Internet keeps dropping

Start with the modem's signal stats. Perhaps they already are, or they are close to being out of spec and intermittently they go completely of spec. Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?

Model: TG1682G

Make: ARRIS Group, Inc.

It is happening on both wireless and wired (ethernet) connections.

Upstream power level:

Downstream power level and Signal to Noise:

Same thing happening here.  It has been terrible for weeks but today they did a 12 hour maintance fix in this area and it has gotten 10X worse.  I spent an hour on hold waiting for a service rep that put an order in for a new modemn.  I think this is much bigger than a new modemn.  I have been a loyal comcast customer since 1992.  I am nearing my breaking point.

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I tried to have a technician scheduled but Comcast said that they are not sending technicians out currently.  I guess I will check if AT&T is sending techs since fiber is in our neighborhood.  I hate to leave Comcast but with connection not reliable for work or school, I don't have an option.  They are suppose to be sending a new modemn but I think you are right....it's a bad splitter or something more on those lines.  

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Mine was doing that for awhile, the only fix finally  was outside rewiring from house box to telephone pole box.  A squirrel or bird or something had chewed through the wire in the 7 years it was there and exposed it to high and low temperatures.  Also, during Covid, they will tell you they won't send somebody out but say you want to talk to a supervisor and complain enough and they will eventually.