3GPP Protocol Decoder

The world's best tool for decoding and encoding 3GPP protocols. Support for S1AP, NGAP, X2AP, RRC, NAS, and GTP protocols with full ASN.1 PER encoding.

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Supported Protocols

S1AP

S1 Application Protocol for 4G LTE networks

NGAP

NG Application Protocol for 5G NR networks

X2AP

X2 Application Protocol for eNB to eNB communication

RRC

Radio Resource Control protocol

NAS

Non-Access Stratum protocol

GTP

GPRS Tunneling Protocol

Features

ASN.1 PER Decoding

Full support for ASN.1 Packed Encoding Rules

Real-time Processing

All decoding happens in your browser

4G & 5G Support

Complete LTE and NR protocol coverage

Free & Open

Free to use with source code available

How It Works

1

Enter hex string

2

Select protocol

3

View decoded result