NtAddAtomEx
Other → NTSTATUS
NtAddAtomEx is a Windows NT kernel system call, in the Other category, returning NTSTATUS. Its syscall number is not the same on every Windows release: across the 40 version-and-architecture pairs recorded here it takes 12 distinct values, from 0x0067 to 0x01C2.
The number is an index into the system service table of one particular build, not a stable identifier, so it is not portable between Windows versions or between x64 and x86. The table below gives the value recorded for each.
Numbers across OS versions (40)
| OS Version | Architecture | Number |
|---|---|---|
| Windows 10 1507 | x86 | 0x01B1 (433) |
| Windows 10 1507 | x64 | 0x0067 (103) |
| Windows 10 1511 | x86 | 0x01B4 (436) |
| Windows 10 1511 | x64 | 0x0067 (103) |
| Windows 10 1607 | x86 | 0x01B6 (438) |
| Windows 10 1607 | x64 | 0x0067 (103) |
| Windows 10 1703 | x86 | 0x01BB (443) |
| Windows 10 1703 | x64 | 0x0068 (104) |
| Windows 10 1709 | x64 | 0x0068 (104) |
| Windows 10 1709 | x86 | 0x01BF (447) |
| Windows 10 1803 | x86 | 0x01BF (447) |
| Windows 10 1803 | x64 | 0x0068 (104) |
| Windows 10 1809 | x64 | 0x0068 (104) |
| Windows 10 1809 | x86 | 0x01BF (447) |
| Windows 10 1903 | x64 | 0x0068 (104) |
| Windows 10 1903 | x86 | 0x01BF (447) |
| Windows 10 1909 | x86 | 0x01BF (447) |
| Windows 10 1909 | x64 | 0x0068 (104) |
| Windows 10 2004 | x86 | 0x01C1 (449) |
| Windows 10 2004 | x64 | 0x0069 (105) |
| Windows 10 20H2 | x64 | 0x0069 (105) |
| Windows 10 20H2 | x86 | 0x01C1 (449) |
| Windows 10 21H1 | x64 | 0x0069 (105) |
| Windows 10 21H1 | x86 | 0x01C1 (449) |
| Windows 10 21H2 | x64 | 0x0069 (105) |
| Windows 10 21H2 | x86 | 0x01C2 (450) |
| Windows 10 22H2 | x86 | 0x01C2 (450) |
| Windows 10 22H2 | x64 | 0x0069 (105) |
| Windows 11 and Server 11 21H2 | x64 | 0x0069 (105) |
| Windows 11 and Server 11 22H2 | x64 | 0x0069 (105) |
| Windows 11 and Server 11 23H2 | x64 | 0x0069 (105) |
| Windows 11 and Server 11 24H2 | x64 | 0x0069 (105) |
| Windows 11 and Server 11 25H2 | x64 | 0x0069 (105) |
| Windows 11 and Server Server 2022 | x64 | 0x0069 (105) |
| Windows 11 and Server Server 2025 | x64 | 0x0069 (105) |
| Windows 11 and Server Server 23H2 | x64 | 0x0069 (105) |
| Windows 8 8.0 | x86 | 0x01A4 (420) |
| Windows 8 8.0 | x64 | 0x0067 (103) |
| Windows 8 8.1 | x86 | 0x01A9 (425) |
| Windows 8 8.1 | x64 | 0x0067 (103) |