https://siteupdown.com/help/Plain-English guides to website outages, error codes, DNS, speed and uptime.en-gbhttps://siteupdown.com/help/online-banking-or-payment-site-not-workinghttps://siteupdown.com/help/online-banking-or-payment-site-not-workingMon, 02 Nov 2026 09:00:00 +0000How to handle a bank, card or checkout page that will not load or errors mid-payment, without double paying or falling for scams.https://siteupdown.com/help/how-to-test-your-internet-speed-properlyhttps://siteupdown.com/help/how-to-test-your-internet-speed-properlyMon, 02 Nov 2026 09:00:00 +0000Why speed test results vary, how to get a fair reading, and what download, upload, latency and jitter mean for everyday use.https://siteupdown.com/help/what-is-an-ip-addresshttps://siteupdown.com/help/what-is-an-ip-addressMon, 02 Nov 2026 09:00:00 +0000A plain explanation of IP addresses: public and private, IPv4 and IPv6, how websites see yours, what it reveals, and what it does not.https://siteupdown.com/help/streaming-keeps-bufferinghttps://siteupdown.com/help/streaming-keeps-bufferingMon, 02 Nov 2026 09:00:00 +0000How to tell whether buffering comes from the streaming service, your Wi-Fi, your internet plan or your device, with speeds needed for HD and 4K.https://siteupdown.com/help/social-media-app-not-loadinghttps://siteupdown.com/help/social-media-app-not-loadingMon, 02 Nov 2026 09:00:00 +0000A clear guide to social media outages: the difference between the app, the feed and messages failing, and what to try on your phone before you blame the service.https://siteupdown.com/help/ai-chatbot-or-ai-tool-not-workinghttps://siteupdown.com/help/ai-chatbot-or-ai-tool-not-workingMon, 02 Nov 2026 09:00:00 +0000Why AI chat tools slow down, error out or stop answering, how to tell an outage from a problem on your side, and what to do while you wait.https://siteupdown.com/help/website-changes-not-showinghttps://siteupdown.com/help/website-changes-not-showingMon, 02 Nov 2026 09:00:00 +0000The layers of caching between you and your visitors, how to find which one is holding an old version, and how to clear each safely.https://siteupdown.com/help/website-blocked-in-your-countryhttps://siteupdown.com/help/website-blocked-in-your-countryMon, 02 Nov 2026 09:00:00 +0000How to tell whether a site is blocked by your network, your country or the site itself, what the different errors suggest and what is reasonable to do.https://siteupdown.com/help/how-to-choose-reliable-web-hostinghttps://siteupdown.com/help/how-to-choose-reliable-web-hostingMon, 02 Nov 2026 09:00:00 +0000What to look for in a web host if uptime matters: uptime promises, support, backups, location, scaling and the questions to ask before you sign up.https://siteupdown.com/help/wifi-keeps-disconnectinghttps://siteupdown.com/help/wifi-keeps-disconnectingMon, 02 Nov 2026 09:00:00 +0000Why a Wi-Fi connection drops again and again, how to tell whether the router, the device or the provider is at fault, and what to try in order.https://siteupdown.com/help/uptime-alerts-without-alert-fatiguehttps://siteupdown.com/help/uptime-alerts-without-alert-fatigueMon, 02 Nov 2026 09:00:00 +0000Practical rules for monitoring alerts that people actually act on: what to check, how often, how many failures to wait for, and who to tell.https://siteupdown.com/help/how-to-use-a-status-pagehttps://siteupdown.com/help/how-to-use-a-status-pageMon, 02 Nov 2026 09:00:00 +0000What company status pages show, how to read the wording, what they leave out, and how to combine them with independent checks.https://siteupdown.com/help/what-is-a-load-balancerhttps://siteupdown.com/help/what-is-a-load-balancerMon, 02 Nov 2026 09:00:00 +0000How load balancers share traffic between servers, how health checks keep broken servers out of rotation, and what to know when setting one up.https://siteupdown.com/help/what-is-bgp-and-why-it-mattershttps://siteupdown.com/help/what-is-bgp-and-why-it-mattersMon, 02 Nov 2026 09:00:00 +0000How the internet decides where to send traffic, what the Border Gateway Protocol does, and why a routing error can make big services unreachable for hours.https://siteupdown.com/help/err-too-many-redirectshttps://siteupdown.com/help/err-too-many-redirectsMon, 