QUIC Versions

Register the use of a QUIC version here to avoid collisions. Note: These values are all defined in big endian.

Standard Space

The (WIP) QUIC specification reserves 0x00000001 to 0x0000ffff for standardized versions of the protocol. Don't use these for experimental versions. There is plenty of space available on a first-come, first-served basis.

FCFS Space

Version	Owner	Notes
0x00000000	n/a	This value is reserved as invalid
0x00000001	IETF	rfc9000
0x?a?a?a?a	IETF	Values meeting this pattern ((x&0x0f0f0f0f)==0x0a0a0a0a) are reserved for ensuring that version negotiation remains viable. Endpoints SHOULD use these values. Endpoints can expect that these versions will not be accepted by their peer.
0x454747[00-ff]	NetApp	quant
0x50435130	Private Octopus	Picoquic internal test version
0x5130303[1-9]	Google	Google QUIC 01 - 09 (Q001 - Q009)
0x5130313[0-9]	Google	Google QUIC 10 - 19 (Q010 - Q019)
0x5130323[0-9]	Google	Google QUIC 20 - 29 (Q020 - Q029)
0x5130333[0-9]	Google	Google QUIC 30 - 39 (Q030 - Q039)
0x5130343[0-9]	Google	Google QUIC 40 - 49 (Q040 - Q049)
0x5130353[0-9]	Google	Google QUIC 50 - 59 (Q050 - Q059)
0x51303939	Google	Google QUIC 99 (Q099)
0x5430343[8-9]	Google	Google QUIC with TLS 48 - 49 (T048 - T049)
0x5430353[0-9]	Google	Google QUIC with TLS 50 - 59 (T050 - T059)
0x54303939	Google	Google QUIC with TLS 99 (T099)
0x50524f58	Google	Proxied QUIC (PROX)
0x5c10000[0-f]	Anapaya	QUIC over SCION
0x51474f[0-255]	quic-go	"QGO" + [0-255]
0x91c170[0-255]	quicly	"qicly0" + [0-255]
0xabcd000[0-f]	Microsoft	MsQuic
0xf123f0c[0-f]	Mozilla	MozQuic
0xfaceb00[0-f]	Facebook	mvfst
0xff[000000-ffffff]	IETF	draft-ietf-quic-transport-xx
0xf0f0f0f[0-f]	ETH Zürich	Measurability experiments
0xf0f0f1f[0-f]	Telecom Italia	Measurability experiments
0xf0f0f2f[0-f]	quinn-noise	https://github.com/ipfs-rust/quinn-noise
0x0700700[0-f]	Tencent	TencentQuic