Singapore is a hub in the submarine networks for connections from East Asia to South Asia,  Persian Gulf,  Mediterranean,  and Europe regions, and vice versa. Many submarine cable have been developed and are developing into Singapore.

The Info-communications Media Development Authority (IMDA) is the lead agency for facilitating the deployment of submarine cable systems into Singapore. The IMDA provides guidance to interested parties and facilitates the process for applying for the necessary permits from various authorities. a Facilities-Based Operations (FBO) licence is required to deploy the submarine cable system into Singapore.

According to the 2016 edition of the Guidelines on Deployment of Submarine Cables into Singpaore issued by IMDA, as of September 2016, Singapore is connected to 17 active submarine cable systems, with a potential bandwidth capacity of more than 410 Tbps. These 17 submarine cable systems are landed in three designated landing sites in Singapore, namely the Changi North landing site, the Tanah Merah landing site, and the Tuas landing site. All new submarine cable systems can only be deployed to designated landing sites and each landing site is available on a first-come-first-served basis. 

There are now seven cable landing stations, cluding:

• 4 cable landing stations in Changi, owned and operated respectively by Singtel, StarHub, Matrix Networks and Telstra (formerly Pacnet).
• 1 cable landing stations in Tuas,
• 1 cable landing stations in Tanah Merah
• 1 cable landing stations in Katong.

Here is a complete list of submarine cables connecting Singapore:

Cables northeastwards to Asia

• APCN (retired)
• APCN-2
• APG
• ASE
• EAC-C2C
• Matrix Cable System (MCS)
• MIC-1
• PGASCOM
• SEAX-1 (2018)
• SJC
• SJC2 (2021)

Cables westwards to South and West Asia

• i2i
• MIST (2022)
• SIGMAR (2020)
• Tata Indicom Cable(TIC)
• Thailand - Indonesia - Singapore (TIS)
• Bay of Bengal Gateway (BBG). The BBG cable lands Penang, Malaysia, with a diverse terrestrial network from Malaysia to the Singapore points-of-presence at Equinix and Global Switch.
• India-Asia-Xpress (IAX)(2022)

Cables westwards to Europe and Africa (as well as South and West Asia)

• FLAG FEA
• AAE-1(2017). The AAE-1 doesn't land in Singapore, instead in Malaysia. With terrestrial extension between Malaysia and Singapore as a part of the AAE-1 cable system, AAE-1 Singapore PoPs are located at Equinix and Global Switch data centers in Singapore 
• SMW3
• SMW4
• SMW5 (2016)
• SMW6 (2023)

Cables eastwards to Australia

• Indigo-West (2019)
• Australia Singapore Cable (2018)
• Trident (pending)
• SMW3

Cables connecting the United Station

• AAG
• BtoBE (2022 or later)
• SEA-US (2018). The SEA-US terminates in Kauditan, Indonesia, without landing in Singpaore. Combined with SEA-US, Telin's IGG and other subsea cables, SEA-US forms an importan route connecting Singapore and the US.