| Name | Abbreviation | Date | Head office | IACS member? |
| Lloyd's Register of Shipping |
LR |
1760 |
London [6] |
Yes |
| Bureau Veritas |
BV |
1828 |
Paris |
Yes |
| Registro Italiano Navale |
RINA |
1861 |
Genoa |
Yes |
| American Bureau of Shipping |
ABS |
1862 |
Houston |
Yes |
| Det Norske Veritas |
DNV |
1864 |
Oslo |
Yes |
| Germanischer Lloyd |
GL |
1867 |
Hamburg |
Yes |
| Nippon Kaiji Kyokai |
NKK |
1899 |
Tokyo |
Yes |
Russian Maritime Register of Shipping
(Российский морской регистр судоходства) |
RS |
1913 |
Saint Petersburg |
Yes |
| Hellenic Register of Shipping |
HR |
1919 |
Piraeus |
No |
| Polish Register of Shipping |
PRS |
1936 |
Gdansk |
Yes |
| Croatian Register of Shipping |
CRS |
1949 |
Split |
Yes |
| China Corporation Register of Shipping |
CR |
1951 |
Taipei |
No |
| China Classification Society |
CCS |
1956 |
Beijing |
Yes |
| Korean Register of Shipping |
KR |
1960 |
Daejeon |
Yes |
| Turk Loydu |
TL |
1962 |
Istanbul |
No |
| Biro Klasifikasi Indonesia |
BKI |
1964 |
Jakarta |
No |
| Registo Internacional Naval[7] |
RINAVE |
1973 |
Lisbon |
No |
| Indian Register of Shipping |
IRS |
1975 |
Mumbai |
Yes |
| International Naval Surveys Bureau |
INSB |
1977 |
Piraeus |
No |
| Asia Classification Society |
ACS |
1980 |
Tehran |
No |
| Brazilian Register of Shipping |
RBNA |
1982 |
Rio de Janeiro |
No |
| International Register of Shipping |
IROS |
1993 |
Miami |
No |
| Ships Classification Malaysia |
SCM |
1994 |
Shah Alam |
No |
| Isthmus Bureau of Shipping |
IBS |
1995 |
Panama |
No |
| Dromon Bureau of Shipping |
DBS |
2003 |
Limassol |
No |
| Intermaritime Certification Services |
ICS Class |
2005 |
Panama |
No |
| Iranian Classification Society |
ICS |
2007 |
Tehran |
No |
