/
3D
gQR
Post
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
What?
Who?
/
3D
gQR
Post
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
What?
Who?
426
Upgrade Required
http-status-codes
426
The server refuses to perform the request using the current protocol but might be willing to do so after the client upgrades to a different protocol. The server sends an Upgrade header in a 426 response to indicate the required protocol(s).
More HTTP Codes:
Prev
Next