Tools/Info:ICMP Types

ICMP TYPE NUMBERS

(last updated 2008-02-13)

Registries included below:
- ICMP Type Numbers
- Code Fields
- ICMP Extension Objects Classes


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      [RFC792]
5 Redirect     [RFC792]
6 Alternate Host Address       [JBP]
7 Unassigned        [JBP]
8 Echo      [RFC792]

More can be found in IANA