ISO-codes

Prefix + serial number + check digit
Country code + iso code

First size code character depends on container length:
Character	Container length
	mm	ft	in


1	2,991	10	-
2	6,058	20	-
3	9,125	30	-
4	12,192	40	-
5	unassigned	-	-
6	unassigned	-	-
7	unassigned	-	-
8	unassigned	-	-
9	unassigned	-	-
A	7,150	-	-
B	7,315	24	-
C	7,430	24	-
D	7,450	-	6
E	7,820	-	-
F	8,100	-	-
G	12,500	41	-
H	13,106	43	-
K	13,600	-	-
L	13,716	45	-
M	14,630	48	-
N	14,935	49	-
P	16,154	-	-
R	unassigned	-	-

Second size code character depends on container height combined with the width:
Container width	Character	Container height			Character for container width
		mm	ft	in	>2438mm and <2500mm	>2500mm


2,438/ 8'	0	2 438	8
2,438/ 8'	2	2 591	8	6	C	L
2,438/ 8'	4	2 743	9		D	M
2,438/ 8'	5	2 895	9	6	E	N
2,438/ 8'	6	>2 895	9	6	F	P
2,438/ 8'	8	1 295	4	3
2,438/ 8'	9	=<1 219	4

The third and fourth character depends on container type and can be a group code designation or a detailed type code designation:

Code

Group code

Type

Type code

Principal characteristics

Unventilated general purpose container

Openings at one or both ends

Vents in upper part of cargo space

Openings at one or both end(s), plus "full" openings at one or both sides

Openings at one or both end(s), plus "partial" openings at one or both sides

Spare

General purpose containers with ventilation

Non-mechanical ventilation at the lower and upper parts of the cargo space

Spare

Mechanical ventilation installed in the container

Spare

Mechanical ventilation installed outside the container

Spare

Dry bulk containers, non-pressure-resistant

Closed

Airtight

Pressurized

Spare

Horizontal discharge, test pressure 150 kPa

Horizontal discharge, test pressure 265 kPa

Tipping discharge, test pressure 150 kPa

Tipping discharge, test pressure 265 kPa

Spare

Named cargo containers

Livestock container

Automobile container

Living fish container

Spare

Thermal containers

Mechanically refrigerated

- refrigerated

- refrigerated and heated

- self powered refrigerated/heated

Mechanically refrigerated and heated

Mechanically refrigerated

Mechanically refrigerated and heated

Spare

Thermal containers

Refrigerated and/or heated with removable equipment located externally, coefficient of heat transfer K=0.4 W/(m2.K)

- refrigerated and/or heated with removable equipment

Refrigerated and/or heated with removable equipment located internally

Refrigerated and/or heated with removable equipment located externally, coefficient of heat transfer K=0.7 W/(m2.K)

Spare

Insulated, coefficient of heat transfer K=0.4 W/(m2.K)

Insulated, coefficient of heat transfer K=0.7 W/(m2.K)

Spare

Open-top containers

Opening(s) at one or both end(s)

Opening(s) at one or both end(s) plus removable roof in end frame

Opening(s) at one of both end(s) plus opening(s) on one or both sides

Opening(s) at one or both end(s) plus opening(s) on one or both sides plus removable top members

Opening(s) at one or both end(s) plus opening(s) on one side plus full openings on the other side

Full, solid side and end walls (no doors)

Spare

Platform (container)

Platform

- platform based on containers with incomplete superstructure

- fixed

- folding

- platform based containers with complete superstructure

Platform with two complete, fixed end walls

Platform with fixed posts, either free-standing or with removable top members

Platform with folding complete end walls

Platform with folding posts, either free-standing or with removable top members

Platform, open at the top and ends (skeletal)

Spare

Tank container for non-dangerous liquids

Minimum pressure 45 kPa

Minimum pressure 150 kPa

Minimum pressure 265 kPa

Tank container for dangerous liquids

Minimum pressure 150 kPa

Minimum pressure 265 kPa

Minimum pressure 400 kPa

Minimum pressure 600 kPa

Tank container for gases

Minimum pressure 910 kPa

Minimum pressure 2 200 kPa

Minimum pressure (yet to be assigned)

Air/surface containers