# 51Degrees, contact us: IP company lookup API

> Network data: ISP, organization, connection type

51Degrees' Bespoke plan lets you call the IP company lookup API. We check each provider's docs for 10 fields. 51Degrees' docs list 4: Owner's name, ASN, Network range, Country.
We haven't run 51Degrees through [our IP company lookup API benchmark](https://datacircle.dev/best-ip-company-lookup-api.txt) yet.
51Degrees gives this plan's price on request. We rank 606 plans for IP company lookup APIs by price. Half the plans cost $0.167 or less per 1,000 IP addresses. 51Degrees has no free IP company lookup API plan. [203 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.
[IPScanner's $5 pack](https://datacircle.dev/ip-company-lookup-apis/ipscanner/5-pack-pay-as-you-go-5-get-asn-ip/llms.txt) is the cheapest paid plan per 1,000 IP addresses. IPScanner's IP company lookup API costs nothing beyond the plan price. [ipapi.is' top-up plan](https://datacircle.dev/ip-company-lookup-apis/ipapi-is/top-up-from-1-one-time-credits-post/llms.txt) costs the least for 10,000 IP addresses a month: $1.00.
[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 [IPLogs](https://datacircle.dev/ip-company-lookup-apis/iplogs/free-get-v1-lookup-ip/llms.txt) are the best IP company lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/ip-company-lookup-apis/51degrees/contact-us
- [IP company lookup API in 2026: the best of 80+ compared](https://datacircle.dev/best-ip-company-lookup-api.txt)
- Get it: https://51degrees.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://51degrees.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Its API docs: https://51degrees.com/documentation/_ip_intelligence__overview.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- Sold by: 51Degrees (https://51degrees.com?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: ✓

## Price

- Per: call
- Billing: contact

## In their words

- Their pitch: Network data: ISP, organization, connection type

## Data

- Freshness: 1 day
- Keep data: no limit
- Use data: 2.2 You shall: [...] 2.2.2 use the Cloud Services solely for your own internal business purposes or, if you are an agency, developer or other service provider using the Cloud Services for, or on behalf of, your client, solely for that client's internal business purposes [...] 2.3 You shall not: 2.3.1 exceed the number of permitted Requests set out in an Order, nor 2.3.2 perform any batch or offline processing using the Cloud Services and shall only use those services in connection with real-time Requests (via web or client applications) only.

## Plan

- Enough for: no limit

## Speed

- Answer: in the call

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Bespoke
- Who can get it: traders only: "We only wish to contract with traders, within the meaning of section 2 of the Consumer Rights Act 2015"

## The 9 fields the plan's answer can hold

IP address, IP range start, IP range end, registered name, registered owner, registered country, registered country GeoName ID, ASN, ASN name

## 51Degrees' plans (1)

- [51Degrees, contact us](https://datacircle.dev/ip-company-lookup-apis/51degrees/contact-us/llms.txt): 40% complete, 1 day

## 51Degrees' calls (1)

- Docs behind sign-up: [51Degrees, contact us](https://datacircle.dev/ip-company-lookup-apis/51degrees/contact-us/llms.txt)

## 51Degrees' APIs (2)

- [51Degrees IP geolocation API pricing, 5 plans](https://datacircle.dev/ip-geolocation-apis/51degrees/free/llms.txt)
- [51Degrees IP company lookup API pricing, 1 plan](https://datacircle.dev/ip-company-lookup-apis/51degrees/contact-us/llms.txt)

## 51Degrees: IP company lookup API alternatives

[51Degrees alternatives: other IP company lookup API providers by price](https://datacircle.dev/51degrees-alternatives.txt)

We list other providers' plans with no public price. These plans come closest to this plan in number of key fields. Each plan in the list gives live data or data at most a day old.

- [IP-API.com, contact us, Enterprise, POST /batch](https://datacircle.dev/ip-company-lookup-apis/ip-api-com/contact-us-enterprise-post-batch/llms.txt): 50% complete, 24 hours
- [DataAndAPIs, contact us, Custom solution, GET /v1/ip/{address}](https://datacircle.dev/ip-company-lookup-apis/dataandapis/contact-us-custom-solution-get-v1-ip-address/llms.txt): 40% complete, 1 day (ASN, AS organization, AS registry country, AS range start, AS range end: 1 hour)
- [IPGeolocation.io, contact us, Enterprise, GET /v3/asn](https://datacircle.dev/ip-company-lookup-apis/ipgeolocation-io/contact-us-enterprise-get-v3-asn/llms.txt): 40% complete, 24 hours
- [Aiwen IP, contact us, 300 calls a day for a year](https://datacircle.dev/ip-company-lookup-apis/aiwen-ip/contact-us-300-calls-a-day-for-a-year/llms.txt): 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 2026-11-11.

- https://51degrees.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/developers/ip-tester?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/documentation/_ip_intelligence__overview.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/documentation/index.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/terms/cloud-services-terms/20261106?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/terms/free/20261106?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://51degrees.com/terms/general-terms-and-conditions/20261019?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing
- https://github.com/51Degrees/ip-intelligence-dotnet?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=ip-company-lookup-api-pricing