# HackerTarget, free: IP company lookup API

> Check an Autonomous System Number (ASN) for IP prefixes (subnets) or lookup an IP address (IPv4 or IPv6) to get details and owner of the AS.

HackerTarget's Free plan for the IP company lookup API costs $0.00 per 1,000 IP addresses. HackerTarget's docs list 4 of the 10 fields on our checklist: Owner's name, Owner's domain, ASN, Network range.
In [our IP company lookup API benchmark](https://datacircle.dev/best-ip-company-lookup-api.txt), the best plan from HackerTarget scores 57.8 out of 100. HackerTarget ranks 12th of 15 providers.
This plan is free. We rank 398 plans for IP company lookup APIs by price. Half the plans cost $0.112 per 1,000 IP addresses or less. [See the best free IP company lookup API plan.](https://datacircle.dev/best-ip-company-lookup-api.txt)
[IPHunter's €99.99 monthly plan](https://datacircle.dev/ip-company-lookup-apis/iphunter/99-99-monthly/llms.txt) is the cheapest paid plan per 1,000 IP addresses. IPHunter's €99.99 monthly plan covers up to 11,520,000 IP addresses a day.
[FreeIPAPI's €9.90 monthly plan (/api/bulk/json)](https://datacircle.dev/ip-company-lookup-apis/freeipapi/9-90-monthly-unlimited-post-api-bulk-json/llms.txt) covers any number of IP addresses. FreeIPAPI's €9.90 monthly plan costs less up front than IPHunter's €99.99 monthly plan.
[DNSlytics](https://datacircle.dev/ip-company-lookup-apis/dnslytics/free/llms.txt), [ipwhois.io](https://datacircle.dev/ip-company-lookup-apis/ipwhois-io/free/llms.txt) and [IPBot](https://datacircle.dev/ip-company-lookup-apis/ipbot/free-anonymous-get-v1-ip-ip/llms.txt) are the best IP company lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/ip-company-lookup-apis/hackertarget/free
- [IP company lookup API: the 15 best providers compared](https://datacircle.dev/best-ip-company-lookup-api.txt)
- Get it: https://hackertarget.com/scan-membership/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Request: `GET https://api.hackertarget.com/aslookup/`
- API key: not needed
- Its API docs: https://hackertarget.com/as-ip-lookup/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Sold by: HackerTarget (https://hackertarget.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing)
- Checked: 2026-11-04

## In the answer

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

## Price

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

## Charges

- Also pays for: from the same budget: MTR Traceroute · Test Ping · DNS Lookup · Reverse DNS · Host Search · Zone Transfer · Whois Lookup · IP Geolocation · Reverse IP · TCP Port Scan · UDP Port Scan · Subnet Lookup · Banner Search · HTTP Headers · Page Links

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Check an Autonomous System Number (ASN) for IP prefixes (subnets) or lookup an IP address (IPv4 or IPv6) to get details and owner of the AS.

## Data

- Keep data: not without express written permission
- Use data: "If you are in the business of creating similar documents, goods or services for the purpose of providing them for a fee to users, whether they be business users or domestic users, then you are a competitor of HackerTarget.com. HackerTarget.com expressly excludes and does not permit you to use or access its website, to download any documents or information from its website or obtain any such documents or information through a third party." [...] "Any redistribution or reproduction of part or all of the contents in any form is prohibited other than the following: you may print or download to a local hard disk extracts for your personal and non-commercial use only, and you may copy the content to individual third parties for their personal use, but only if you acknowledge the website as the source of the material." [...] "You may not, except with our express written permission, distribute or commercially exploit the content. Nor may you transmit it or store it in any other website or other form of electronic retrieval system."

## Plan

- Pay: $0
- You get: 50 requests a day
- Enough for: 50 calls a day

## Rate limit

- Per day: 50
- Per second: 2
- Batch: 1

## Speed

- Answer: in the call
- Median: 0.20 s

## The call

- You send: q. Optional: details
- Method: GET
- Path: /aslookup/

## About the plan

- Plan: Free
- Who can get it: anyone, no sign-up, from a single IP

## The 7 fields the plan's answer can hold

IP address, ASN, ASN name, network route, ASN organization, ASN domain, ASN description

## HackerTarget's plans (8)

- [HackerTarget, free](https://datacircle.dev/ip-company-lookup-apis/hackertarget/free/llms.txt): $0.00 per 1,000, 40% complete
- [HackerTarget, $250 pack](https://datacircle.dev/ip-company-lookup-apis/hackertarget/250-pack/llms.txt): $2.50 per 1,000, 40% complete
- [HackerTarget, $120 yearly](https://datacircle.dev/ip-company-lookup-apis/hackertarget/120-yearly/llms.txt): $0.657 per 1,000, 40% complete
- [HackerTarget, $300 yearly](https://datacircle.dev/ip-company-lookup-apis/hackertarget/300-yearly/llms.txt): $0.822 per 1,000, 40% complete
- [HackerTarget, $600 yearly](https://datacircle.dev/ip-company-lookup-apis/hackertarget/600-yearly/llms.txt): $0.822 per 1,000, 40% complete
- [HackerTarget, $1,200 yearly](https://datacircle.dev/ip-company-lookup-apis/hackertarget/1200-yearly/llms.txt): $0.438 per 1,000, 40% complete
- [HackerTarget, $2,400 yearly](https://datacircle.dev/ip-company-lookup-apis/hackertarget/2400-yearly/llms.txt): $0.329 per 1,000, 40% complete
- [HackerTarget, contact us](https://datacircle.dev/ip-company-lookup-apis/hackertarget/contact-us/llms.txt): 40% complete

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

- `GET /aslookup/`: [HackerTarget, free](https://datacircle.dev/ip-company-lookup-apis/hackertarget/free/llms.txt)

## HackerTarget's APIs (2)

- [HackerTarget: domain WHOIS API pricing, 8 plans](https://datacircle.dev/domain-whois-apis/hackertarget/free/llms.txt)
- [HackerTarget: IP company lookup API pricing, 8 plans](https://datacircle.dev/ip-company-lookup-apis/hackertarget/free/llms.txt)

## HackerTarget: IP company lookup API alternatives

- [Netlas, $9,960 yearly](https://datacircle.dev/ip-company-lookup-apis/netlas/9960-yearly/llms.txt): $0.32 per 1,000, 30% complete, 15 days
- [Focsec, $29 monthly](https://datacircle.dev/ip-company-lookup-apis/focsec/29-monthly/llms.txt): $0.322 per 1,000, 20% complete
- [IP2Location.io, $49 monthly, Starter, GET /](https://datacircle.dev/ip-company-lookup-apis/ip2location-io/49-monthly-starter-get/llms.txt): $0.327 per 1,000, 60% complete, 1 day
- [ipify, $199 yearly, Yearly subscription: 100,000 Credits per month, GET /api/v2/country,city](https://datacircle.dev/ip-company-lookup-apis/ipify/199-yearly-yearly-subscription-100000-credits-per-month-get-api-v2-country-city/llms.txt): $0.332 per 1,000, 40% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://hackertarget.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://hackertarget.com/as-ip-lookup/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://hackertarget.com/enterprise/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://hackertarget.com/ip-tools/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://hackertarget.com/scan-membership/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://hackertarget.com/terms/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing