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Thomson Speedtouch series WLAN router firmware (.bli)

.bli file signature | application/octet-stream

Thomson Speedtouch series WLAN router firmware

Safe

Magic Bytes

Offset 0
42 4C 49 32 32 33

Sources: Gary Kessler

All Known Signatures

2 signature variants are documented for .bli files across multiple sources.

Hex Signature Offset Sources
42 4C 49 32 32 33 0 Gary Kessler
42 6C 69 6E 6B 20 62 79 20 44 2E 54 2E 53 0 Gary Kessler

Extension

.bli

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .bli files in Python

Python 
def is_bli(file_path: str) -> bool:
    """Check if file is a valid BLI by magic bytes."""
    signature = bytes([0x42, 0x4C, 0x49, 0x32, 0x32, 0x33])
    with open(file_path, "rb") as f:
        return f.read(6) == signature

How to validate .bli files in Node.js

Node.js 
function isBLI(buffer: Buffer): boolean {
  const signature = Buffer.from([0x42, 0x4C, 0x49, 0x32, 0x32, 0x33]);
  return buffer.subarray(0, 6).equals(signature);
}

How to validate .bli files in Go

Go 
func IsBLI(data []byte) bool {
    signature := []byte{0x42, 0x4C, 0x49, 0x32, 0x32, 0x33}
    if len(data) < 6 {
        return false
    }
    return bytes.Equal(data[:6], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .bli file?

A .bli file is a Thomson Speedtouch series WLAN router firmware file. Thomson Speedtouch series WLAN router firmware

What are the magic bytes for .bli files?

The magic bytes for Thomson Speedtouch series WLAN router firmware files are 42 4C 49 32 32 33 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .bli file?

To validate a .bli file, read the first bytes of the file and compare them against the known magic bytes (42 4C 49 32 32 33) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .bli files?

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

Is it safe to open .bli files?

Thomson Speedtouch series WLAN router firmware (.bli) 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.