Check-Host.cc

Advanced Options (Custom Payload)

If left empty, the system will automatically inject a standardized probe for known ports (DNS, NTP, SNMP, Source Engine, etc.).

Info Ping HTTP TCP UDP MTR DNS

Check UDP nl-eyg-ghosted.check-host.eu:80

Permanent link |
Location Result Time IP Address
AL Albania, Tirana
AU Australia, Sydney
BA Bosnia and Herzegovina, Novi Travnik
BG Bulgaria, Sofia
CA Canada, Montreal
CH Switzerland, Bern
CL Chile, Santiago
CN China, Hohhot
DE Germany, Nuernberg
DE Germany, Frankfurt am Main
DE Germany, Frankfurt am Main
DE Germany, Limburg
DK Denmark, Glostrup Municipality
ES Spain, Madrid
FI Finland, Helsinki
FI Finland, Helsinki
FR France, Gravelines
FR France, Paris
GB United Kingdom, London
HK Hong Kong, Hong Kong
HR Croatia, Zagreb
HU Hungary, Budapest
ID Indonesia, Jakarta
IN India, New Delhi
IS Iceland, Reykjavik (Miðborg)
IT Italy, Como
LT Lithuania, Pilaite
LV Latvia, Riga
MD Moldova, Chisinau
NL Netherlands, Amsterdam
NL Netherlands, Amsterdam
NL Netherlands, Amsterdam
NL Netherlands, Eygelshoven
QA Qatar, Doha
RO Romania, Bacău
RO Romania, Bucharest
RS Serbia, Belgrade
SG Singapore, Singapore
TW Taiwan, Taipei
US United States, Miami
US United States, Dallas
US United States, Kansas City

Global UDP Port Checker & Payload Injector

The Check-Host UDP port checker allows network administrators and developers to test the reachability of connectionless transport layer protocols. Unlike TCP, the User Datagram Protocol (UDP) does not establish a dedicated handshake. It simply transmits packets (datagrams) directly to the target, making it exceptionally fast but inherently unreliable. This tool verifies if your edge network is properly receiving and processing these stateless payloads across more than 50 geographic nodes.

Stateless Routing & Payload Injection

Because UDP lacks a formal acknowledgment mechanism (like a TCP SYN-ACK), a standard empty packet will typically yield no response from the server, even if the port is open. To definitively prove a UDP port is active, our engine automatically injects application-specific hexadecimal payloads—such as a standard DNS query for port 53, or an NTP version request for port 123—to force the target application to reply.

Firewall & DDoS Mitigation Testing

UDP is the primary vector for massive volumetric DDoS attacks (like NTP or DNS amplification). Consequently, modern cloud firewalls and ISP scrubbing centers often deploy aggressive UDP rate-limiting or outright protocol drops. Utilizing a globally distributed UDP test helps security engineers confirm that legitimate traffic is bypassing the firewall rules correctly without triggering false-positive DDoS mitigation filters.

Gaming, VoIP, and Streaming Analysis

Real-time applications such as multiplayer game servers (Source Engine, Unreal), VoIP communications (SIP/RTP), and live video streaming rely almost exclusively on UDP to minimize latency. Dropped UDP packets manifest as voice jitter or game lag. Our Live UDP Check allows you to continuously monitor a target over a 60-second window, plotting latency spikes and packet loss on a real-time chart to diagnose transient network instability.