| It Says: | You have: |
| WRT54G | G v1.0 |
| WRT54G ver1.1 | G v1.1 |
| WRT54G ver2 | G v2.0 |
| WRT54G v2.2 | G v2.2 |
| WRT54G v.3 | G v3.0 |
| WRT54GS | GS v1.0 |
| WRT54GS v1.1 | GS v1.1 |
| WRT54GS v.2 | GS v2.0 |
| Anything Else | Use the serial # |
| It starts with: | You have: |
| CDF0 | G v1.0 |
| CDF1 | G v1.0 |
| CDF2 | G v1.1 |
| CDF3 | G v1.1 |
| CDF5 | G v2.0 |
| CDF7 | G v2.2 |
| CDF8 | G v3.0 |
| CDF9 | G v3.1 |
| CDFA | G v4.0 |
| CDFB | G v5.0 (Runs VxWorks!) |
| CGN0 | GS v1.0 |
| CGN1 | GS v1.0 |
| CGN2 | GS v1.1 |
| CGN3 | GS v2.0 |
| CGN4 | GS v2.1 |
| CGN5 | GS v3.0 |
| CGN6 | GS v4.0 |
| CGN7 | GS v5.0 (Runs VxWorks!) |
| SJH0 | WTR54GS v1.0 |