All phone numbers in Morocco are 9 digits in length (excluding the leading 0). Morocco uses a closed numbering plan, i.e. the prefix is not omitted for local calls. This is necessary because the same geographic area can be served by several prefixes. Casablanca, for instance, has 10 prefixes. Fixed and mobile prefixes belong exclusively to one phone company. On the following list, fixed networks are indicated by the following letters:I = Itissalat Al-Maghrib (fixed), M = Médi Telecom (NGN), W = WANA (Maroc Connect) (fixed NGN), X = WANA (Maroc Connect) (fixed GSM(?))