# Amsterdam, Netherlands → Marseille, France RTT

🇳🇱 **Amsterdam, Netherlands (AMS)** → 🇫🇷 **Marseille, France (MRS)**

Measurement round: `2026-08-16T04:07:28Z`.

In the 2026-08-16T04:07:28Z round, the Amsterdam–Marseille path returned an average ICMP echo RTT of 19.6 ms across 50 samples, with a minimum of 19.03 ms, a maximum of 20.95 ms, and zero packet loss. Standard deviation was 0.5 ms and jitter 0.41 ms, so the path was consistently tight.

The 1,009.9 km geodesic separation has a theoretical fiber floor near 9.89 ms; the observed RTT lands about 1.98x above that floor, implying 50.5% fiber efficiency. This is a reasonable directness result for a route terminating at Marseille's Mediterranean cable-landing ecosystem, where subsea systems add last-mile context without necessarily inflating spread.

This route ranked 5th among the 19 routes in the same round, while its relative variability of about 2.6% of the average sat below the 3.28% median variability recorded across routes. For operators watching Amsterdam-to-Marseille reachability, the combination of no loss, sub-millisecond jitter, and stable RTT is the headline.

## Latency Summary

| Metric               | Value                                          |
| -------------------- | ---------------------------------------------- |
| RTT                  | **19.6 ms**                                    |
| Jitter               | **0.41 ms**                                    |
| Packet Loss          | **0%**                                         |
| Standard Fiber Floor | **9.89 ms**                                    |
| Fiber Efficiency     | **50.5%**                                      |
| Latency Tier         | Ultra-Low                                      |
| Source Region        | [Europe](/docs/network/latency/regions/europe) |
| Destination Region   | [Europe](/docs/network/latency/regions/europe) |

## Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

## Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See [About This Measurement](#about-this-measurement) for citation guidance.

## Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for [Amsterdam](https://www.geonames.org/2759794) (52.37403, 4.88969) and [Marseille](https://www.geonames.org/2995469) (43.29695, 5.38107). It does not disclose either facility address.

| Physical Reference                            | Value          |
| --------------------------------------------- | -------------- |
| WGS-84 geodesic distance                      | **1,009.9 km** |
| Vacuum RTT floor                              | **6.74 ms**    |
| Standard fiber RTT floor ($n_g=1.4679$)       | **9.89 ms**    |
| Low-latency fiber material floor              | **9.85 ms**    |
| Engineering floor (5% path allowance)         | **10.39 ms**   |
| Research 1.33× mapped-fiber reference         | **13.15 ms**   |
| Estimated unamplified path loss               | **212.1 dB**   |
| Transparent optical spans / inline amplifiers | **14 / 13**    |
| Published RTT inflation over fiber floor      | **1.98×**      |

Attenuation is used to estimate the number of 80 km optical spans; it does not directly slow light. See the full [theoretical fiber latency, GeoNames, attenuation, and amplifier methodology](/docs/network/latency/theoretical-fiber-latency).

## Stability & Trend

The current measurement round (2026-08-16T04:07:28Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

| Round Statistic    | Value        |
| ------------------ | ------------ |
| Minimum RTT        | **19.03 ms** |
| Average RTT        | **19.6 ms**  |
| Maximum RTT        | **20.95 ms** |
| Standard deviation | **0.5 ms**   |
| Stdev / average    | **2.6%**     |

## Route Context

* Departure PoP: [Amsterdam (AMS)](/docs/network/latency/ams-amsterdam)
* Destination PoP: [Marseille (MRS)](/docs/network/latency/mrs-marseille)
* Region overview: [Europe](/docs/network/latency/regions/europe) → [Europe](/docs/network/latency/regions/europe)
* Full global matrix: [Backbone Latency Matrix](/docs/network/latency)
* Physical methodology: [Theoretical Fiber Latency](/docs/network/latency/theoretical-fiber-latency)

## Related City-Pair Routes

**Reverse direction**

* [Marseille to Amsterdam latency and RTT](/docs/network/latency/pairs/mrs-ams-rtt) — 20.3 ms

**Fastest routes departing Amsterdam (AMS)**

* [Amsterdam to London latency and RTT](/docs/network/latency/pairs/ams-lon-rtt) — 5.2 ms
* [Amsterdam to Frankfurt latency and RTT](/docs/network/latency/pairs/ams-fra-rtt) — 5.9 ms
* [Amsterdam to Paris latency and RTT](/docs/network/latency/pairs/ams-par-rtt) — 7 ms
* [Amsterdam to Berlin latency and RTT](/docs/network/latency/pairs/ams-ber-rtt) — 7.2 ms
* [Amsterdam to Moscow latency and RTT](/docs/network/latency/pairs/ams-mow-rtt) — 38.1 ms

**Fastest routes arriving at Marseille (MRS)**

* [Paris to Marseille latency and RTT](/docs/network/latency/pairs/par-mrs-rtt) — 8.9 ms
* [Frankfurt to Marseille latency and RTT](/docs/network/latency/pairs/fra-mrs-rtt) — 16.4 ms
* [London to Marseille latency and RTT](/docs/network/latency/pairs/lon-mrs-rtt) — 17.9 ms
* [Berlin to Marseille latency and RTT](/docs/network/latency/pairs/ber-mrs-rtt) — 20.2 ms
* [Moscow to Marseille latency and RTT](/docs/network/latency/pairs/mow-mrs-rtt) — 49.9 ms

**Same corridor (Europe → Europe)**

* [London to Amsterdam latency and RTT](/docs/network/latency/pairs/lon-ams-rtt) — 5.2 ms
* [Frankfurt to Amsterdam latency and RTT](/docs/network/latency/pairs/fra-ams-rtt) — 5.9 ms
* [Berlin to Frankfurt latency and RTT](/docs/network/latency/pairs/ber-fra-rtt) — 6.1 ms

## About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under **CC BY 4.0** in the [Hats Network latency dataset](/opendata/latency/). Per-pair files are available at `/opendata/latency/latest/pairs/ams-mrs.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Amsterdam → Marseille round 2026-08-16T04:07:28Z, CC BY 4.0".

***

*Data auto-generated on August 16, 2026. Explore the [full interactive latency matrix](/docs/network/latency) or browse more [city-pair routes](/docs/network/latency/pairs).*

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## License and attribution

- **Canonical source:** [View the human-readable HTML page](https://hatsnet.io/docs/network/latency/pairs/ams-mrs-rtt).
- **Original documentation:** © Hats Network Inc., licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/).
- **Public latency data:** © Hats Network Inc., licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
- **Full terms:** [Content and Data License](https://hatsnet.io/docs/legal/content-and-data-license) — includes attribution requirements, third-party material, trademarks, source code and other exclusions.