# Error starting proxy server: OSError(49, "Can't assign requested address

**URL:** <https://discourse.mitmproxy.org/t/error-starting-proxy-server-oserror-49-cant-assign-requested-address/1444>\
**Category:** help\
**Created:** [March 1, 2019, 8:40am UTC](https://discourse.mitmproxy.org/t/error-starting-proxy-server-oserror-49-cant-assign-requested-address/1444 "2019-03-01T08:40:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![lzyADA](https://avatars.discourse-cdn.com/v4/letter/l/e68b1a/32.png) [@lzyADA](https://discourse.mitmproxy.org/u/lzyADA)\
**Post date:** [March 1, 2019, 8:40am UTC](https://discourse.mitmproxy.org/t/error-starting-proxy-server-oserror-49-cant-assign-requested-address/1444/1 "2019-03-01T08:40:47Z")

</div>

mitmproxy --listen-host xxxxxx -p xxxxxx . Will have such a problem Error starting proxy server: OSError(49, "Can’t assign requested address why?