I have a record id: a4o110000005EWH
I know the object prefix is a4o.
I have about 200 of the a40* records in the database.
The 11th, 12th, 13th, 14th characters of the 18 digit ID seem to uniquely ID the records thus far. In other words there is only 1 record whose id both starts with a4o and ends with 5EWH. I know best practice is to reference 15 digit ids when working within salesforce and 18 digit ids when working with foreign systems but my question is not about using best practices. My question is for how long can I rely on this pattern of using the first 3 and 11-14th characters to uniquely ID a record? In other words at what point will the count of zeros (in id assignment) change from six zeros (000000) to something different (five zeros or something else)