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.
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
XnAP
Xn Application Protocol for gNB to gNB communication
F1AP
F1 Application Protocol for gNB-CU to gNB-DU 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