complete, live
- [WhoisFreaks, free, GET /v1.0/ip-whois](https://datacircle.dev/ip-company-lookup-apis/whoisfreaks/free-get-v1-0-ip-whois/llms.txt): $0.00 per 1,000, 20% complete, live
- [Agent Data Tools, free calls, GET /pack/ip-intelligence](https://datacircle.dev/ip-company-lookup-apis/agent-data-tools/free-calls-get-pack-ip-intelligence/llms.txt): $0.00 per 1,000, 20% complete, live

## Sources

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

- https://whoisrequest.org/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/methodology?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/privacy-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/rdap?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/tools/asn-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://whoisrequest.org/whois?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing