Landing Point · FR France
| Cable | Status |
|---|---|
| Circe South | Active |
| Q&E South | Active |
RTT measurements to this landing point from 2026-03-02 through 2026-05-22 — live ICMP round-trip time via RIPE Atlas probes. Recomputed daily. ✓ No anomalies detected in the monitored period.
| Probe | Location | Samples | Avg |
|---|---|---|---|
| #14934 | RIPE Atlas | 45 | 63.7 ms |
| #50043 | RIPE Atlas | 20 | 22.1 ms |
| #1014473 own probe | Minsk BY | 10 | 50.6 ms |
| #1014597 own probe | Tbilisi GE | 10 | 70.1 ms |
| #1014589 own probe | Almaty KZ | 9 | 129.3 ms |
| #1014969 own probe | Jerusalem IL | 6 | 77.6 ms |
| #1015523 own probe | Moscow RU | 2 | 57.1 ms |
Cayeux-sur-Mer sits on the English Channel coast of northern France, in the Somme department of Hauts-de-France, at coordinates 50.178809°N, 1.493433°E. The town is a small seaside community on the broad pebble beach south of the Somme estuary. For submarine cable infrastructure, Cayeux-sur-Mer serves a specific structural role: it is one of the historic France-side landing points for short Channel crossings to England, hosting two cables — one operational since 1999 and a second planned for ready-for-service in 2026.
Both cables here cross the English Channel to landings on the south coast of England (Pevensey Bay and Newhaven). Cayeux-sur-Mer is therefore a focused short-haul cable landing rather than a transit hub — the cables here move traffic between England and France over distances of 115-141 km, well under typical international cable lengths. The two systems give the France-UK cross-Channel route diverse landings, complementing the older France-UK cables that land further west at sites such as Lannion.
Circe South is a 115 km submarine cable in service since 1999, jointly owned by Zayo and euNetworks. It crosses the English Channel between Cayeux-sur-Mer and Pevensey Bay on the East Sussex coast of England. Circe South was deployed as part of the late-1990s carrier-neutral fibre buildout in Western Europe, providing alternative carrier capacity on the France-UK route outside of the incumbent operators' historic cables.
Q&E South is a 141 km submarine cable scheduled for ready-for-service in 2026, owned by euNetworks. It will land at Newhaven on the East Sussex coast, slightly west of the Pevensey Bay Circe South landing. The cable's deployment by euNetworks alone (after co-owning Circe South with Zayo) reflects both the operator's expansion of its France-UK route portfolio and growing UK-EU bandwidth demand driving fresh cross-Channel infrastructure investment.
Once Q&E South enters service in 2026, Cayeux-sur-Mer will have two cables to two different east-Sussex landings (Pevensey Bay via Circe South, Newhaven via Q&E South). This gives the France-UK route at this location landing-end diversity in the UK, even though both cables originate from a single France landing. A fault at either UK landing affects only one cable; a fault at Cayeux-sur-Mer, however, affects both.
The two cables share euNetworks as common ownership (Circe South co-owned with Zayo; Q&E South solely owned by euNetworks), which reduces operator diversity. For traffic requiring strict operator-level diversity, alternative France-UK cables landing at other French sites would be needed. As pure capacity additions, however, the deployment of Q&E South substantially raises the available France-UK bandwidth at this landing cluster.
The Cayeux-sur-Mer submarine cable landing sits at 50.178809°N, 1.493433°E (50°10'44"N, 1°29'36"E), on the English Channel coast in the Somme department of northern France. The location's broad pebble beach with relatively gentle offshore gradient provides a cable-friendly approach corridor, contrasting with the steeper chalk-cliff topography of the English landings on the opposite side of the Channel.
Two submarine cables involve Cayeux-sur-Mer: Circe South (115 km, RFS 1999, Zayo + euNetworks, to Pevensey Bay UK) and Q&E South (141 km, planned RFS 2026, euNetworks, to Newhaven UK).
The Cayeux-sur-Mer cable landing is at 50.178809°N, 1.493433°E (50°10'44"N, 1°29'36"E), on the English Channel coast in the Somme department of northern France.
From Cayeux-sur-Mer, French fibre connects to the United Kingdom — both cables here land in East Sussex (Pevensey Bay via Circe South, Newhaven via the planned Q&E South).
The earliest documented Cayeux-sur-Mer landing in the GeoCables dataset is Circe South, in service since 1999. Q&E South will follow in 2026.
Circe South is jointly owned by Zayo and euNetworks. Q&E South will be solely owned by euNetworks. The two cables share euNetworks as common operator.
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