Answers

1. Are integers allowed at the third level? For example, can I register the following names:
   
   8.8ol.name
   12345.9999a.name
   
   Yes. Both domains above would be allowed as registrations.
   
   
2. Are special characters permitted in .name pre-registration? For example, can I register the following names:
   
   r#k.baraniuk.name
   rick@baraniuk.dfmm.name
   
   No. Only the domain character set is allowed for registrations, this is [0-9], [A-Z] and hyphens.
   
   
3. Are hyphen ( - ) and underscore ( _ ) characters allowed? If yes at what position and what are the limitations? For example, can I register the following names:
   
   r--k.baraniuk.name
   ri____ck.bara____niuk.name
   ric__k.baraniu_k.name
   
   Yes and no. Hyphens are allowed, but not in the third and fourth character positions. Underscores are not allowed.
   
   
4. Are single characters allowed in the second and third levels? For example, can I register the following names?
   
   a.a.name
   r.r.name
   
   One character is only allowed in the third level. Therefore you could register r.baraniuk.name but not r.b.name.
   
   
5. Can names end with hyphen (-) and/or with underscore (_)? For example, can I register the following names?
   
   rick.bara--.name
   rick.bara___.name
   
   No. As a standard domain rule, domains are not allowed to begin or end with a hyphen or an underscore.
   
   
6. What is the maximum number of character allowed in domain (excluding .name)?
   
   63 characters is the maximum allowed.