I'm always looking up MAC addresses and hate how the online tools always want you to type in either a specific type of delimitation or none at all so I made my own, added links to google maps and google search of the vendor for good measure.
Test it and break it
https://osayidan.net/webtools/oui_search/
it accepts no delimitation
000000000000
colons, dashes, dots, spaces
00:00:00-00 00.00
and that annoying cisco thing
0000.0000.0000
those are all the ones I've run into, let me know of any other weird MAC formatting you may have seen so I can add it.