The telephone number 0879489425 is a text notification service currently being used by the Health Service Executive (HSE) to send vaccine notices in the Republic of Ireland. 

This is supported by the tweet below from a user called Cian O’Mahony:

Legitimate texts from the number 0879489425 should just include your name and the vaccine manufacturer. 

Is my text from 0879489425 fake?

There have been reports from other users of fake texts sent from this number. Therefore it is worth checking your vaccine notification with the HSE before your appointment.