NetGear-
Support Website: https://www.netgear.com/support/
Customer service: 1 (888) 638-4327
Linksys-
Support Website: https://www.linksys.com/linksys-support
Customer Service: 1 (800) 326-7114
TP-Link-
Support Website: https://www.tp-link.com/us/support/
Customer Service: 1-866-225-8139
Cisco-
Support Website: https://www.cisco.com/support/
Customer Service: 1-800-553-2447