Anritsu Cards produced by Telstra were made up in a Prefix Number
range starting at 0 and concluding with
1581. The prefix number is
identifiable, starting from the right, as the 6th to 9th numbers on any card. Thus,
in the two images shown below, card number
0000017349599 is the 49,599th card of
prefix 173, while card number 0132167982
is the 67,982nd card of prefix 1321.
Some unique issues were spread over a number of prefix numbers,
while other prefix numbers were shared with different faces.
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