Internet Control Message Protocol (ICMP) Parameters
Unfinished Document - please be awere of this!
This is mosty a copy from IANA so if you don't find it here try this page instead.
ICMP Type Numbers
Registration Procedures
IESG Approval or Standards Action
Reference
[RFC2939]
Note
The Internet Control Message Protocol (ICMP) has many messages that are identified by a "type" field.
| Type | Name | Reference |
| 0 | Echo Reply | [RFC792] |
| 1 | Unassigned | [JBP] |
| 2 | Unassigned | [JBP] |
| 3 | Destination Unreachable | [RFC792] |
| 4 | Source Quench (Deprecated) | [RFC792][RFC6633] |
| 5 | Redirect | [RFC792] |
| 6 | Alternate Host Address | [JBP] |
| 7 | Unassigned | [JBP] |
| 8 | Echo | [RFC792] |
| 9 | Router Advertisement | [RFC1256] |
| 10 | Router Solicitation | [RFC1256] |
| 11 | Time Exceeded | [RFC792] |
| 12 | Parameter Problem | [RFC792] |
| 13 | Timestamp | [RFC792] |
| 14 | Timestamp Reply | [RFC792] |
| 15 | Information Request | [RFC792] |
| 16 | Information Reply | [RFC792] |
| 17 | Address Mask Request | [RFC950] |
| 18 | Address Mask Reply | [RFC950] |
| 19 | Reserved (for Security) | [Solo] |
| 20-29 | Reserved (for Robustness Experiment) | [ZSu] |
| 30 | Traceroute | [RFC1393] |
| 31 | Datagram Conversion Error | [RFC1475] |
| 32 | Mobile Host Redirect | [David_Johnson] |
| 33 | IPv6 Where-Are-You | [Simpson] |
| 34 | IPv6 I-Am-Here | [Simpson] |
| 35 | Mobile Registration Request | [Simpson] |
| 36 | Mobile Registration Reply | [Simpson] |
| 37 | Domain Name Request | [RFC1788] |
| 38 | Domain Name Reply | [RFC1788] |
| 39 | SKIP | [Markson] |
| 40 | Photuris | [RFC2521] |
| 41 | ICMP messages utilized by experimental mobility protocols such as Seamoby | [RFC4065] |
| 42-255 | Reserved | [JBP] |
Code Fields
Registration Procedures
IESG Approval or Standards Action
Reference
[RFC2939]
Note
Many of these ICMP types have a "code" field. Here we list the types again with their assigned code fields.
Type 0 - Echo Reply
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | No Code |
Type 1 - Unassigned
Reference
[JPB]
Registry is empty
Type 2 - Unassigned
Reference
[JPB]
Registry is empty
Type 3 — Destination Unreachable
Reference
[RFC792]
| Code | Description | Reference |
| 0 | Net Unreachable | [RFC792] |
| 1 | Host Unreachable | [RFC792] |
| 2 | Protocol Unreachable | [RFC792] |
| 3 | Port Unreachable | [RFC792] |
| 4 | Fragmentation Needed and Don't Fragment was Set | [RFC792] |
| 5 | Source Route Failed | [RFC792] |
| 6 | Destination Network Unknown | [RFC1122] |
| 7 | Destination Host Unknown | [RFC1122] |
| 8 | Source Host Isolated | [RFC1122] |
| 9 | Communication with Destination Network is Administratively Prohibited | [RFC1122] |
| 10 | Communication with Destination Host is Administratively Prohibited | [RFC1122] |
| 11 | Destination Network Unreachable for Type of Service | [RFC1122] |
| 12 | Destination Host Unreachable for Type of Service | [RFC1122] |
| 13 | Communication Administratively Prohibited | [RFC1812] |
| 14 | Host Precedence Violation | [RFC1812] |
| 15 | Precedence cutoff in effect | [RFC1812] |
Type 4 — Source Quench (Deprecated)
Reference
| Codes | Description | Reference |
| 0 | No Code |
Type 5 — Redirect
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | Redirect Datagram for the Network (or subnet) | |
| 1 | Redirect Datagram for the Host | |
| 2 | Redirect Datagram for the Type of Service and Network | |
| 3 | Redirect Datagram for the Type of Service and Host |
Type 6 — Alternate Host Address
Reference
[JBP]
| Codes | Description | Reference |
| 0 | Alternate Address for Host |
Type 7 - Unassigned
Reference
[JPB]
Registry is empty
Type 8 — Echo
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | No Code |
Type 9 — Router Advertisement
Reference
[RFC1256]
| Codes | Description | Reference |
| 0 | Normal router advertisement | [RFC3344] |
| 16 | Does not route common traffic | [RFC3344] |
Type 10 — Router Selection
Reference
[RFC1256]
| Codes | Description | Reference |
| 0 | No Code |
Type 11 — Time Exceeded
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | Time to Live exceeded in Transit | |
| 1 | Fragment Reassembly Time Exceeded |
Type 12 — Parameter Problem
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | Pointer indicates the error | |
| 1 | Missing a Required Option | [RFC1108] |
| 2 | Bad Length |
Type 13 — Timestamp
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | No Code |
Type 14 — Timestamp Reply
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | No Code |
Type 15 — Information Request
Reference
[RFC792]
| Codes | Description | Reference |
| 0 | No Code |
Type 16 — Information Reply
Reference
[RFC792]| Codes | Description | Reference |
| 0 | No Code |
Type 17 — Address Mask Request
Reference
[RFC950]| Codes | Description | Reference |
| 0 | No Code |
Type 18 — Address Mask Reply
Reference
[RFC950]| Codes | Description | Reference |
| 0 | No Code |
Type 19 — Reserved (for Security)
Reference
[Solo]
Registry is empty.