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Domains How it works Pricing All tools Diagnostics DNS check WHOIS lookup Port check SSL check Mail Mail check Blacklist check (DNSBL) Reverse DNS (PTR) Utilities My IP SSL CSR Speedtest FAQ Contact Cart Client Area

Port check

Port check

We try to connect to the chosen TCP port from our server.

Domain or IP address

Enter a port number from 1 to 65535. A closed port may be blocked by a firewall.

Website hosting and domain registration with our own BYPanelX control panel.

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SSL by Let's Encrypt Payments via Paddle Domains via an ICANN-accredited partner Price doesn't jump up after the first term

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Client area

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An account is used for checkout, invoices and domain management.

New registrations use the protected FOSSBilling page where its anti-spam protection is enabled. Your cart is already saved.

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Repeat password

The password goes directly to the protected FOSSBilling service and is never stored on this website.

We use Google Analytics to understand how visitors use the site. Data is anonymized (IP addresses are masked).