THIRD LEVEL
| Alexa Country Rank | Alexa Overall Rank | Domain Name |
| 1 | 406 | nih.gov |
| 2 | 666 | ca.gov |
| 3 | 710 | nasa.gov |
| 4 | 1048 | weather.gov |
| 5 | 1133 | noaa.gov |
| 6 | 1368 | irs.gov |
| 7 | 1454 | state.gov |
| 8 | 1778 | ed.gov |
| 9 | 1873 | usgs.gov |
| 10 | 2806 | wa.gov |
| 11 | 3062 | uspto.gov |
| 12 | 3187 | usajobs.gov |
| 13 | 3254 | nps.gov |
| 14 | 3504 | cdc.gov |
| 15 | 3698 | usembassy.gov |
| 16 | 3871 | usda.gov |
| 17 | 3983 | loc.gov |
| 18 | 4098 | whitehouse.gov |
| 19 | 4124 | house.gov |
| 20 | 4171 | census.gov |
| 21 | 4277 | michigan.gov |
| 22 | 4289 | nyc.gov |
| 23 | 4546 | uscis.gov |
| 24 | 5219 | ssa.gov |
| 25 | 5338 | utah.gov |