Most customers who signed up for internet service prior to July 1, 2020 have the GigaCenter .
The U6 has 4 Ethernet ports and one WAN port on the back.
GigaSpire U6x and U6xw
The U6x has 4 Ethernet ports on the back. Our unit is gray.
The U12 has one Ethernet port and one WAN port on the back.