The France Télécom tariff appears to be based on four calling periods and 6 distances. Calls are charged in units, costing FRF 0.742 each. The time for each unit is as follows:
|Name||Local||< 25 km||< 30 km||< 52 km||< 100 km||>= 100 km||Period applicable|
|Tarif rouge||180||120||72||45||24||26||0800-1230 M-Sa, 1330-1800 M-F|
|Tarif blanc||270||170||102||64||34||37||1230-1330 M-Sa, 1800-2130 M-F|
|Tarif bleu||360||240||144||90||48||52||all other times|
|Tarif bleu nuit||540||340||204||128||68||74||2230-0600|
|Public holidays are charged as for Sundays|
Details taken from planete.net.
The distance for a call depends on the charge zones that the two phones are in. There are 424 charge zones. In turn, the charge zone is determined from the first 5 digits of the 9 figure number (the first 4 digits and the zone of the old 8 figure number). There are 6706 valid 5 figure prefixes.