There’s no complete list of every website that’s blocked in Nigeria, and often, these restrictions only apply for a short time. However, the government has previously blocked access to:
Twitter
News outlets with unfavorable coverage
Websites of activism and non-profit groups
Pro-Biafra content
It’s important to recognize that new restrictions could be implemented at any time without a valid cause. As such, you may want to consider using a VPN to keep your online activities private and ensure access to the wider internet should one of your regular sites become inaccessible.