Australian Phonecards
One Of Every Code Number

N  - 1st letter indicated the Group. N: National Issue.
94 - 2nd & 3rd digits represent the year of production. 1994.
31 - 4th & 5th digits represents the series number for the year. 31st series for 1994.
3   - 6th digit indicates the number of the card in its series. This was the 3rd card in the series, following the $5 and $10 cards.
4   - 7th digit represents the value of the card. 0e = 0.80c, 0 = $1.50, 1 = $2, 1d = $4, 2 = $5, 3 = $10, 4 = $20 & 5 = $50.
a   - 8th digit (and not always present) indicates that the card has added value. In this case, the $20 card has $20.80 value
      encoded. The added encoding was used only on $10, $20 & $50 cards, never on $2 & $5 cards (except erroneously on
      Prefix 524). There are occasions where the "a" has not been added, but the cards still have added value. These appear
      to have been errors on Telstra's part.

Some of the Not Used Codes are the result of cancelled issues, for example, the Apollo 12 series.

In most cases, a series of cards is produced in monetary order, i.e. $2, $5, $10, $20 etc, with the Code Number (6th digit) sequence being in the same order. Occasionally, this did not occur, as is the case with 95 09 Payphones, the $20 has sequence 1, the $2 sequence 2, the $10 sequence 3 and the $5 sequence 4. Where this occurs, the phrase, (Code No's not in monetary order) is used to show this.

If you collect one of every code number, ignoring any variations regarding Faces or Reverses, you will end up with 838 cards.