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.

ca-mon-ovh.check-host.eu:80 için Rapor

Name: Check-Host ca-mon-ovh.check-host.eu:80 UDP Port Erişilebilirlik Kontrolü
Author: Check-Host

Info Ping HTTP TCP UDP MTR DNS

report.report_types.udp ca-mon-ovh.check-host.eu:80

Apr 21, 2026 04:43:58 UTC tarihinde kontrol edildi |

| Tekrar kontrol et |

Konum	Sonuç	Süre	IP Adresi
Albania, Tirana	Timeout	-	51.79.33.105
Australia, Sydney	Timeout	-	51.79.33.105
Bosnia and Herzegovina, Novi Travnik	Timeout	-	51.79.33.105
Bulgaria, Sofia	Timeout	-	51.79.33.105
Canada, Montreal	Timeout	-	51.79.33.105
Switzerland, Bern	Timeout	-	51.79.33.105
Chile, Santiago	Timeout	-	51.79.33.105
China, Hohhot	Timeout	-	51.79.33.105
Germany, Nuernberg	Timeout	-	51.79.33.105
Germany, Frankfurt am Main	Timeout	-	51.79.33.105
Germany, Frankfurt am Main	Timeout	-	51.79.33.105
Germany, Limburg	Timeout	-	51.79.33.105
Germany, Frankfurt am Main	Timeout	-	51.79.33.105
Germany, Duesseldorf	Timeout	-	51.79.33.105
Denmark, Glostrup Municipality	Timeout	-	51.79.33.105
Spain, Bilbao	Timeout	-	51.79.33.105
Finland, Helsinki	Timeout	-	51.79.33.105
Finland, Helsinki	Timeout	-	51.79.33.105
France, Gravelines	Timeout	-	51.79.33.105
France, Paris	Timeout	-	51.79.33.105
United Kingdom, London	Timeout	-	51.79.33.105
Georgia, Tbilisi	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	ca-mon-ovh.check-host.eu
Greece, Athens	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	ca-mon-ovh.check-host.eu
Hong Kong, Hong Kong	Timeout	-	51.79.33.105
Croatia, Zagreb	Timeout	-	51.79.33.105
Hungary, Budapest	Timeout	-	51.79.33.105
Indonesia, Jakarta	Timeout	-	51.79.33.105
Israel, Petach Tikwa	Timeout	-	51.79.33.105
Israel, Netanja	Timeout	-	51.79.33.105
India, New Delhi	Timeout	-	51.79.33.105
Iceland, Reykjavik (Miðborg)	Timeout	-	51.79.33.105
Italy, Como	Timeout	-	51.79.33.105
Kuwait, Kuwait City	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	ca-mon-ovh.check-host.eu
Lithuania, Pilaite	Timeout	-	51.79.33.105
Latvia, Riga	Timeout	-	51.79.33.105
Moldova, Chisinau	Timeout	-	51.79.33.105
Netherlands, Amsterdam	Timeout	-	51.79.33.105
Netherlands, Amsterdam	Timeout	-	51.79.33.105
Netherlands, Amsterdam	Timeout	-	51.79.33.105
Netherlands, Amsterdam	Timeout	-	51.79.33.105
Norway, Oslo	Timeout	-	51.79.33.105
Poland, Warsaw	Timeout	-	51.79.33.105
Romania, Bacău	Timeout	-	51.79.33.105
Romania, Bucharest	Timeout	-	51.79.33.105
Serbia, Belgrade	Timeout	-	51.79.33.105
Russia, St Petersburg	Timeout	-	51.79.33.105
Singapore, Singapore	Timeout	-	51.79.33.105
Turkey, Istanbul	Timeout	-	51.79.33.105
Taiwan, Taipei	Timeout	-	51.79.33.105
United States, Miami	Timeout	-	51.79.33.105
United States, Dallas	Timeout	-	51.79.33.105
United States, Kansas City	Timeout	-	51.79.33.105
United States, Dallas	Timeout	-	51.79.33.105
South Africa, Johannesburg	Timeout	-	51.79.33.105