# heade.rs, free: IP company lookup API

> Use when asked where a site is hosted or who runs an IP

heade.rs'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. heade.rs's docs list 3: Owner's name, ASN, Network range.
heade.rs 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 81.9 out of 100. heade.rs ranks 6th of 61 providers.
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/heade-rs/free
- [IP company lookup API in 2026: the best of 60+ compared](https://datacircle.dev/best-ip-company-lookup-api.txt)
- Get it: https://heade.rs/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Request: `GET https://heade.rs/api/{query}`
- API key: not needed
- Its API docs: https://heade.rs/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Sold by: heade.rs (https://heade.rs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 30%
- Owner's name: ✓
- ASN: ✓
- Network range: ✓

## Score

- Overall score: 81.9
- Price score: 100
- Accuracy score: 99
- Cost to get started score: 100
- Bundle score: 0
- Performance score: 6

## 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: Use when asked where a site is hosted or who runs an IP

## Data

- Freshness: 24 hours
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0

## Rate limit

- Per second: 0.5 (30 a minute)
- Batch: 1

## Speed

- Answer: in the call
- Median: 1.61 s

## The call

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

## About the plan

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

## The 16 fields the plan's answer can hold

IP address, ASN, AS name, organization, network type, AS country, BGP prefix, regional registry, allocated range, allocation name, registered organization, organization address, allocation date, abuse contact, reverse DNS, network website

## heade.rs's plans (1)

- [heade.rs, free](https://datacircle.dev/ip-company-lookup-apis/heade-rs/free/llms.txt): $0.00 per 1,000, 30% complete, 24 hours

## heade.rs's calls (1)

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

## heade.rs's APIs (3)

- [heade.rs: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/heade-rs/free/llms.txt)
- [heade.rs: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/heade-rs/free/llms.txt)
- [heade.rs: IP company lookup API pricing, 1 plan](https://datacircle.dev/ip-company-lookup-apis/heade-rs/free/llms.txt)

## heade.rs: 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
- [ip.guide, free](https://datacircle.dev/ip-company-lookup-apis/ip-guide/free/llms.txt): $0.00 per 1,000, 50% complete, 1 day
- [IPLocate, free](https://datacircle.dev/ip-company-lookup-apis/iplocate/free/llms.txt): $0.00 per 1,000, 80% complete, 1 day
- [IP-API.com, free, POST /batch](https://datacircle.dev/ip-company-lookup-apis/ip-api-com/free-post-batch/llms.txt): $0.00 per 1,000, 50% complete, 24 hours

## 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://heade.rs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/.well-known/agent-skills/heade-rs/SKILL.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/api/1.1.1.1?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/api/github.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://heade.rs/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing