Easier still, because now you can go look them up yourself, right?
, then click on the "Serial Numbers" link on the left side of the page. Then click on "Farmall," "International," or "Farmall and International" to find your tractor's model. You may need to look through a couple of the categories to find your tractor's model.
The serial numbers listed are the FIRST for a particular year, not the only serial number for that year. I'm not sure why, but many many people get confused because their exact serial number isn't listed... Anyway, serial numbers are unique for a particular model of tractor. Yours will be different from everybody else's.