5G/NR
- RRC - Radio Resource Control
- RLC - Radio Link Control
- MAC - Medium Access Control
- PDCP - Packet Data Convergence Protocol
- NAS - Non-Access Stratum
3GPP Decoder Online - Free 5G, LTE, UMTS and GSM Message Decoder
3GPP Decoder is a online tool to decode HEX encoded 5G/NR, LTE, UMTS and GSM messages to human readable format.
Raw Decode Output
Decoded Summary
Payload Hex: N/A
Payload ASCII: N/A
No decoded fields yet. Select options and decode a message.
Supported Protocols
LTE
- RRC - Radio Resource Control
- RLC - Radio Link Control
- MAC - Medium Access Control
- PDCP - Packet Data Convergence Protocol
- NAS - Non-Access Stratum
UMTS
- RRC - Radio Resource Control
- RLC - Radio Link Control
- MAC - Medium Access Control
- NAS - Non-Access Stratum
GSM
- RR - Radio Resource
- RLC/MAC - Radio Link and Medium Access Control
- NAS - Non-Access Stratum
Sample Header Decode
NAS Header
| Field | Value |
|---|---|
| Extended Protocol Discriminator | 0x7e (5G Mobility Management (5GMM)) |
| Security Header Type | 0 (Plain 5GS NAS) |
| Message Type | 0x41 (Registration Request) |
How to use the 3GPP Decoder
- Enter the HEX string in the top text box.
- Select the access technology (LTE, UMTS or GSM). By default when the program starts it is selected as LTE
- Select the message type from the drop down combo box
- Press decode.