over last two or so months, cox internet is sucking (BR)

Internet and Wifi aren't the same thing. How's the wired connection doing?

quote:

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Any guesses as to why?

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Could be maintenance to overselling their capability in your area. Probably should call Cox and see if they are performing maintenance (they did it last year in our area and it was a huge pain) or if they've made any changes in your area recently.

Worst that happens is they come out and can't do anything in which case you know that it's on them and can act accordingly.

The first thing I would do is test multiple devices on the network. If they all are getting the same poor network speeds, then it's likely not an issue with a single device. Also, it can help to test the devices on other networks to further make sure that the devices are good.

I like to use https://www.speedtest.net for internet speed testing, and they have a mobile app for testing on mobile devices.

If the devices are fine, here are some basic troubleshooting steps for your network harware:

1) Power cycle router and modem
- unplug power cable from both
- plug MODEM back in and wait a few minutes for the startup sequence to complete
- plug router back in and wait a few minutes for the startup sequence to complete
- Test internet speeds

2) Connect computer directly to the modem via ethernet cable and test internet speed. If internet speeds are still poor, you need to call Cox to fix. If internet speeds improve, then it something with your router

3) plug computer directly into the a network port on the router via ethernet cable and test internet speed. If speeds are poor, something is wrong with your router. You can try a factory reset. Caution, this will wipe out any custom settings you've made. If speeds improve, then something is wrong with your wireless. A few things to try would be temporarily removing security from the wireless, creating a new SSID with mostly default settings, or resetting the router.

Consumer modems and routers just need to be restarted occasionally.

Sometimes the isp (Cox in your case) changes something on their network and needs the modem to grab a new IP address. It could also be, as LakeviewYakker mentioned, that Russian exploit that was in the news a couple of weeks ago.

You shouldn't have to do this often though. Maybe a few times a year.