| User agent |
|---|
| W3C-checklink/4.5 [4.160] libwww-perl/5.823 |
| W3C-checklink/4.81 libwww-perl/5.836 |
| W3C-checklink/4.0 [4.4] libwww-perl/5.803 |
| W3C-checklink/4.81 libwww-perl/6.04 |
| W3C-checklink/5.0.0 |
| W3C-checklink/5.0.0 libwww-perl/6.36 |
| W3C-checklink/4.81 libwww-perl/6.15 |