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The Union de Radioaficionados Espanoles (URE, Spain's IARU member society) will celebrate the centenary of the International Amateur Radio Union on 15-30 April. Look for special callsigns AO100IARU, AO1IARU, AO2IARU, AO3IARU, AO4IARU, AO5IARU, AO6IARU (Balearic Islands), AO7IARU, AO8IARU (Canary Islands) and AO9IARU (Ceuta & Melilla). QSL via EA4URE; a number of awards will be available, details will be published on https://iaru100.ure.es/ in due course.