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Need for Speed: Underground Audio file (.ast)

.ast file signature | application/octet-stream

Need for Speed: Underground Audio file

Safe

Magic Bytes

Offset 0
53 43 48 6C

Sources: Gary Kessler

Extension

.ast

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .ast files in Python

Python 
def is_ast(file_path: str) -> bool:
    """Check if file is a valid AST by magic bytes."""
    signature = bytes([0x53, 0x43, 0x48, 0x6C])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .ast files in Node.js

Node.js 
function isAST(buffer: Buffer): boolean {
  const signature = Buffer.from([0x53, 0x43, 0x48, 0x6C]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .ast files in Go

Go 
func IsAST(data []byte) bool {
    signature := []byte{0x53, 0x43, 0x48, 0x6C}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

GET /api/v1/ast
curl https://filesignature.org/api/v1/ast

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .ast file?

A .ast file is a Need for Speed: Underground Audio file file. Need for Speed: Underground Audio file

What are the magic bytes for .ast files?

The magic bytes for Need for Speed: Underground Audio file files are 53 43 48 6C at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ast file?

To validate a .ast file, read the first bytes of the file and compare them against the known magic bytes (53 43 48 6C) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .ast files?

There is no officially registered MIME type for .ast files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .ast files?

Need for Speed: Underground Audio file (.ast) 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.