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ICMP
| Type | Code | Code | Code Description | Type Description |
| 0 | 0 | - | No Code | Echo Reply (RFC792) |
| 1 | - | - | - | Unassigned |
| 2 | - | - | - | Unassigned |
| 3 | 0 | - | Net unreach | Destination Unreachable (RFC792) |
| 3 | 1 | - | Host unreach | Destination Unreachable (RFC792) |
| 3 | 1 | 2 | Protocol unreach | Destination Unreachable (RFC792) |
| 3 | 1 | 3 | Port unreach | Destination Unreachable (RFC792) |
| 3 | 1 | 4 | Frag need, don't frag set | Destination Unreachable (RFC792) |
| 3 | 1 | 5 | Source Route failed | Destination Unreachable (RFC792) |
| 3 | 1 | 6 | Dest Network unknown | Destination Unreachable (RFC792) |
| 3 | 1 | 7 | Dest Host unknown | Destination Unreachable (RFC792) |
| 3 | 1 | 8 | Source Host isolated | Destination Unreachable (RFC792) |
| 3 | 1 | 9 | Dest Net Admin prohibit | Destination Unreachable (RFC792) |
| 3 | 1 | 10 | Dest Host Admin prohibit | Destination Unreachable (RFC792) |
| 3 | 1 | 11 | Dest Net unreach ToS | Destination Unreachable (RFC792) |
| 3 | 1 | 12 | Dest Host unreach ToS | Destination Unreachable (RFC792) |
| 3 | 1 | 13 | Com Admin prohibit (RFC1812) | Destination Unreachable (RFC792) |
| 3 | 1 | 14 | Host Prece Viol (RFC1812) | Destination Unreachable (RFC792) |
| 3 | 1 | 15 | Prece cutoff effect (RFC1812) | Destination Unreachable (RFC792) |
| 4 | 0 | - | No Code | Source Quench [RFC792] |
| 5 | 0 | - | Redirect dtgm Net | Redirect [RFC792] |
| 5 | 1 | - | Redirect dtgm Host | Redirect [RFC792] |
| 5 | 2 | - | Redirect dtgm ToS Net | Redirect [RFC792] |
| 5 | 3 | - | Redirect dtgm ToS Host | Redirect [RFC792] |
| 6 | 0 | - | Alternate Address Host | Alternate Host Address |
| 7 | - | - | - | Unassigned |
| 8 | 0 | - | No Code | Echo [RFC792] |
| 9 | 0 | - | Normal Router Advert | Router Advertisement [RFC1256] |
| 9 | 16 | - | Not Route ComTraf [RFC2002] | Router Advertisement [RFC1256] |
| 10 | 0 | - | No Code | Router Selection [RFC1256] |
| 11 | 0 | - | TTL Exceed in Transit | Time Exceeded [RFC792] |
| 11 | 1 | - | Frag Reassembly Time Exceed | Time Exceeded [RFC792] |
| 12 | 0 | - | Pointer indicates error | Parameter Problem [RFC792] |
| 12 | 1 | - | Missing Req Option [RFC1108] | Parameter Problem [RFC792] |
| 12 | 2 | - | Bad Length | Parameter Problem [RFC792] |
| 13 | 0 | - | No Code | Timestamp [RFC792] |
| 14 | 0 | - | No Code | Timestamp Reply [RFC792] |
| 15 | 0 | - | No Code | Information Request [RFC792] |
| 16 | 0 | - | No Code | Information Reply [RFC792] |
| 17 | 0 | - | No Code | Address Mask Request [RFC950] |
| 18 | 0 | - | No Code | Address Mask Reply [RFC950] |
| 19 | - | - | - | Reserved (for Security) |
| 20-29 | - | - | - | Reserved (for Robustness Experiment) |
| 30 | - | - | - | Traceroute [RFC1393] |
| 31 | - | - | - | Datagram Conversion Error [RFC1475] |
| 32 | - | - | - | Datagram Conversion Error [RFC1475] |
| 33 | - | - | - | IPv6 Where-Are-You |
| 34 | - | - | - | IPv6 I-Am-Here |
| 35 | - | - | - | Mobile Registration Request |
| 36 | - | - | - | Mobile Registration Reply |
| 39 | - | - | - | SKIP |
| 40 | 0 | - | Bad SPI | Photuris [RFC2521] |
| 40 | 1 | - | Authentication Failed | Photuris [RFC2521] |
| 40 | 2 | - | Decompress Failed | Photuris [RFC2521] |
| 40 | 3 | - | Decrypt Failed | Photuris [RFC2521] |
| 40 | 4 | - | Need Authentication | Photuris [RFC2521] |
| 40 | 5 | - | Need Authorization | Photuris [RFC2521] |