mcrypt v2 (.nc)
.nc file signature | application/x-netcdf
NetCDF (Network Common Data Form)generic files
Magic Bytes
Offset 0
43 44 46 01
Sources: Apache Tika, Gary Kessler
All Known Signatures
5 signature variants are documented for .nc files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 43 44 46 01 | 0 | Apache Tika, Gary Kessler |
| 43 44 46 02 | 0 | Apache Tika, Gary Kessler |
| 00 6D 02 | 0 | Gary Kessler |
| 00 6D 03 | 0 | Gary Kessler |
| 43 44 46 | 0 | Gary Kessler |
Extension
.nc
MIME Type
application/x-netcdf
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .nc files in Python
def is_nc(file_path: str) -> bool:
"""Check if file is a valid NC by magic bytes."""
signature = bytes([0x43, 0x44, 0x46, 0x01])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .nc files in Node.js
function isNC(buffer: Buffer): boolean {
const signature = Buffer.from([0x43, 0x44, 0x46, 0x01]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .nc files in Go
func IsNC(data []byte) bool {
signature := []byte{0x43, 0x44, 0x46, 0x01}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/nc
curl https://filesignature.org/api/v1/nc
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .nc file?
A .nc file is a mcrypt v2 file. NetCDF (Network Common Data Form)generic files
What are the magic bytes for .nc files?
The magic bytes for mcrypt v2 files are 43 44 46 01 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .nc file?
To validate a .nc file, read the first bytes of the file and compare them against the known magic bytes (43 44 46 01) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .nc files?
The primary MIME type for .nc files is application/x-netcdf.
Is it safe to open .nc files?
mcrypt v2 (.nc) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.