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

Enter a host and UDP port (e.g. 8.8.8.8:53) in the UDP checker. The tool sends protocol-appropriate payloads from 50+ global nodes — for example, a real DNS query to port 53 or an NTP request to port 123 — and reports whether a valid response was received from each location.

Why does UDP port testing require a payload?

Unlike TCP, UDP has no handshake. An empty packet sent to most UDP services produces no response because the application is waiting for meaningful data before replying. The tool automatically injects the correct payload for known ports (DNS/53, NTP/123, SNMP/161, game servers/27015) to get a real, meaningful response.

How do I test if my VPN UDP port is reachable?

Enter your VPN server IP and port (typically UDP 1194 for OpenVPN or UDP 51820 for WireGuard) and run the UDP check. Results from multiple global nodes will show whether your VPN port is accessible worldwide or blocked by specific ISPs or regional networks.

Can I test game server ports with this UDP checker?

Yes. For Source Engine game servers (CS:GO, TF2, Rust) on port 27015, the tool automatically sends a valid Source Engine query packet. For other game servers, you can enter a custom hex payload in the advanced options. Results show which global regions can reach your game server.

تقرير النطاق https:80

Info Ping HTTP TCP UDP MTR DNS

report.report_types.udp https:80

تم الفحص بتوقيت Apr 20, 2026 18:56:36 UTC |

| إعادة الفحص |

الموقع	النتيجة	الوقت	عنوان IP
Albania, Tirana	DNS Error: No valid public IP found for https	-	-
Australia, Sydney	DNS Error: No valid public IP found for https	-	-
Bosnia and Herzegovina, Novi Travnik	DNS Error: No valid public IP found for https	-	-
Bulgaria, Sofia	DNS Error: No valid public IP found for https	-	-
Canada, Montreal	DNS Error: No valid public IP found for https	-	-
Switzerland, Bern	DNS Error: No valid public IP found for https	-	-
Chile, Santiago	DNS Error: No valid public IP found for https	-	-
China, Hohhot	DNS Error: No valid public IP found for https	-	-
Germany, Nuernberg	DNS Error: No valid public IP found for https	-	-
Germany, Frankfurt am Main	DNS Error: No valid public IP found for https	-	-
Germany, Frankfurt am Main	DNS Error: No valid public IP found for https	-	-
Germany, Limburg	DNS Error: No valid public IP found for https	-	-
Germany, Frankfurt am Main	DNS Error: No valid public IP found for https	-	-
Germany, Duesseldorf	DNS Error: No valid public IP found for https	-	-
Denmark, Glostrup Municipality	DNS Error: No valid public IP found for https	-	-
Spain, Bilbao	DNS Error: No valid public IP found for https	-	-
Finland, Helsinki	DNS Error: No valid public IP found for https	-	-
Finland, Helsinki	DNS Error: No valid public IP found for https	-	-
France, Gravelines	DNS Error: No valid public IP found for https	-	-
France, Paris	DNS Error: No valid public IP found for https	-	-
United Kingdom, London	DNS Error: No valid public IP found for https	-	-
Georgia, Tbilisi	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	https
Greece, Athens	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	https
Hong Kong, Hong Kong	DNS Error: No valid public IP found for https	-	-
Croatia, Zagreb	DNS Error: No valid public IP found for https	-	-
Hungary, Budapest	DNS Error: No valid public IP found for https	-	-
Indonesia, Jakarta	DNS Error: No valid public IP found for https	-	-
Israel, Petach Tikwa	DNS Error: No valid public IP found for https	-	-
Israel, Netanja	DNS Error: No valid public IP found for https	-	-
India, New Delhi	DNS Error: No valid public IP found for https	-	-
Iceland, Reykjavik (Miðborg)	DNS Error: No valid public IP found for https	-	-
Kuwait, Kuwait City	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	https
Lithuania, Pilaite	DNS Error: No valid public IP found for https	-	-
Latvia, Riga	DNS Error: No valid public IP found for https	-	-
Moldova, Chisinau	DNS Error: No valid public IP found for https	-	-
Netherlands, Amsterdam	DNS Error: No valid public IP found for https	-	-
Netherlands, Amsterdam	DNS Error: No valid public IP found for https	-	-
Netherlands, Amsterdam	DNS Error: No valid public IP found for https	-	-
Netherlands, Amsterdam	DNS Error: No valid public IP found for https	-	-
Norway, Oslo	DNS Error: No valid public IP found for https	-	-
Poland, Warsaw	DNS Error: No valid public IP found for https	-	-
Romania, Bacău	DNS Error: No valid public IP found for https	-	-
Romania, Bucharest	DNS Error: No valid public IP found for https	-	-
Serbia, Belgrade	DNS Error: No valid public IP found for https	-	-
Russia, St Petersburg	DNS Error: No valid public IP found for https	-	-
Singapore, Singapore	DNS Error: No valid public IP found for https	-	-
Turkey, Istanbul	DNS Error: No valid public IP found for https	-	-
Taiwan, Taipei	DNS Error: No valid public IP found for https	-	-
United States, Miami	DNS Error: No valid public IP found for https	-	-
United States, Dallas	DNS Error: No valid public IP found for https	-	-
United States, Kansas City	DNS Error: No valid public IP found for https	-	-
United States, Dallas	DNS Error: No valid public IP found for https	-	-
South Africa, Johannesburg	DNS Error: No valid public IP found for https	-	-