Check Your NAT Type Instantly
Free online tool to detect your NAT type for gaming (PS5, Xbox, PC) and understand your network connectivity
NAT Type Comparison
| NAT Type | Gaming | VoIP | P2P | PS5 | Xbox | Switch |
|---|---|---|---|---|---|---|
| Open Internet | Excellent | Excellent | Excellent | Type 1 | Open | Type A |
| Full Cone NAT | Excellent | Excellent | Excellent | Type 1 | Open | Type A |
| Restricted Cone NAT | Good | Good | Moderate | Type 2 | Moderate | Type A |
| Port-Restricted Cone NAT | Moderate | Moderate | Poor | Type 2 | Moderate | Type B |
| Symmetric NAT | Poor | Poor | Blocked | Type 3 | Strict | Type C–D |
| Blocked | Poor | Poor | Blocked | Type 3 / Failed | Strict / Unavailable | Type F |
Platform Guides
Learn how to check and improve NAT type on your device
Why Choose Us
Built for gamers and everyday users who want clear, reliable network diagnostics with no setup or sign-up.
Server-assisted NAT classification based on real connection behavior.
Live progress and a 20-second overall timeout keep the test quick.
Detects IPv4 NAT type and reports IPv6 availability plus the result of an external WebRTC/UDP connectivity check.
No accounts or paywalls—just run the test.
Works worldwide with globally reachable infrastructure.
Understanding NAT Types and Their Impact on Online Connectivity
Network Address Translation (NAT) is a fundamental part of how most modern networks connect to the internet. It allows multiple devices on a local network to share a single public IP address, conserving IPv4 resources and adding a layer of isolation between internal devices and external networks.
While NAT works transparently for everyday browsing, it plays a much more visible role when applications require direct or semi-direct connections between users. This is especially true for online gaming, voice chat, video calls, and peer-to-peer (P2P) services.
Understanding your NAT type helps explain why some connections work smoothly while others fail or fall back to slower relay paths.
Why NAT Behavior Matters More Than Internet Speed
Connection problems are often blamed on low bandwidth or a weak signal. In reality, a fast internet connection alone does not guarantee reliable real-time connectivity.
NAT controls how inbound traffic is handled and whether external devices can reach your system after an outbound connection is established. If your network restricts incoming responses too aggressively, applications that rely on peer-to-peer communication may struggle to establish or maintain direct connections.
Two users with similar internet speeds can therefore have very different experiences in online games or voice chat—often because of NAT behavior rather than raw bandwidth.
Common NAT Types and What They Mean in Practice
Different networks implement NAT in different ways. These behaviors are commonly grouped into several categories:
This configuration allows external hosts to reach your device once an outbound connection has been made. It provides the fewest restrictions and typically delivers the best experience for gaming and real-time communication.
Incoming connections are limited to external IP addresses that the device has previously contacted. Most applications still function, but some matchmaking or connection attempts may take longer.
Similar to Restricted Cone NAT, but incoming traffic must match both the external IP address and port. This creates more compatibility issues for some P2P applications.
A different external mapping may be used for each destination, while inbound traffic is heavily restricted. This is the most limiting configuration and often prevents direct peer-to-peer connections entirely.
How NAT Type Affects Gaming and Real-Time Applications
Online multiplayer games, voice chat systems, and conferencing tools often attempt to establish direct connections between players or participants to reduce latency and improve quality.
When restrictive NAT prevents a direct connection, traffic may be routed through a relay server. Communication can continue, but the relay may introduce:
In competitive or fast-paced environments, these effects can significantly impact the user experience.
NAT Challenges in Home and ISP Networks
Several common network setups can influence NAT behavior:
When two routers perform NAT, connection rules become more restrictive and harder to manage.
Without automatic port management, applications may not receive the inbound access they expect.
Some internet service providers place customers behind shared NAT infrastructure, limiting inbound connectivity regardless of local router settings.
Aggressive filtering can unintentionally block legitimate inbound traffic or responses.
Identifying your NAT type is the first step in determining whether these factors are affecting your network. Read the CGNAT check guide
Why Detecting NAT Type Is Useful
Knowing your NAT type provides clarity. It helps answer questions such as:
Designed for Clarity, Not Complexity
NAT Checker measures observable network behavior instead of inferring results from router settings. It provides clear, practical results without downloads, an account, or device permissions.
The test uses little data and reports results quickly, so you can check connectivity without disrupting normal use.
A Practical Tool for Everyday Users
Whether you are troubleshooting a game, diagnosing voice chat, or simply learning how your network behaves, your NAT type provides useful context. NAT Checker makes that behavior easier to interpret so you can make better decisions about router settings, hardware, and internet service.