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ICMP Types List

Article Index

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




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]


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