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Northern Ireland, the Channel Islands and the Isle of Man

Updated 2026-10-11

Our postcode data is OS Code-Point Open, which covers Great Britain (England, Scotland and Wales).

Northern Ireland (BT postcodes)

We recognise BT postcodes as Northern Ireland, but cannot look up the district. Northern Ireland has a different network footprint, so some GB offers may not apply. Comparing quotes you've been given works exactly the same.

Jersey, Guernsey and the Isle of Man (JE, GY, IM)

These have their own providers and regulators. UK offers, and the Ofcom rules in our guides, may not apply. You can still use the calculator to compare quotes.