How do I check if a TCP port is open online?

Enter your server's IP address or domain followed by a colon and the port number (e.g. 1.1.1.1:80 or example.com:443) and run a TCP check. The tool attempts a TCP handshake from 65+ global nodes and reports whether each connection succeeded, was refused, or timed out.

What is the difference between a port being refused versus timing out?

A refused connection (TCP RST) means the port is actively closed — the server replied to reject the connection. A timeout means no reply was received at all, which typically indicates a firewall is silently dropping packets before they reach the server or application.

Which TCP ports can I test?

Any valid TCP port from 1 to 65535. Common examples include port 80 (HTTP), 443 (HTTPS), 22 (SSH), 25 (SMTP), 3306 (MySQL), 5432 (PostgreSQL), and 3389 (RDP). No login or special permissions required — the check only verifies whether the TCP handshake completes.

My port is open locally but fails from external nodes — why?

If a port works locally but fails from external nodes, something between the internet and your server is blocking it — commonly a cloud security group, iptables rule, upstream ISP filter, or geoblocking policy. Running the check from multiple regions helps identify whether the block is global or specific to certain countries or ASNs.

تقرير النطاق www.tibia.com:80

Info Ping HTTP TCP UDP MTR DNS

فحص TCP www.tibia.com:80

تم الفحص بتوقيت Jul 21, 2026 13:20:31 UTC |

| إعادة الفحص |

الموقع	النتيجة	الوقت	عنوان IP
Albania, Tirana	Connected	106.0 ms	104.18.114.8
Australia, Sydney	Connected	1.0 ms	104.18.114.8
Bosnia and Herzegovina, Novi Travnik	Connected	18.0 ms	104.18.114.8
Bulgaria, Sofia	Connected	1.0 ms	104.18.185.8
Brazil, São Paulo	Connected	2.0 ms	104.18.185.8
Canada, Montreal	Connected	8.0 ms	104.18.114.8
Switzerland, Bern	Connected	1.0 ms	104.18.185.8
Switzerland, Zurich	Connected	2.0 ms	104.18.185.8
Chile, Santiago	Connected	48.0 ms	104.18.185.8
China, Hohhot	Connected	188.0 ms	104.18.114.8
Germany, Nuernberg	Connected	5.0 ms	104.18.114.8
Germany, Frankfurt am Main	Connected	0.0 ms	104.18.185.8
Germany, Limburg	Connected	2.0 ms	104.18.185.8
Germany, Frankfurt am Main	Connected	1.0 ms	104.18.114.8
Germany, Frankfurt am Main	Connected	1.0 ms	104.18.114.8
Germany, Frankfurt am Main	Connected	2.0 ms	104.18.114.8
Germany, Koblenz	Connected	5.0 ms	104.18.114.8
Denmark, Glostrup Municipality	Connected	13.0 ms	104.18.185.8
Spain, Bilbao	Connected	52.0 ms	104.18.114.8
Spain, Barcelona	Connected	28.0 ms	104.18.185.8
Finland, Helsinki	Connected	4.0 ms	104.18.185.8
Finland, Helsinki	Connected	20.0 ms	104.18.114.8
France, Gravelines	Connected	5.0 ms	104.18.185.8
France, Paris	Connected	11.0 ms	104.18.114.8
United Kingdom, London	Connected	6.0 ms	104.18.185.8
Georgia, Tbilisi	ERROR	-	www.tibia.com
Hong Kong, Hong Kong	Connected	2.0 ms	104.18.185.8
Croatia, Zagreb	Connected	28.0 ms	104.18.114.8
Hungary, Budapest	Connected	15.0 ms	104.18.185.8
Israel, Petach Tikwa	Connected	1.0 ms	104.18.114.8
Israel, Netanja	Connected	1.0 ms	104.18.185.8
India, New Delhi	Connected	1.0 ms	104.18.185.8
Iceland, Reykjavik (Miðborg)	Connected	3.0 ms	104.18.185.8
Italy, Como	Connected	1.0 ms	104.18.185.8
South Korea, Seoul	Connected	2.0 ms	104.18.185.8
Lithuania, Pilaite	Connected	131.0 ms	104.18.114.8
Latvia, Riga	Connected	32.0 ms	104.18.114.8
Moldova, Chisinau	Connected	46.0 ms	104.18.114.8
Netherlands, Amsterdam	Connected	1.0 ms	104.18.185.8
Netherlands, Amsterdam	Connected	3.0 ms	104.18.185.8
Netherlands, Amsterdam	Connected	1.0 ms	104.18.185.8
Netherlands, Amsterdam	Connected	2.0 ms	104.18.185.8
Netherlands, Eygelshoven	Connected	4.0 ms	104.18.114.8
Norway, Oslo	Connected	0.0 ms	104.18.114.8
Poland, Warsaw	Connected	25.0 ms	104.18.185.8
Romania, Bacău	Connected	40.0 ms	104.18.114.8
Romania, Bucharest	Connected	8.0 ms	104.18.114.8
Serbia, Belgrade	Connected	5.0 ms	104.18.114.8
Russia, Moscow	Connected	22.0 ms	104.18.114.8
Singapore, Singapore	Connected	1.0 ms	104.18.114.8
Tor, Onion	ERROR	-	www.tibia.com
Tor, Onion	ERROR	-	www.tibia.com
Tor, Onion	ERROR	-	www.tibia.com
Turkey, Istanbul	Connected	2.0 ms	104.18.185.8
Turkey, Istanbul	Connected	5.0 ms	104.18.185.8
Taiwan, Taipei	Connected	3.0 ms	104.18.114.8
Ukraine, Khmelnytskyi	Connected	22.0 ms	104.18.114.8
United States, Dallas	Connected	32.0 ms	104.18.185.8
United States, Dallas	Connected	16.0 ms	104.18.114.8
United States, Los Angeles	Connected	1.0 ms	104.18.185.8
United States, Houston	Connected	37.0 ms	104.18.185.8
United States, Miami	Connected	1.0 ms	104.18.114.8
South Africa, Johannesburg	Connected	2.0 ms	104.18.185.8
South Africa, Johannesburg	Connected	2.0 ms	104.18.114.8