Probe the internet. Run ICMP, TCP, HTTP, DNS, and MTR tests from multiple probes at once — and watch latency, loss, and routing stream in live, per probe.
We're now opening PacketStream Pulse, the network probing tool we previously used only internally, to everyone. Anyone can reach Korean probes and test their network with ease.
What Is PacketStream Pulse?
Pulse runs network tests from many probes simultaneously and visualizes the results in real time. Unlike a ping from a single point, it lets you compare — at a glance — how a destination looks from multiple locations and multiple carriers.
- Simultaneous measurement across multiple probes
- Latency, loss, and routing streamed live, per probe
- Multiple test types: ICMP, TCP, HTTP, DNS, and MTR
Born From Our Internal Monitoring
Pulse isn't a tool we threw together for marketing. It's what PacketStream built and uses every day to run uptime monitoring and routing-path optimization for real production infrastructure.
We use it to continuously observe quality across our global backbone and major Korean carrier segments, to detect path anomalies and latency spikes early, and to keep tuning our routing. In other words, it's a tool already proven in real operations.
There Was No Easy Way to Measure Per-Carrier Latency in Korea
In Korea, there has been practically no public service for easily checking latency by carrier (ISP). It has been hard for outside users to objectively diagnose problems like "our server is fast on KT but slow on LG."
For workloads where per-carrier path quality drives perceived performance — game servers, real-time services, VPNs — that gap has been especially painful.
Four Major Korean Carrier Probes
PacketStream built its own probe infrastructure so that tests can run from all four major Korean carriers — KT, SK, LG U+, and an LG U+ residential line.
Because it includes not just backbone networks but also a real residential line perspective, it measures closer to the path quality end users actually experience. This infrastructure has powered PacketStream's internal uptime monitoring and route optimization — and now part of it is open to the public.
What You Can Test
Pulse offers five test types depending on your goal.
- ICMP — echo round-trip latency and loss
- TCP — handshake reachability to a specific port
- HTTP — per-stage request timing breakdown
- DNS — resolver query responses and records
- MTR — per-hop path and segment-by-segment latency analysis
Each test runs simultaneously on the probes you select, with results streaming live, per probe.
Now Open to Everyone, for Free
PacketStream Pulse is free and open. Just choose a target host and probes, then run the test. The tool is protected by Cloudflare Turnstile so anyone can use it freely — and without abuse.
We want more people to enjoy the advantages we've had internally. Whether you're a developer working with Korean networks, a game or hosting operator, or simply curious about per-carrier quality, we hope Pulse proves genuinely useful.
Try it now at PacketStream Pulse.