RDEM Systems NTP Infrastructure

Active Pool Member

Mission-critical time synchronization for professional and industrial environments.

Time certified by our infrastructure

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View our reliability score on the official NTP Pool

Check your machine's time

NTP Pool Expertise:
Our public servers contribute to the global NTP pool to ensure the "cleanliness" of the network. On our AS206014 network, we maintain a high-precision infrastructure (Stratum 1 & 2) under continuous monitoring. As of January 10, 2026, there are 366 servers in the French pool; we contribute around ten of them.

We also offer dedicated NTP architectures, integrated and operated as part of our managed services.

Learn more about our NTP server hosting →

Understanding NTP and NTS

How your devices stay on time without any intervention.

Read → Securing with NTS

Cryptographic authentication for your time source.

Read → TOTP and NTP: Your 2FA Codes

Why Google Authenticator depends on an accurate clock.

Read → Stratum 1 Server

Raspberry Pi + GPS: our master time source.

Read → FAQ

Answers to frequently asked questions about NTP and NTS.

Read → Contributing to the Pool

Why and how to participate in the global NTP pool.

Read →

Available Domains

Our servers respond on 8 different domains. You can mix TLDs according to your preferences:

            rdem-systems.{be, biz, com, eu, fr, info, net, org}
        

Examples: ntp1.rdem-systems.fr, ntp5.rdem-systems.eu, ntp-pool.rdem-systems.net, etc.

Check Your Machine's Synchronization

Test whether your system is correctly synchronized with our Stratum 1 NTP reference:

Method 1: Via web browser
Test in browser →

Method 2: Via command line (CLI)

                
                curl -sL https://ntp.rdem-systems.com/ntp-check.sh | bash
            

What is it used for?

Virtualization: Proxmox clusters and High Availability (HA). Host NTP on a Proxmox VM →

Monitoring: Log consistency and event timestamping.

Industry: Industrial environments and embedded systems.

Compliance: Systems subject to traceability requirements.

Diagnostics: Online NTP testing tools we have referenced: check-ntp.net · ntp-tester.eu

Server Configuration

Add our servers to your configuration for increased redundancy.

Stratum 1: Master server using a GNSS source (GPS/Galileo) with PPS signal for near-zero drift.

Discover our Stratum 1 Raspberry Pi + GPS server →

Public NTP Server List (Stratum 2)

ntp-0.hq.rdem-systems.com (S1)

ntp1.rdem-systems.com

ntp2.rdem-systems.com

ntp3.rdem-systems.com

ntp4.rdem-systems.com

ntp5.rdem-systems.com

ntp6.rdem-systems.com

ntp7.rdem-systems.com

ntp8.rdem-systems.com

ntp9.rdem-systems.com

ntp10.rdem-systems.com

ntp11.rdem-systems.com

Free NTP Synchronization Guide

Download our whitepaper: "Time Synchronization Best Practices for Windows & Linux"

✓ Complete w32tm configuration for Active Directory
✓ Chrony vs ntpd: which to choose
✓ Firewall rules and network architecture
✓ Troubleshooting Stratum 16 and false tickers

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Discover our Managed Services Need a dedicated architecture? Contact us