The chip does lead to Avid, and they'd at least get my vet's number from that. But there are plenty of universal look-up sites, and most people tend to google chip numbers now instead of calling the number on the scanner.
They're registered with a couple others, too, but AKC and Avid are the only ones I paid for.
Not that it matters, but for education's sake, I believe Home Again is iso compatible. I know that prior to our having Home Again chips, we borrowed some from other clinics for several pets who were travelling abroad who needed ISO chips.
Yea at a staff meeting once I was all "OMG GUYS THERE'S THIS UNIVERSAL MICROCHIP LOOK UP SITE" and they (very diplomatically) told me that was the one they were all already using. :/