https://www.ntt-west.co.jp/ptd_e/ic_card/exchange.html
The exchange end of the IC Telephone Cards | NTT WEST
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https://www.phonecardshop.net/
Telephone cards: a world to collect - The Phonecard Shop
Jul 31, 2025 - The Phonecard Shop: a large selection of collectible telephone cards from all over the world, all directly available for sale.
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