NtCreateIRTimer
Other → NTSTATUS
NtCreateIRTimer 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 22 distinct values, from 0x009C to 0x0175.
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 | 0x016B (363) |
| Windows 10 1507 | x64 | 0x009F (159) |
| Windows 10 1511 | x86 | 0x016D (365) |
| Windows 10 1511 | x64 | 0x00A0 (160) |
| Windows 10 1607 | x86 | 0x016F (367) |
| Windows 10 1607 | x64 | 0x00A1 (161) |
| Windows 10 1703 | x86 | 0x0172 (370) |
| Windows 10 1703 | x64 | 0x00A4 (164) |
| Windows 10 1709 | x64 | 0x00A5 (165) |
| Windows 10 1709 | x86 | 0x0175 (373) |
| Windows 10 1803 | x86 | 0x0175 (373) |
| Windows 10 1803 | x64 | 0x00A6 (166) |
| Windows 10 1809 | x64 | 0x00A6 (166) |
| Windows 10 1809 | x86 | 0x0175 (373) |
| Windows 10 1903 | x64 | 0x00A7 (167) |
| Windows 10 1903 | x86 | 0x0175 (373) |
| Windows 10 1909 | x86 | 0x0175 (373) |
| Windows 10 1909 | x64 | 0x00A7 (167) |
| Windows 10 2004 | x86 | 0x0175 (373) |
| Windows 10 2004 | x64 | 0x00AB (171) |
| Windows 10 20H2 | x64 | 0x00AB (171) |
| Windows 10 20H2 | x86 | 0x0175 (373) |
| Windows 10 21H1 | x64 | 0x00AB (171) |
| Windows 10 21H1 | x86 | 0x0175 (373) |
| Windows 10 21H2 | x64 | 0x00AC (172) |
| Windows 10 21H2 | x86 | 0x0175 (373) |
| Windows 10 22H2 | x86 | 0x0175 (373) |
| Windows 10 22H2 | x64 | 0x00AC (172) |
| Windows 11 and Server 11 21H2 | x64 | 0x00AE (174) |
| Windows 11 and Server 11 22H2 | x64 | 0x00AF (175) |
| Windows 11 and Server 11 23H2 | x64 | 0x00AF (175) |
| Windows 11 and Server 11 24H2 | x64 | 0x00B1 (177) |
| Windows 11 and Server 11 25H2 | x64 | 0x00B1 (177) |
| Windows 11 and Server Server 2022 | x64 | 0x00AE (174) |
| Windows 11 and Server Server 2025 | x64 | 0x00B1 (177) |
| Windows 11 and Server Server 23H2 | x64 | 0x00B0 (176) |
| Windows 8 8.0 | x86 | 0x0161 (353) |
| Windows 8 8.0 | x64 | 0x009C (156) |
| Windows 8 8.1 | x86 | 0x0165 (357) |
| Windows 8 8.1 | x64 | 0x009D (157) |