IPv4 not working, but IPv6 is

Hi, I'm experiencing issues with internet connectivity.  I noticed I am able to connect to IPv6 addresses online, but not IPv4.  I suspect this issue might be caused by my removing my static IP after getting a new Comcast Business contract at a new address, but using the old modem from my prior contract with the static IP still on it.

The IPv4 of the modem is 50.247.103.74

WAN Internet IP Address 50.247.103.74

Static IP Block 50.247.103.72/30

$ traceroute6 google.com
traceroute6 to google.com (2607:f8b0:4005:800::200e) from 2601:645:8203:a600:216a:79a1:a9a3:6a73, 64 hops max, 12 byte packets
1 *
2601:645:8203:a600:eafc:afff:fee8:ed6b 0.414 ms 0.405 ms
2 2001:558:4000:5::1 7.923 ms 7.578 ms 7.467 ms
3 te-0-7-0-5-sur04.sffolsom.ca.sfba.comcast.net 7.582 ms 8.346 ms 7.713 ms
4 be-309-ar01.hayward.ca.sfba.comcast.net 10.319 ms 9.657 ms 10.851 ms
5 he-0-19-0-1-ar01.santaclara.ca.sfba.comcast.net 11.126 ms
he-0-19-0-0-ar01.santaclara.ca.sfba.comcast.net 10.120 ms
he-0-0-0-0-ar01.santaclara.ca.sfba.comcast.net 9.780 ms
6 be-33651-cr01.sunnyvale.ca.ibone.comcast.net 9.850 ms 9.862 ms 8.818 ms
7 *
he-0-12-0-0-pe02.529bryant.ca.ibone.comcast.net 10.317 ms
he-0-10-0-0-pe02.529bryant.ca.ibone.comcast.net 14.909 ms
8 2001:559::8ce 9.739 ms 10.137 ms 10.537 ms
9 2001:4860::1:0:c1af 10.463 ms 15.593 ms 10.812 ms
10 2001:4860:0:1::691 10.778 ms 10.488 ms 10.660 ms
11 nuq05s01-in-x0e.1e100.net 10.607 ms 10.462 ms 31.754 ms

$ traceroute google.com
traceroute to google.com (172.217.2.46), 64 hops max, 52 byte packets
1 10.1.10.1 (10.1.10.1) 0.595 ms 0.329 ms 0.255 ms
2 * * *
3 96.120.89.233 (96.120.89.233) 7.647 ms 7.394 ms 6.976 ms
4 te-0-7-0-4-sur04.sffolsom.ca.sfba.comcast.net (162.151.30.185) 9.351 ms 7.877 ms 8.001 ms
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *