Hibernia Express

Hibernia Express is a 6,300km subsea cable connecting London to New York via Halifax, Canada. Originally built by Hibernia Networks for low-latency HFT connectivity, the cable passed through GTT Communications (AS3257) following GTT's 2017 acquisition of Hibernia. After GTT filed for Chapter 11 bankruptcy protection, its European infrastructure division — including Hibernia Express — was sold to I Squared Capital, forming EXA Infrastructure in 2022. EXA Infrastructure continues to operate the cable under AS3257. Hibernia Express delivers approximately 59ms round-trip on the London-New York corridor and remains a primary route for inter-exchange arbitrage between LSE, ICE Europe, NYSE and CME. CableAlert monitors via BGP telemetry on AS3257.