Never have to change your pets tag again.
I have discovered a great fun way to keep your pets tag info up to date.
I got my dog a .tel (mobile friendly, fast new web site no programing knowledge required).
Have a look at I-am-Charlie.tel. I had it embroidered on Charlie's collar (see pic.)
If your contact details change or your pet goes missing, just update your .tel and instantly any one finding your pet can look up your contact details and contact you. The telephone number is interactive if looked up on a mobile phone, they just find your pets site on their phone and click to call, this is great as most people have mobile phones and most dogs and cats are found outdoors, you'll probably get a call as soon as your pet is sighted.