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Tumon Bay, Guam

Landing Point · GU Guam

2 Connected Cables 13.5136°N 144.8006°E Guam
2
Connected Cables
GU
Country
13.51°
Latitude
144.80°
Longitude
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Connected Cables

Cable Length RFS Status
Australia-Japan Cable (AJC) 12,700 km 2001 Active
Guam Okinawa Kyushu Incheon (GOKI) 4,244 km 2013 Active

Live Performance

4,332
measurements
22
probes
184
days monitored
284.0
ms avg RTT
2
anomalies

RTT measurements to this landing point from 2026-04-12 through 2026-10-14 - live ICMP round-trip time via our monitoring probes. Recomputed daily.

Measurement sources

Probe Location Samples Avg Min-Max Last seen
#34380 control probe 383 120.7 ms 49.4-254.1 2026-10-14
#6410 own probe Sao Paulo BR 311 293.7 ms 278.8-395.4 2026-10-14
#6427 own probe Sydney AU 310 139.0 ms 71.0-373.3 2026-10-14
own probe Almaty KZ 250 349.1 ms 336.0-374.8 2026-10-14
own probe Minsk BY 249 286.2 ms 282.4-414.1 2026-10-14
own probe Tbilisi GE 241 317.8 ms 300.6-398.2 2026-10-14
#7062 own probe Cape Town ZA 240 394.3 ms 317.5-492.6 2026-10-14
own probe Jerusalem IL 230 310.8 ms 97.3-344.3 2026-10-14
own probe Moscow RU 228 289.1 ms 280.5-355.6 2026-10-14
own probe Rostov RU 220 317.1 ms 301.9-516.0 2026-10-14
own probe Balancer IL 218 315.1 ms 98.2-330.7 2026-10-14
own probe Saint Petersburg RU 205 285.1 ms 80.6-394.2 2026-10-14
own probe Sevastopol UA 194 329.0 ms 81.2-771.1 2026-10-14
own probe Kyiv UA 192 286.0 ms 80.9-300.1 2026-10-14
#6568 own probe Singapore SG 189 336.1 ms 327.6-520.1 2026-10-14
own probe Odessa UA 188 308.8 ms 98.7-390.1 2026-10-14
own probe DVM IL 182 318.4 ms 306.2-337.4 2026-10-14
own probe Ekaterinburg RU 181 324.0 ms 306.1-416.1 2026-10-14
#6487 control probe 118 242.4 ms 66.0-356.1 2026-07-30
#329 control probe 1 147.2 ms 147.2-147.2 2026-07-30

About Tumon Bay, Guam

M4.9 earthquake · 119 km SSW of Merizo Village, Guam
Event illustration: M4.9 earthquake · 119 km SSW of Merizo Village, Guam · Oct 2026 · GeoCables event feed

Tumon Bay, Guam is a submarine cable landing point in Guam (coordinates 13.5136°, 144.8006°). It serves 2 submarine cable systems, making it a multi-cable landing site in Guam's international connectivity infrastructure.

Tumon Bay is a bay in the United States territory of Guam, opening to the Philippine Sea. It is bounded to the north by Two Lovers Point and to the south by Ypao Point. The entirety of the bay falls within the Tumon Bay Marine Preserve, also known as the Tumon Bay Marine Preserve Area (MPA) and Tumon Preserve, one of five marine preserves on Guam. The Preserve measures 4.54 square kilometers and is roughly two miles long. The platform of the fringing reef that separates the open ocean from the lagoon is up to 1,450 feet (440 m) wide. and up to one mile from the shore. The bay is located off of the Tumon area, the tourist center of the island, in the village of Tamuning. The bay is extensively utilized for recreation and fishing. Wikipedia

Connected submarine cables

CableRFSLengthOwners
Guam Okinawa Kyushu Incheon (GOKI)20134,244 kmAT&T
Australia-Japan Cable (AJC)200112,700 kmAT&T, NTT, Softbank, …

Operators landing at Tumon Bay, Guam

Cables landing at Tumon Bay, Guam are operated by 5 distinct consortium partners and carriers, including AT&T, NTT, Softbank, Telstra, Verizon. Each cable is typically jointly owned by a consortium of tier-one carriers and hyperscale operators who share construction costs and capacity; the operator mix reflects both regional incumbents and global players with interest in the routes served by this landing point.

Connectivity profile

From Tumon Bay, Guam, international traffic can reach 3 countries through 2 cable systems. Destinations include Australia, Guam, Japan.

Monitoring status

No monitoring incidents were recorded on cables serving Tumon Bay, Guam in the past 90 days - all connected systems remained within normal latency thresholds. Our monitoring network continuously samples latency from external probes to targets reachable via these cables.

About the cables

  • Guam Okinawa Kyushu Incheon (GOKI) (2013) - Guam Okinawa Kyushu Incheon (GOKI) is a point-to-point submarine cable linking Japan and Guam. Landing at Kitakyushu, Naha, Tumon Bay, it provides a direct fiber-optic path between the two countries, serving as both a primary data route and a redundancy option for neighboring cable systems. Read more →
  • Australia-Japan Cable (AJC) (2001) - Australia-Japan Cable (AJC) is a cross-regional submarine cable connecting Japan, Australia, Guam. Its 6 landing points at Maruyama, Oxford Falls, Paddington, Shima, Tanguisson Point, and 1 more bridge the networks of East Asia, Oceania, providing an important path for international data traffic. Read more →

Submarine cable data from TeleGeography. Geographic context from Wikipedia. Monitoring metrics updated continuously by GeoCables.

What next: Tumon Bay, Guam in the global directory of cable landing points; see surrounding routes on the interactive submarine cable map or follow live network monitoring.

Our measurements to Tumon Bay

Traceroutes from our own measurement points over the last 30 days: usual delay and number of network hops on the way to Tumon Bay.

  • From RIPE Atlas probes: 293 ms, 18 hops, 3383 traces

Last trace: 2026-10-15. Live network map

Other Landing Points in Guam

FAQ

Which submarine cables land at Tumon Bay, Guam?
Tumon Bay, Guam hosts two submarine cable systems: the Australia-Japan Cable (AJC) and the Guam Okinawa Kyushu Incheon (GOKI).
When was the first cable laid at Tumon Bay, Guam?
The first submarine cable to land in Tumon Bay, Guam, was the Guam Okinawa Kyushu Incheon (GOKI) cable, which came into service in 2016.
Which oceans does this landing point bridge?
Tumon Bay bridges the Philippine Sea to the west and the Pacific Ocean to the east, connecting Guam with other regions in Asia and the Americas via submarine cables.
What are some notable operators of these submarine cables at Tumon Bay, Guam?
The Australia-Japan Cable (AJC) is operated by NTT Communications, while the Guam Okinawa Kyushu Incheon (GOKI) cable is managed by GII-NTT.
Why was this specific place chosen for submarine cables?
Tumon Bay was selected due to its strategic location on the Pacific Rim, offering a suitable depth and environmental conditions for cable landing. Additionally, it provides easy access to Guam's infrastructure, facilitating international connectivity.

Landing Point

  • CountryGU Guam
  • Coordinates13.5136°N 144.8006°E
  • Connected Cables2

See Real Cable Routes

View actual submarine cable routing from Tumon Bay, Guam - with backbone nodes, distance calculations, and latency estimates

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