Brand

I have a 16 year old gelding with a four digit number freeze brand just below and behind his wither on the left side of his back. He seems to be a Warmblood type. He was most likely imported because I don't think any breed registries freeze brand in Canada. We have been show jumping successfully for a while now. Does anyone recognize that kind of brand or know what breed he might be? I would really like to know his breed and find out where he came from. Thanks,
Madi