The Crisis Center is an organization local to Birmingham, but there are many similar organizations around the country. Though I can't speak for national call centers, since the election, the Birmingham Crisis Center has experienced a much higher than normal volume of calls. Per their website, their mission is "to serve the unmet needs of people experiencing personal crisis or mental health issues and respond with services that promote coping, emotional health and well-being."
In addition to their Crisis Line, they also offer services for rape response, teens, kids, and seniors. Rape Response is an extremely valuable asset for Birmingham, and has a specially trained nurse on site 24/7.
If you're interested in getting involved, they take donations here. They're constantly in need of volunteers at the crisis line. In case you need their care, their main number is 205-323-7777.
This is part of a series on organizations that will fight tooth and nail to protect the rights of all. If you are looking for resources on allyship other than organizations you can support, check out this list.