ipv4.fr network tools

HTTP response headers of a public URL (HEAD request, redirects reported, not followed).

AI security audit of a domain: runs DNS, SPF, DMARC, TLS, HTTP security headers, WHOIS expiry and IP blacklist checks, then returns a 0-100 score, findings by severity and exact fixes (DNS records and header lines to add). Reports are cached 24h.

Fetch a public web page and return its main content as clean Markdown (Readability extraction, tables kept, no ads or navigation), plus title, language and metadata. Add summary=1 for an AI summary and key points ($0.01 instead of $0.005). Cached 1h per URL.

Company profile from a domain for lead enrichment: name, one-line description, industry, business model, products, HQ country and city, founded year, size hint (AI-extracted from the site's own home, about and contact pages), plus contact and about page URLs, public role emails, social profiles, email provider, DNS provider, verified SaaS services and web tech read directly from the site and DNS.

Convert a public PDF (up to 20 pages, 20 MB) to clean Markdown: text is extracted from the PDF, then AI rebuilds headings, paragraphs, lists and tables while keeping the original wording. Text-based PDFs only (no OCR). Longer PDFs are refused before payment. Cached 24h per URL.

Check an IPv4 address against 3 DNS blacklists (Barracuda, SpamCop, UCEPROTECT).

Email authentication check for a domain: SPF, DMARC policy and common DKIM selectors, with findings and a verdict.

Which autonomous system (AS) announces an IPv4 address, with the covering prefix, the AS holder and its country.

Holder, country and registry of an autonomous system (AS number), with the prefixes it announces.

IP geolocation: country, city, ISP, coordinates, timezone.

DNS records (A, AAAA, MX, TXT, NS by default) for a domain.

TLS certificate of a public host on port 443: validity, issuer, expiry, SAN.

WHOIS registration data for a domain: registrar, dates, name servers.

Email address validation: syntax, MX, SMTP mailbox check, disposable and role detection.