Help with Web from the same company external connection

[KatiaSisHost]

Hello, I have a web server on my ip 192.168.1.100 under DMZ ... with a Movistar WAN

I can access from the local network, I can access from the domains assigned to it and everything without problems, I can also access from other external connections of other companies, for example Fibertel ... BUT I cannot access from outside from other Movistar connections.