Dubrovnik, Croatia: no other cable lands within 50 km.
On an island this means losing the submarine link; on the mainland traffic can still go over land.
No alerts from our monitoring on this cable in the last 180 days. Events feed →
Counted: other international cables landing in the same country (domestic cables between points of one country are not a way out), other cables at landing points within 50 km, and whether the country has land links. Not counted: cable capacity, operator contracts and satellite. Use as a first look at dependence, not as a statement of what would happen.
Live Performance
942
measurements
15
probes
225
days monitored
76.1
ms avg RTT
1
anomalies
Monitored from 2026-03-07 through 2026-10-18 - live ICMP round-trip time measurements via our monitoring probes. All values below are recomputed daily from raw probe data.
Measurement sources
Probe
Location
Samples
Avg
Min-Max
Last seen
#11779
control probe
205
15.8 ms
14.5-63.9
2026-09-15
#652
control probe
160
90.0 ms
51.2-194.7
2026-09-29
#2851
control probe
140
77.5 ms
42.2-214.4
2026-09-30
#17554
control probe
97
21.8 ms
19.9-85.9
2026-10-18
#6427 own probe
Sydney AU
96
277.5 ms
240.8-770.6
2026-09-28
own probe
Odessa UA
94
59.6 ms
44.1-80.6
2026-09-28
own probe
Sevastopol UA
70
85.4 ms
68.9-205.7
2026-09-28
#7529
control probe
36
20.8 ms
19.8-28.3
2026-07-02
own probe
Kyiv UA
28
37.9 ms
26.6-56.0
2026-09-12
#20262
control probe
3
41.7 ms
41.1-42.8
2026-03-10
own probe
Minsk BY
3
76.4 ms
76.1-76.8
2026-04-14
own probe
Almaty KZ
3
103.6 ms
103.5-103.7
2026-04-14
own probe
Tbilisi GE
3
55.9 ms
55.9-55.9
2026-04-14
own probe
Jerusalem IL
3
74.1 ms
73.8-74.7
2026-04-14
#14628
control probe
1
52.5 ms
52.5-52.5
2026-09-18
About the Adria-1 Cable System
Adria-1: A regional submarine cable linking Greece, Croatia, and Albania
Adria-1 is a submarine telecommunications cable that spans approximately 440 kilometers, connecting three landing points: Corfu in Greece, Dubrovnik in Croatia, and Durres in Albania. Operational since 1996, according to GeoCables data, it is owned jointly by ALBtelecom and Hrvatski Telekom. The cable serves as a regional link within the Adriatic Sea, facilitating communication and data transfer between these countries.
What stands out about Adria-1 is the limited publicly available information regarding its technical specifications, such as design capacity, fiber count, and supplier details. Additionally, live latency measurements from remote probes reveal significant differences between theoretical propagation times and real-world internet performance, offering insight into the broader network dynamics and infrastructure challenges.
Adria-1 connects three strategic locations along the Adriatic Sea. Its southernmost landing point is Corfu, a Greek island known for its historical significance and proximity to Albania. The cable crosses the Adriatic to land in Durres, Albania's primary port city and an important economic hub. Finally, it reaches Dubrovnik, Croatia, a UNESCO World Heritage site and a growing regional center for telecommunications. This corridor provides connectivity between southeastern Europe and the Mediterranean.
Why it was built and what it carries
Adria-1 was likely built to enhance regional connectivity in southeastern Europe, where terrestrial infrastructure faces challenges due to mountainous terrain and geopolitical considerations. By linking Greece, Albania, and Croatia, the cable facilitates international telecommunications, including voice, data, and internet services. Its role may also include supporting cross-border business, tourism, and government communications. However, specific details about the cable's traffic volumes and utilization rates are not publicly disclosed.
History: what can be established
GeoCables records Adria-1's ready-for-service year as 1996, but no alternative dates have been surfaced from industry sources to challenge this. The cable's ownership by ALBtelecom and Hrvatski Telekom suggests it was developed as a cooperative effort to meet regional connectivity needs. Its continued operation as of 2023 indicates that it has been maintained and upgraded sufficiently to remain viable, though details about its maintenance history or any major repairs are not publicly available.
Capacity and technology
Publicly available information does not disclose Adria-1's design capacity, fiber pairs, or supplier. Without operator documentation, it cannot be stated whether the cable has been upgraded to support modern high-capacity technologies such as wavelength-division multiplexing (WDM). Given its age, it is plausible that the cable has undergone retrofits to remain competitive, but attributing specific technological advancements without evidence would be speculative.
Latency: the physics
Theoretically, light traveling one way through Adria-1's 440 km fiber would take approximately 2.2 milliseconds, with a round-trip time (RTT) floor of 4.3 milliseconds. However, live latency measurements from remote probes show significantly higher values:
Corfu to Dubrovnik: minimum 14.6 ms, average 57.2 ms
Dubrovnik to Corfu: minimum 41.1 ms, average 87.4 ms
Odessa to Dubrovnik: minimum 54.2 ms, average 63.3 ms
Sydney to Dubrovnik: minimum 240.8 ms, average 242.0 ms
These discrepancies arise from additional factors such as land-based network tails, routing inefficiencies, and terminal equipment delays. The data underscores the difference between theoretical cable latency and real-world internet performance.
Redundancy: what happens if it breaks
In the event of a failure, redundancy for Adria-1's corridor is partially provided by the Italy-Albania cable, which also lands at Durres. This alternative route could mitigate disruptions to Albania's connectivity but would not cover the full geographic scope of Adria-1. Repair logistics for submarine cables typically involve deploying specialized cable ships to locate, retrieve, and repair the damaged segment, a process that can take weeks depending on the fault's severity and location.
Bottom line
Adria-1 is a 440 km submarine cable connecting Corfu, Dubrovnik, and Durres.
Operational since 1996, owned by ALBtelecom and Hrvatski Telekom.
Technical specifications such as design capacity and fiber pairs are not publicly disclosed.
Live latency measurements reveal significant differences from theoretical propagation times.
Redundancy is partially provided by the Italy-Albania cable.