Telephone numbers in Christmas Island use ranges owned by Australia.
Format +61 8 9164 XXXX
Number range Usage +61 8 9164 Christmas Island
Christmas Island numbers used the +672 country code until 1994, when they were migrated to +61.
Date Number Country code pre-1994 (04) 2345 +672 1994–1997 (091) 64 2345 +61 1997–now (08) 9164 2345 +61
References