Landing Point · GR Greece
| Cable | Status |
|---|---|
| Cyclades A | Active |
| Thetis | Active |
RTT measurements to this landing point from 2026-03-25 through 2026-06-11 — live ICMP round-trip time via RIPE Atlas probes. Recomputed daily. ✓ No anomalies detected in the monitored period.
| Probe | Location | Samples | Avg |
|---|---|---|---|
| #1014969 own probe | Jerusalem IL | 5 | 101.3 ms |
| #1014473 own probe | Minsk BY | 4 | 51.2 ms |
| #1014589 own probe | Almaty KZ | 4 | 109.0 ms |
| #1014597 own probe | Tbilisi GE | 4 | 80.3 ms |
| #1015313 own probe | Sevastopol UA | 2 | 87.4 ms |
| #1015523 own probe | Moscow RU | 2 | 60.2 ms |
| #6410 own probe | Sao Paulo BR | 1 | 229.7 ms |
| #6427 own probe | Sydney AU | 1 | 265.5 ms |
| #1015932 own probe | Odessa UA | 1 | 97.1 ms |
| #1015984 own probe | Balancer IL | 1 | 100.8 ms |
Ermoupoli is a town on the island of Syros in the Cyclades, Greece, and serves as the capital of the South Aegean region. As an island settlement in the Aegean Sea, it is connected to the broader Greek telecommunications network through submarine cable infrastructure. Two submarine cables land at Ermoupoli, linking it within a domestic Greek corridor that serves the wider Cyclades island group and the Greek mainland.
Both cables landing at Ermoupoli connect exclusively to other points within Greece, making this landing point part of an intra-national submarine cable network rather than an intercontinental hub. The cables — Thetis and Cyclades A — together represent a focused island connectivity function, supporting communications between Syros and other Greek destinations across the Aegean.
Thetis is a submarine cable with a length of 660 km, reaching ready-for-service status in 2022 on a draft basis. It connects landing points within Greece, extending Ermoupoli's reach across a domestic Aegean corridor. With a length of 660 km, Thetis is the longer of the two cables landing at Ermoupoli.
Cyclades A is a submarine cable measuring 222 km in length, with a ready-for-service year of 2018 on a draft basis. Like Thetis, it connects to other landing points within Greece, serving the inter-island connectivity needs of the Cyclades region. Its shorter length reflects a more localised routing within the Greek island network.
Among the 36 submarine cable landing points in Greece, Ermoupoli ranks alongside Aethos as a two-cable landing point, placing it in the upper 86 percent of Greek landing points by cable count. It sits below larger hubs such as Chania, Athens, and Tympaki — which host four or five cables each — and is comparable in scale to Aethos, which also lands two cables. Mykonos and Naousa, each with three cables, represent the tier immediately above Ermoupoli in the domestic hierarchy.
Ermoupoli functions as a two-cable domestic landing point, serving intra-Greek connectivity through the Thetis and Cyclades A systems. Both cables operate within Greece's national submarine network, enabling island-to-island and island-to-mainland communications across the Aegean. The combination of a longer-range cable (Thetis at 660 km) and a shorter, more localised cable (Cyclades A at 222 km) suggests that Ermoupoli on Syros serves both broader domestic routing and closer regional inter-island links.
As a node in Greece's distributed network of 36 landing points spanning 20 submarine cables, Ermoupoli on Syros contributes to the country's domestic island connectivity fabric, ensuring that Syros and the surrounding Cyclades remain integrated with the national telecommunications network.
View actual submarine cable routing from Ermoupoli, Greece — with backbone nodes, distance calculations, and latency estimates
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