Genjar said:
I think that falls under get?

Fan-tastic! That's exactly what I was looking for, but that's a really cryptic name for a tag IMO. :-/

DiceLovesBeingBlown said:
Milestone

After reading the wikipage, I believe the tag Genjar mentioned fits better:

On e621, it is mostly used for images with a specific post ID, like #13, #113, #10013, #50013, #100013, all the way to currently #1000013.

Thanks, guys!