Telephone numbers in Yemen

The 0 prefix for area codes is used when dialing locally within Yemen, e.g. 01-xxx-xxx and is omitted when calling from outside Yemen, e.g. +967-1-xxx-xxx.

Telephone numbering plan
The telephone numbering plan in Yemen is as follows:

Pre-unification
Before the Yemeni unification, North Yemen and South Yemen had different numbering plans and different country codes, with South Yemen using +969 and North Yemen using +967, with the latter becoming the country code for present day unified Yemen.