بسم الله الرحمن الرحيم
No, you are not allowed to enter Makkah without wearing ihram. In view of the respect of Kabah it is necessary to wear the Ihram for the person who visits it whether for Umrah or Hajj or to meet any person. You should wear the Ihram from the meeqat.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.