| Domain Prefix |
|---|
| usf0... |
| usf1... |
| usf2... |
| usf3... |
| usf4... |
| usf5... |
| usf6... |
| usf7... |
| usf8... |
| usf9... |
| usfa... |
| usfb... |
| usfc... |
| usfd... |
| usfe... |
| usff... |
| usfg... |
| usfh... |
| usfi... |
| Domain Prefix |
|---|
| usfj... |
| usfk... |
| usfl... |
| usfm... |
| usfn... |
| usfo... |
| usfp... |
| usfq... |
| usfr... |
| usfs... |
| usft... |
| usfu... |
| usfv... |
| usfw... |
| usfx... |
| usfy... |
| usfz... |
| usf-... |