# Ipv4 (ipv4.fr)

Serves IP lookup, DNS, SSL, WHOIS, email validation, blacklist and subnet checks through a JSON API.

- Atlas card: https://inite.ai/en/atlas/ipv4.fr
- Site: https://ipv4.fr
- For: Developers needing DNS, SSL, WHOIS and IP lookups through an API or terminal
- Use 31/100 · alive 55/100

## Used for

- Check domain DNS records and SSL certificate expiry
- Validate email addresses and flag disposable providers
- Check IP addresses against spam blacklists

## Price

- from 9 EUR/month, free plan (read 2026-10-24 on https://ipv4.fr/pricing)

## For developers

- OpenAPI: https://ipv4.fr/openapi.json (23 paths)
- MCP server: fr.ipv4/network-tools (namespace; open on 2026-10-24, 8 tools)
- Read 2026-10-24

## MCP server, measured daily

Server: https://ipv4.fr/mcp, checked every day since 2026-10-24 (11 checks).

- Answered: 100% of daily checks
- Median first answer: 631 ms
- Sign-in: none
- Context its tool definitions take: about 870 tokens (9 tools)
- Tool definitions: A, 96/100
- Failing "params_described": 2 of 9 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-24

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Source: INITE Atlas, https://inite.ai/en/atlas/ipv4.fr. JSON: https://inite.ai/api/atlas/ipv4.fr. MCP: https://inite.ai/api/mcp (atlas_lookup).