ipv4.fr network tools

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

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.

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

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. Organization data only. Cached 7 days.

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

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

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

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

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

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

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.

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.

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

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