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DNSChecker

Fact-Checks

2 results
Dec 7, 2025
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Which online tools or services legitimately validate card numbers, expiry dates, and CVC codes?

There are many free online validators and developer libraries that check card number format and issuer data (using Luhn checks and IIN/BIN databases) — examples include CreditCardValidator.org (which ...

Dec 14, 2025
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How can I verify which DNS resolver my device or browser is actually using for encrypted queries?

You can check which resolver your device or browser uses by running active tests from the client that force a lookup and report which recursive resolver answered — tools exist that do this from your b...