Landing Point · US United States
| Cable | Status |
|---|---|
| TERRA SW | Active |
RTT measurements to this landing point from 2026-04-18 through 2026-06-01 — live ICMP round-trip time via RIPE Atlas probes. Recomputed daily. ✓ No anomalies detected in the monitored period.
| Probe | Location | Samples | Avg |
|---|---|---|---|
| #1014589 own probe | Almaty KZ | 4 | 214.5 ms |
| #1014473 own probe | Minsk BY | 3 | 137.1 ms |
| #1014597 own probe | Tbilisi GE | 3 | 162.0 ms |
| #1014969 own probe | Jerusalem IL | 3 | 160.9 ms |
| #1015313 own probe | Sevastopol UA | 3 | 165.4 ms |
| #1015523 own probe | Moscow RU | 2 | 133.6 ms |
| #6410 own probe | Sao Paulo BR | 1 | 138.8 ms |
| #7062 own probe | Cape Town ZA | 1 | 261.5 ms |
Port Alsworth is a census-designated place in Lake and Peninsula Borough, Alaska, situated approximately 165 miles southwest of Anchorage. Despite its remote inland location, Port Alsworth serves as a submarine cable landing point within the United States cable network. One submarine cable lands here: TERRA SW, a domestically oriented system connecting points within the United States.
The TERRA SW cable, which reached ready-for-service status in 2012, links Port Alsworth to other landing points entirely within the United States, making this a domestic connectivity node rather than an intercontinental gateway. For a small community of approximately 186 residents, the presence of submarine cable infrastructure represents a notable element of the regional communications landscape in Alaska.
TERRA SW is the single submarine cable landing at Port Alsworth. Its ready-for-service date is recorded as 2012, though its status is noted as draft. All other endpoints on the TERRA SW cable are also located within the United States, placing this system firmly in the category of domestic submarine cable infrastructure. No cable length or capacity specifications are on record for this system.
Within the United States submarine cable network, Port Alsworth hosts one cable across 160 domestic landing points. Major landing points elsewhere in the country, such as Boca Raton, FL and San Juan, PR, each host eight cables, while Hermosa Beach, CA, Kapolei, HI, and Myrtle Beach, SC each host five. Port Alsworth, with a single cable, ranks in the top 69 percent of United States landing points by cable count, reflecting the broad geographic distribution of the country's submarine cable infrastructure rather than concentration at a small number of hubs.
Port Alsworth functions as a single-cable terminus within a domestic United States submarine cable corridor. The TERRA SW system does not extend beyond United States territory, meaning this landing point contributes to intra-national connectivity rather than international or intercontinental routing. Its role is therefore distinct from the major international hubs found elsewhere along the continental and island coastlines of the United States.
In the broader submarine cable graph of the United States, Port Alsworth represents the reach of undersea cable technology into one of the country's more remote regions, illustrating how domestic submarine systems extend network access to communities far from the main concentrations of international cable infrastructure.
View actual submarine cable routing from Port Alsworth, AK, United States — with backbone nodes, distance calculations, and latency estimates
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