The table below lists the characters that can appear in the Traceroute command output.
| Character | Description |
| nn msec | For each node, the round-trip time in milliseconds for the specified number of probes |
| * | The probe timed out |
| A | Administratively prohibited (example, access-list) |
| Q | Source quench (destination too busy) |
| I | User interrupted test |
| U | Port unreachable |
| H | Host unreachable |
| N | Network unreachable |
| P | Protocol Unreachable |
| T | Timeout |
| ? | Unknown packet type |
