The Prophet ﷺ fixed Dhul-Hulaifa as the Miqat for the people of Medina, Al-Juhfa for the people of Sham, Qarn-al-Manazil for the people of Najd, and Yalamlam for the people of Yemen; and these Mawaqit are for those living at those very places, and besides them for those whom come through them with the intention of performing Hajj and Umra; and whoever is living within these Mawaqit should assume lhram from where he starts, and the people of Mecca can assume Ihram from Mecca.  

أَنَّ النَّبِيَّ ﷺ وَقَّتَ لأَهْلِ الْمَدِينَةِ ذَا الْحُلَيْفَةِ وَلأَهْلِ الشَّأْمِ الْجُحْفَةَ وَلأَهْلِ نَجْدٍ قَرْنَ الْمَنَازِلِ وَلأَهْلِ الْيَمَنِ يَلَمْلَمَ هُنَّ لأَهْلِهِنَّ وَلِكُلِّ آتٍ أَتَى عَلَيْهِنَّ مِنْ غَيْرِهِمْ مِمَّنْ أَرَادَ الْحَجَّ وَالْعُمْرَةَ فَمَنْ كَانَ دُونَ ذَلِكَ فَمِنْ حَيْثُ أَنْشَأَ حَتَّى أَهْلُ مَكَّةَ مِنْ مَكَّةَ