Changi South, Singapore

Changi South, Singapore is a submarine cable landing point in Singapore. 5 international cable systems come ashore here, and together they reach 9 other countries.

Why cable lands at Changi South

Changi Airport is the main international airport of Singapore, and functions as one of the most significant aviation gateways in the Asia-Pacific region. Its 5 systems give Changi South direct international reach to China, Japan, South Korea and Malaysia and beyond (9 countries in all), the role that justified building international cable here rather than routing through an inland neighbour.

Where its cables reach

• Asia Pacific Gateway (APG), Asia Submarine-cable Express (ASE)/Cahaya Malaysia, EAC-C2C, Matrix Cable System and Southeast Asia-Japan Cable 2 (SJC2) connect it to Asia (including China, Japan, South Korea, Malaysia, Thailand).

The systems in detail

The roster spans 23 years of build-out, from EAC-C2C (2002) to Southeast Asia-Japan Cable 2 (SJC2) (2025). Documented capacity and vintage vary across the roster: Asia Pacific Gateway (APG) (10,400 km and in service since 2016), Asia Submarine-cable Express (ASE)/Cahaya Malaysia (8,148 km and in service since 2012), EAC-C2C (36,500 km and in service since 2002), Matrix Cable System (1,055 km and in service since 2008) and Southeast Asia-Japan Cable 2 (SJC2) (10,500 km and in service since 2025). Facts for every system are on its own cable page.

What the concentration means for resilience

With 5 independent systems, Singapore has real redundancy through this point: no single cable cut isolates it from the destinations they share. Because these systems share the same short stretch of coast and shore infrastructure, a localized event at the landing zone can reach far more capacity than the cable count alone suggests. GeoCables tracks each of these systems individually for exactly this reason.

What our monitoring has recorded

GeoCables watches these systems continuously rather than describing them once. Since 2026-03-10 we have logged 122 route anomalies across 68 cable systems worldwide. Three have touched this location's own cables: a 129% round-trip latency spike on Asia Pacific Gateway (APG) (2026-04-17, recovered by 2026-04-17), a 148% round-trip latency spike on Asia Pacific Gateway (APG) (2026-04-17, recovered by 2026-04-17) and a 185% round-trip latency spike on Asia Submarine-cable Express (ASE)/Cahaya Malaysia (2026-04-05, recovered by 2026-04-05). These were latency events on the systems' wider routes, not outages at the landing itself, and they cleared on their own. This record grows as we detect more, which is the difference between a directory entry and a monitored asset.

Latency, measured

From the GeoCables probe network, best-case round-trip time to Singapore endpoints runs about 315 ms from Sao Paulo, about 189 ms from Minsk and about 205 ms from Tbilisi. These are paths into Singapore from our own vantage points, not a global average, and they shift as operators re-route.

Who depends on it

The largest access networks in Singapore sit behind this coastal capacity: Singtel Fibre Broadband (16.8% of users), Starhub Ltd (12.8% of users), Cloudflare, Inc. (10.8% of users) and MobileOne Ltd. Mobile/Internet Service Provider Singapore (8% of users). See the full national picture for Singapore.

In short, Changi South, Singapore carries international traffic for Singapore across 5 independent cable systems reaching 9 countries on 1 continent, and GeoCables monitors each of them in real time.