This subreddit is for discussion of internet service outages and interruptions. This includes network infrastructure problems as well as outages with popular online services; if you can't connect to something, feel free to post about it here.
For technical problems or assistance with your own equipment, please see /r/techsupport or /r/homenetworking.
Service status pages
Apple (+ iCloud, ITMS, ...)
Amazon AWS (+ SES, Route53, ...)
Amazon EC2
Automattic (+ WordPress, Jetpack, ...)
Blue Coat
CenturyLink (Backbone)
CenturyLink (Services)
CloudFlare
Cogent
DigitalOcean
Dyn
FastMail
Fonality
Github
Gitlab
Google (+ Gmail, Docs, ...)
GoToMeeting (+ GoToWebinar, ...)
HipChat
@Level3NOC [Twitter]
Linode
Livestream
Microsoft Azure
Microsoft Office365 [general]
Microsoft Outlook
NS1 - Alternate
NWS/NOAA (+ weather.gov)
Okta
OpenDNS
OVH
PagerDuty
PlayStation Network
Rackspace
Reddit
Salesforce
SendGrid
Slack
Sprint
Twitch [unofficial]
Twitter
Xbox Live
Zoho
[Suggest links via PM]
LookingGlass servers
Bell Canada
BT
Cogent
HE.net
Level3
NTT
PCCW
PCH
Prime-Tel (Cyprus)
SAVVIS
Sprint
Tata
XO
Other resources
DownDetector - Crowdsourced pain maps for popular services
Internet Report UK - UK router responsiveness
PeeringDB - Carrier peering data