Identify the ASN for any IP address. Get the Autonomous System Number, organisation name, network type, and risk classification. 10,000 requests per month for free. Database downloads available.
IP Trust maps any IP to its ASN, returning the AS number, registered name, owning organisation, BGP route prefix, RIR, network classification, and risk scoring powered by Friendly Captcha.
| JSON Field | Description | Package |
|---|---|---|
| { | ||
| "asn": { | ||
| "number": "AS8075", | The Autonomous System Number that announces this IP prefix. | Identity |
| "name": "MICROSOFT-CORP-MSN-AS-BLOCK", | The registered name of the AS as listed by the RIR. | Identity |
| "company": "Microsoft Corporation", | The legal organisation name that owns the AS. | Identity |
| "country": "US", | ISO 3166-1 alpha-2 country code where the AS is registered. | Identity |
| "route": "74.144.0.0/12", | The most-specific BGP route prefix that contains this IP. | Identity |
| "rir": "ARIN", | The Regional Internet Registry responsible for this address block (e.g. ARIN, RIPE, APNIC). | Identity |
| "domain": "www.microsoft.com", | optional Primary domain associated with the AS owner, if available. | Identity |
| "type": "hosting", | optionalClassification of the AS, if available. One of: isp, hosting, business, government, education. |
Identity |
| "description": "Provides consumer and enterprise software...", | optional Human-readable description of the organisation that owns this AS. | Identity |
| "risk": 0.9, | optional Numeric risk score for the AS, from 0.0 (very low risk) to 1.0 (very high risk), based on observed threat signals from Friendly Captcha. Only provided when Friendly Captcha has observed enough traffic to make a determination. | Identity |
| "risk_label": "very_high", | optional Human-readable risk level: very_low, low, moderate, high, or very_high. |
Identity |
| "risk_types": ["request_frequency", "repeated_abuse"] | optional List of risk signal categories that contributed to the risk score, if available:
|
Identity |
| } | ||
| } |
| Field | Value | Description | Package |
|---|---|---|---|
| asn | AS8075 | The Autonomous System Number that announces this IP prefix. | Identity |
| asn_name | MICROSOFT-CORP-MSN-AS-BLOCK | The registered name of the AS as listed by the RIR. | Identity |
| asn_company | Microsoft Corporation | The legal organisation name that owns the AS. | Identity |
| asn_country | US | ISO 3166-1 alpha-2 country code where the AS is registered. | Identity |
| route | 74.144.0.0/12 | The most-specific BGP route prefix that contains this IP. | Identity |
| rir | ARIN | The Regional Internet Registry responsible for this address block (e.g. ARIN, RIPE, APNIC). | Identity |
| asn_domain | www.microsoft.com | Primary domain associated with the AS owner, if available. | Identity |
| asn_type | hosting | Classification of the AS. One of: isp, hosting, business, government, education. | Identity |
| asn_description | Provides consumer and enterprise software... | Human-readable description of the organisation that owns this AS. | Identity |
| asn_risk | 0.9 | Numeric risk score for the AS, from 0.0 (very low risk) to 1.0 (very high risk). | Identity |
| asn_risk_label | very_high | Human-readable risk level: very_low, low, moderate, high, or very_high. | Identity |
IP Trust ASN data can be used to detect hosting providers, classify traffic sources, and evaulate request risk.
Identify traffic originating from data centres, hosting providers, and high-risk networks. Flag or challenge requests from ASNs with elevated risk scores to protect your platform from automated abuse.
Distinguish between ISP, hosting, business, government, and education networks. Tailor your security rules and access policies based on the type of network a request originates from.
Enrich your analytics with network-level metadata. Understand which ISPs and organisations are driving traffic to your platform, and identify patterns across autonomous systems.
As part of Friendly Captcha, the IP Trust ASN database has been helping to protect the internet from bots since 2020.
We collect ASN data directly from all five Regional Internet Registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC) and live BGP routing tables. We own our entire database outright and never resell data from other providers.
Every AS is classified by type (ISP, hosting, business, government, education) and scored for risk based on real-world threat signals observed by Friendly Captcha across billions of requests.
Complete coverage of all allocated ASNs worldwide. Our ASN data is updated daily to reflect the latest BGP routing changes, new AS registrations, and ownership transfers.
Choose the integration model that works best for your use case.
| Network | ASN | Company | Country | Type | Risk | Risk Label |
|---|---|---|---|---|---|---|
| 1.235.198.0/23 | AS9318 | SK Broadband Co Ltd | KR | isp | 0 | very_low |
| 4.242.248.0/21 | AS8075 | Microsoft Corporation | US | hosting | 0.9 | very_high |
| 5.108.121.0/24 | AS35819 | Mobily | SA | isp | 0.1 | low |
| 14.47.85.0/24 | AS4766 | Korea Telecom | KR | isp | 0.2 | low |
| 23.192.0.0/11 | AS16625 | Akamai Technologies | US | hosting | 0.3 | moderate |
IP to ASN is the process of mapping an IP address to its Autonomous System Number - the unique identifier assigned to a network on the internet. An ASN tells you which organisation owns and operates the network behind any given IP address, whether it's an ISP, a cloud provider, a business, or a government entity.
Each IP to ASN lookup returns the AS number, registered name, owning organisation, country of registration, BGP route prefix, and Regional Internet Registry (RIR). The Identity package also includes network classification (ISP, hosting, business, government, education), a human-readable description, and a risk score based on real-world threat signals observed by Friendly Captcha.
Yes. The IP Trust ASN database is available for download as part of the Identity database package. It includes all ASN fields in MMDB, CSV, JSON, and Parquet formats. The ASN database is updated daily and allows you to perform IP to ASN lookups locally with zero external calls. See our database downloads page for details.
The ASN risk score ranges from 0.0 (very low) to 1.0 (very high) and is based on real-world threat signals observed by Friendly Captcha across billions of requests. Risk types include confirmed bots, suspected bots, abnormal traffic volume, repeated abuse, and targeted abuse. The score is only provided when enough traffic has been observed to make a reliable determination.
Yes. IP Trust provides full IP to ASN mapping for both IPv4 and IPv6 addresses. The ASN database covers all allocated autonomous systems from all five Regional Internet Registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC) with daily updates.