4z.com

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

3 of 4 safety checks passed (Sep 18, 2026).

AboutUs has not vetted this site. 1 of 4 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

Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.

Authority & Safety, with the evidence

How this is scored →

Authority: not enough signals yetClear

Why we're not scoring this yet

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

No unexpired threat-feed result; name-similarity check available (recorded about 30 days ago); 3/3 transport and email checks available (oldest recorded about 30 days ago). This is evidence coverage, not a probability that a website is safe.

No caution flags in the available scoring observations; this is not a complete safety assessment

Site history

Dated record — historical facts always carry their date.

1998
Domain registered (Jun 8, 1998).
2026
Checked today — 3 of 4 safety checks passed (Sep 18, 2026).

✓ domain continuity 28 years registered✓ live verified Sep 18, 2026

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