Alastor from Hazbin Hotel died in his early 30s, around the year 1933, making his birth roughly in the late 1800s or early 1900s. Specifically, sources estimate his age at death to be between 30 and 40 years old, with a common approximation being about 40 years old. Since he has been dead for about 90 years and is biologically immortal in Hell, he remains the same age as when he died. Chronologically, adding his lifetime on Earth and his time in Hell, Alastor is estimated to be between 120 and 130 years old

. In summary:

• Age at death: early 30s to around 40 years old
• Year of death: circa 1933
• Chronological age including afterlife: 120–130 years old
• Immortal in Hell, does not age physically beyond death age