How Izzit Down? works

What it watches

170 services in 13 groups: 🚇 MRT & LRT, 🚕 Transport, 📶 Telcos (mobile), 🏠 ISPs (home broadband), 🏦 Banks, 💳 Payments & investing, 🏛️ Government, 💬 Social & messaging, 🛒 Shopping, delivery & parcels, 🎮 Streaming & gaming, 💼 Work, school & AI, ✈️ Travel, 🌐 Internet infrastructure. Missing one you use? Tell us.

Where the status comes from

• Official sources, read every minute: LTA DataMall’s train service alerts for every MRT and LRT line; the companies’ own status pages (Atlassian Statuspage: Discord, Reddit, ChatGPT, Cloudflare, GitHub and others); Apple’s, Google Workspace’s, Google Cloud’s, AWS’s, Slack’s and PlayStation’s status feeds.
• Our own checks from Singapore: what a service can’t work without (its web app, its login, its app servers) is requested every minute from our server in Singapore. It’s called down only after three failures in a row, with our control sites still answering, so a blip or a bot wall isn’t an outage. A company’s own website is checked too and shown on its page, but never decides its status: a bank’s or telco’s home page being down doesn’t mean its app, cards or network are.
• Internet measurements from IODA for the telcos’ mobile networks and the ISPs’ broadband networks, watched apart: when a network’s addresses stop answering or its routes vanish, that shows here.
• People’s reports: the “It’s down for me” button on each page and /down in the bot. Five different people in 30 minutes and the page says people are reporting problems; fifteen and it’s called down and posted to the channel.
• News and forums: Singapore headlines naming a service with an outage word, and posts on r/singapore, r/askSingapore and HardwareZone’s EDMW forum asking whether it’s down, are shown on its page. For a service we have nothing else for (a bank whose app we can’t probe, the smaller mobile brands), one fresh source is “problems reported” and two (a second newsroom, a forum behind a headline, two forums) is “down”; it lapses a few hours later unless a newer headline says it’s restored.

The Telegram channel and bot

@IzzitDown posts every incident of an essential service (trains, telcos, banks, government, payments), outages and lasting problems of popular apps, and major outages of the clouds many apps run on; and when each is back, with how long it took. @IzzitDown_Bot lets you pick the services you care about with /subscribe, check one by typing its name, and report one with /down.

Data and privacy

The site stores no account and no cookies. A report is kept as a one-way hash of your address and browser for the day, so each person counts once. The bot keeps your chat id and your subscriptions, and nothing else; /unsubscribe all deletes them.

Status is free to reuse: status.json (everything, every minute), incidents.json, /izzitdown/api/service/<id>.json and the RSS feed of incidents.