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.

fr-gra-ovh.check-host.eu:80 için Rapor

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

Info Ping HTTP TCP UDP MTR DNS

report.report_types.udp fr-gra-ovh.check-host.eu:80

Apr 21, 2026 06:33:46 UTC tarihinde kontrol edildi |

| Tekrar kontrol et |

Konum	Sonuç	Süre	IP Adresi
Albania, Tirana	Timeout	-	51.254.49.253
Australia, Sydney	Timeout	-	51.254.49.253
Bosnia and Herzegovina, Novi Travnik	Timeout	-	51.254.49.253
Bulgaria, Sofia	Timeout	-	51.254.49.253
Canada, Montreal	Timeout	-	51.254.49.253
Switzerland, Bern	Timeout	-	51.254.49.253
Chile, Santiago	Timeout	-	51.254.49.253
China, Hohhot	Timeout	-	51.254.49.253
Germany, Nuernberg	Timeout	-	51.254.49.253
Germany, Frankfurt am Main	Timeout	-	51.254.49.253
Germany, Frankfurt am Main	Timeout	-	51.254.49.253
Germany, Limburg	Timeout	-	51.254.49.253
Germany, Frankfurt am Main	Timeout	-	51.254.49.253
Germany, Duesseldorf	Timeout	-	51.254.49.253
Denmark, Glostrup Municipality	Timeout	-	51.254.49.253
Spain, Bilbao	Timeout	-	51.254.49.253
Finland, Helsinki	Timeout	-	51.254.49.253
Finland, Helsinki	Timeout	-	51.254.49.253
France, Gravelines	Timeout	-	51.254.49.253
France, Paris	Timeout	-	51.254.49.253
United Kingdom, London	Timeout	-	51.254.49.253
Georgia, Tbilisi	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	fr-gra-ovh.check-host.eu
Greece, Athens	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	fr-gra-ovh.check-host.eu
Hong Kong, Hong Kong	Timeout	-	51.254.49.253
Croatia, Zagreb	Timeout	-	51.254.49.253
Hungary, Budapest	Timeout	-	51.254.49.253
Indonesia, Jakarta	Timeout	-	51.254.49.253
Israel, Petach Tikwa	Timeout	-	51.254.49.253
Israel, Netanja	Timeout	-	51.254.49.253
India, New Delhi	Timeout	-	51.254.49.253
Iceland, Reykjavik (Miðborg)	Timeout	-	51.254.49.253
Italy, Como	Timeout	-	51.254.49.253
Kuwait, Kuwait City	UDP checks unavailable: SOCKS5 proxy does not support UDP ASSOCIATE	-	fr-gra-ovh.check-host.eu
Lithuania, Pilaite	Timeout	-	51.254.49.253
Latvia, Riga	Timeout	-	51.254.49.253
Moldova, Chisinau	Timeout	-	51.254.49.253
Netherlands, Amsterdam	Timeout	-	51.254.49.253
Netherlands, Amsterdam	Timeout	-	51.254.49.253
Netherlands, Amsterdam	Timeout	-	51.254.49.253
Netherlands, Amsterdam	Timeout	-	51.254.49.253
Norway, Oslo	Timeout	-	51.254.49.253
Poland, Warsaw	Timeout	-	51.254.49.253
Romania, Bacău	Timeout	-	51.254.49.253
Romania, Bucharest	Timeout	-	51.254.49.253
Serbia, Belgrade	Timeout	-	51.254.49.253
Russia, St Petersburg	Timeout	-	51.254.49.253
Singapore, Singapore	Timeout	-	51.254.49.253
Turkey, Istanbul	Timeout	-	51.254.49.253
Taiwan, Taipei	Timeout	-	51.254.49.253
United States, Miami	Timeout	-	51.254.49.253
United States, Dallas	Timeout	-	51.254.49.253
United States, Kansas City	Timeout	-	51.254.49.253
United States, Dallas	Timeout	-	51.254.49.253
South Africa, Johannesburg	Timeout	-	51.254.49.253