| Name | Metaprefix | URI |
|---|---|---|
| ISO Object Identifier | oid |
http://oid-info.com/get/2 |
| Bioregistry | bioregistry |
https://bioregistry.io/oid:2 |
| Identifiers.org | miriam |
https://identifiers.org/oid:2 |
| Name-to-Thing | n2t |
https://n2t.net/oid:2 |