Full parsed WHOIS records

IP WHOIS

Full WHOIS data for any IP address including allocation history, RIR registration, net block information, and ASN assignment data.

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Capabilities

Key Features

Structured, machine-readable WHOIS data for every IP block — no raw text parsing needed.

Full WHOIS Record Parsing

Raw WHOIS text parsed into clean, structured JSON. No regex hacks — every field extracted and normalised automatically.

Allocation Date & History

See when each IP block was first allocated and track changes in ownership, re-delegation, and registration history over time.

RIR Registration Data

Access the authoritative registration record from ARIN, RIPE, APNIC, LACNIC, or AFRINIC — whichever RIR manages this block.

Net Block Information

Get the full CIDR block, start and end IP addresses, and the total number of IPs in each allocated net block.

ASN Assignment Info

See which Autonomous System Number the IP block is assigned to, including ASN name and routing registry details.

Admin & Tech Contacts

Extract admin-c and tech-c handle records with contact details for the network's administrative and technical contacts.

Response Schema

Data Fields

All fields returned by the /v2/ip/{ip}/whois endpoint.

Field	Type	Description
`ip`	string	The queried IP address
`org`	string	Organisation name that owns this IP block
`netname`	string	Short network name handle registered in the RIR
`descr`	string	Description field from the WHOIS record
`country`	string	ISO 3166-1 alpha-2 country code
`admin_c`	string	Administrative contact handle
`tech_c`	string	Technical contact handle
`cidr`	string	CIDR notation of the allocated network block
`allocation_date`	string	ISO 8601 date when this block was first allocated
`rir`	string	Authoritative Regional Internet Registry
`status`	string	Allocation status (ALLOCATED, ASSIGNED, RESERVED, etc.)

Live Demo

See It In Action

Enter any IP address to retrieve its full WHOIS record.

{
  "ip": "8.8.8.8",
  "org": "Google LLC",
  "netname": "GOOGLE",
  "descr": "Google LLC",
  "country": "US",
  "admin_c": "ZG39-ARIN",
  "tech_c": "ZG39-ARIN",
  "cidr": "8.8.8.0/24",
  "allocation_date": "1992-12-01",
  "rir": "ARIN",
  "status": "ALLOCATED"
}

Applications

Use Cases

Network Ownership Verification

Confirm who legitimately owns and operates an IP block before establishing peering agreements or trusting traffic from that range.

Peering verification
Trust establishment
Firewall allowlist auditing

Threat Intelligence Research

Investigate suspicious IP addresses by examining their WHOIS history and registration details to identify threat actor infrastructure.

IOC enrichment
Attribution research
Historical block analysis

Compliance & Due Diligence

Document IP block ownership for regulatory compliance, KYC processes, and due diligence when onboarding new network partners or clients.

KYC documentation
Regulatory evidence gathering
Partner onboarding checks

Integration

API Reference

# Get full WHOIS data for an IP address
curl -X GET "https://api.hostinfo.com/v2/ip/8.8.8.8/whois" \
  -H "Authorization: Bearer YOUR_API_TOKEN"

// Get full WHOIS data for an IP address
const response = await fetch(
  'https://api.hostinfo.com/v2/ip/8.8.8.8/whois',
  { headers: { 'Authorization': 'Bearer YOUR_API_TOKEN' } }
);
const data = await response.json();
console.log(data.org, data.cidr, data.allocation_date);

# Get full WHOIS data for an IP address
import requests

data = requests.get(
    'https://api.hostinfo.com/v2/ip/8.8.8.8/whois',
    headers={'Authorization': 'Bearer YOUR_API_TOKEN'}
).json()
print(data['org'], data['cidr'], data['allocation_date'])

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