miabellaamoure,
Thank you for your very kind words.
But I got tired of listing those Links, and gave up !!
There's many more out there somewhere.
Plus, finding out what Frequency a certain Tag transmits,
is very difficult at times.
Now, I understand that some Vets say don't worry about this, but...
1) There's no assurance that they will pursue the registration for you.
2) When reporting a loss to a facility, they may not have the correct Reader/Scanner for your animals Chip.
I say strongly..
Know what you've got, and, make sure it's done YOURSELF ! 
Have a good Day !
S.W.