IPhone push notifications suddenly not working?

This started about 5 days ago and I have never had this problem before. I suddenly have ZERO notifications coming and have to manually go to any apps/mail/texts to find that I have updates there that weren't sent to me.

All of my notifications + alert styles are turned on for each app, tried restarting, signing out of the app store, Do Not Disturb is off… What else can I do?
My iPhone 6s is up to date (ver 10.3.2) but the strange thing is that I also use an old iPhone 5 (using an old iOS) for a couple apps, and the notifications stopped there too on the exact same night. Same issue with my sister's iPhone, which was updated to latest iOS yesterday with no change.

Is this a Wi-Fi issue or is there something else?

Using android device would solve this.

  • Why won't my push notifications on Facebook for my iPhone 4 S work properly? Someone please help me, I have an iPhone for S running the latest version of IOS6 every time I get a notification it shows with a red bible and a number on the app icon but it won't show a banner on the home or lock screen and it won't come up on the notification centre please help I have tried everythin
  • Why doesn't my iPhone 3GS Push notifications work? My fiancé got me a used 3GS (times are hard) and ever since I've gotten it my notifications will not work. The notification buttons are all on. Even when I turn them off and then back on they still won't work. My fiancé is a computer wiz and told me not to restore my iPhone what so ever. Everything is on and sound is great just the push notifications won't work.
  • What is push notification or push messaging? I recently bought a new iPhone. I'm trying to find good apps that fits to my everyday work. I discovered this push messaging apps. Is this apps safe to use? What is the benefit of this application?
  • Push Notifications, iPhone 4S? How do you get push notifcations for Tumblr? Like, when someone reblogs something, likes something, asks a question follows you, is there a way I can get my iphone to notify me without actually having to click on the app?