Offer arrived, can I still ask for more? after 4 years as a call-centre agent

I received an offer as a call-centre agent and I think the pay is a little low. This is my first time dealing with any of this. The benefits are decent. Did it backfire?

Ask about the range, not a number on its own. It felt more collaborative.

If they say no, consider asking for something else, such as a review in six months.