EXA Infrastructure has switched on 1,935 kilometres of new fibre across Europe: a 335km Milan-Zurich Alpine route and a 1,600km Paris-Vienna corridor that the wholesaler says will carry AI and cloud traffic between data centres and subsea cable landings.

The shorter link closes EXA's Frankfurt-Zurich-Milan-Genoa corridor at 1,050km, giving operators a direct shot at Genoa's subsea hub without routing through France.

EXA claims it is the first carrier-grade, low-loss G.652.D single-operator cable system across this Alpine path. The cable type matters: G.652.D allows longer unamplified spans — useful when you're threading valleys and tunnels instead of laying across farmland.

Both routes carry dark fibre, spectrum and wavelength services, with hundreds of fibre strands and equipment sites provisioned to scale capacity on demand.

The Paris-Vienna leg slots into a longer London-Balkans-Turkey backbone with onward reach into the Middle East, and offers a fresh path for transatlantic traffic landing in France or the UK before heading east. At 1,600km, it covers roughly the overland distance from London to Istanbul.

What is EXA actually betting on?

AI and cloud traffic patterns have shaped the build, not the other way around. "AI and cloud traffic has outgrown the idea that diversity means a backup path," Steve Roberts, EXA's head of strategic investments and product management, said. "Customers want a choice of routes they can design around resilience, latency and capacity requirements."

Roberts framed the two launches as one footprint play. "With Milan-Zurich we have completed a corridor that gives Frankfurt, Milan and Genoa the high-capacity connectivity they need, and with Paris-Vienna we have strengthened the route from London to the Balkans, Turkey and the Middle East," he said. "Both are built to meet the demand our customers are planning for and extend our low-loss G.652.D footprint across Europe."

Why does the Alpine segment carry such a heavy capex tag?

Tunnelling, permits and ground conditions push per-kilometre costs well above flat-trunk corridors. EXA's bet is that low-loss fibre improves the unit economics: longer spans cut the number of regeneration sites needed between Frankfurt and Genoa, and single-operator ownership removes the lease-back handoffs that add latency. EXA hasn't disclosed capex for either route.

EXA has been busy elsewhere too. Recent announcements include a US-UK transatlantic cable, a Barcelona-Bilbao route and new London-Frankfurt-Amsterdam-Brussels fibre, all unveiled in the past year. The pattern is consistent: build where data centre growth is hottest, then stitch corridors together.

Both routes are live and taking orders. Whether AI-driven traffic justifies the current build pace — or whether EXA is routing ahead of demand into a softening European wholesale market — should become clearer in the next two years of capacity sales.