What good does it do to put the number in the URL rather than the body? Even if someone is trying to phish you, they'd just put the number in their URL instead. Is it just to make you look closer to the domain name?
[1] https://www.bankid.com/en/utvecklare/guider/teknisk-integrat...
https://shufflingbytes.com/posts/ripping-off-professional-cr...