It is highly possible, Once the number became dormant for 120 days (No reloading transaction), it will be quarantine and later on be re-issue.
Try calling the hotline 211 using your globe and request for change of number for FREE due to those messages (mine was from collecting agents, threats, etc, which i find it very harmful and alarming so they changed it for free).
Globe recycles numbers. Read this:
ARTICLE 12 TELEPHONE NUMBERS (for Mobile and Landline Services) Randomly assigned telephone numbers for mobile or landline follow the numbering plan assigned by the NTC. We retain ownership over these numbers, thus, having the right to change and allocate any telephone number assigned to you at any time without incurring any liability for any loss or inconvenience on your part. Furthermore, we have the right to dispose of the telephone number in whatever way we deem necessary and/or convenient in the event of termination of this Agreement.