4z.com provides VoIP calling services and real-time fraud detection tools for telecom operators and individual users. It offers low-cost international calling with Swiss phone numbers, per-second billing, and free calls to 54 countries, alongside antifraud analytics that monitor call patterns and detect suspicious activity. The company is based in Lausanne, Switzerland.
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Authority
—/100
Safety
90/100
Registered
Jun 8, 1998
28 years old · Network Solutions, LLC
4 of 5 safety checks passed (Sep 6, 2026).
AboutUs has not vetted this site. 1 of 5 automated safety check did not pass. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
What AboutUs observed on the live site and in WHOIS/DNS today. These are measurements, not an endorsement of the site.
checked now
Domain registered Jun 8, 1998 — 28 years old.
checked now
Registrar today: Network Solutions, LLC — unchanged since AboutUs began tracking (Jul 29, 2026).
We withhold an authority number until independent evidence (global rank, link-graph presence) has accrued. The facts we do have about this site are shown below — we'd rather say “not enough signals yet” than invent a low score.
Safety evidence
All checked sources came back clean
Site history
Dated record — historical facts always carry their date.