NeuLevel is the domain name registry wing of the giant NeuStar, which brought you the North American Numbering Plan for telephones. NeuLevel’s first baby was .biz, the ugly stepsister (i.e., least popular) of the unrestricted generic top-level domains — due to the name itself, and not NeuLevel’s service, which is top-notch. NeuLevel designed and implemented an impressive two-tier registrar system for .CN (China), and serves as the interface for non-Chinese registrars. Just as impressive, given the touchy political situation, they have done a similar job for .TW (Taiwan). Obviously NeuLevel knows how to handle complicated business rules in their registries.