02 Nov 2026 09:00:00 +0000What a redirect loop is, why browsers say "too many redirects" or "redirected you too many times", and how to fix it as a visitor or site owner.https://siteupdown.com/help/what-is-a-ddos-attackhttps://siteupdown.com/help/what-is-a-ddos-attackMon, 02 Nov 2026 09:00:00 +0000A plain-English explanation of distributed denial-of-service attacks: how they work, why they cause outages, how sites defend themselves and what you can do as a visitor.https://siteupdown.com/help/website-and-network-terms-glossaryhttps://siteupdown.com/help/website-and-network-terms-glossaryMon, 02 Nov 2026 09:00:00 +0000Short, clear definitions of the terms you meet when a website or connection misbehaves, from DNS and latency to CDNs and TLS.https://siteupdown.com/help/email-not-working-checklisthttps://siteupdown.com/help/email-not-working-checklistMon, 02 Nov 2026 09:00:00 +0000How email delivery depends on DNS records such as MX, SPF and DKIM, and a step-by-step checklist for finding out why messages are missing.https://siteupdown.com/help/game-or-online-service-not-workinghttps://siteupdown.com/help/game-or-online-service-not-workingMon, 02 Nov 2026 09:00:00 +0000A practical guide for gamers and app users to work out whether a game server is down, whether lag is your connection, and what to try first.https://siteupdown.com/help/how-https-and-certificates-workhttps://siteupdown.com/help/how-https-and-certificates-workMon, 02 Nov 2026 09:00:00 +0000What the padlock really means, how certificates are issued and checked, why they expire, and how to avoid a certificate outage.https://siteupdown.com/help/vpns-and-websites-that-stop-workinghttps://siteupdown.com/help/vpns-and-websites-that-stop-workingMon, 02 Nov 2026 09:00:00 +0000How VPNs change where your traffic comes from, why some sites block them or load slowly, and a checklist for fixing problems.https://siteupdown.com/help/how-to-change-your-dns-serverhttps://siteupdown.com/help/how-to-change-your-dns-serverMon, 02 Nov 2026 09:00:00 +0000Step-by-step instructions for switching to a public DNS resolver on Windows, Mac, iPhone, Android and your home router, and how to undo it.https://siteupdown.com/help/how-to-write-an-outage-updatehttps://siteupdown.com/help/how-to-write-an-outage-updateMon, 02 Nov 2026 09:00:00 +0000A practical guide for site owners on what to say when your site or service is down, with templates and the mistakes to avoid.https://siteupdown.com/help/website-works-in-one-browser-not-anotherhttps://siteupdown.com/help/website-works-in-one-browser-not-anotherMon, 02 Nov 2026 09:00:00 +0000Why a site can load on one browser, phone or network but fail on another, and a quick way to find the cause: cache, extensions, VPNs, DNS and more.https://siteupdown.com/help/how-websites-stay-uphttps://siteupdown.com/help/how-websites-stay-upMon, 02 Nov 2026 09:00:00 +0000The ideas behind reliable websites, including redundancy, load balancing, failover, backups and testing, explained without jargon.https://siteupdown.com/help/how-to-read-a-traceroutehttps://siteupdown.com/help/how-to-read-a-tracerouteMon, 02 Nov 2026 09:00:00 +0000What a traceroute shows, how to read the hops and times, why stars are not always a problem, and how to use the results when talking to support.https://siteupdown.com/help/latency-packet-loss-and-jitter-explainedhttps://siteupdown.com/help/latency-packet-loss-and-jitter-explainedMon, 02 Nov 2026 09:00:00 +0000What ping, packet loss and jitter mean, why they matter for games and video calls even when speed is fine, and how to test for them.https://siteupdown.com/help/is-it-my-wifi-router-or-isphttps://siteupdown.com/help/is-it-my-wifi-router-or-ispMon, 02 Nov 2026 09:00:00 +0000A simple method to tell whether an internet problem lives in your Wi-Fi, your router, your provider or the website you are visiting.https://siteupdown.com/help/why-is-my-internet-slowhttps://siteupdown.com/help/why-is-my-internet-slowMon, 02 Nov 2026 09:00:00 +0000Work out whether slow internet is your Wi-Fi, your router, your provider or the website, with a short series of tests that each rule something out.https://siteupdown.com/help/major-internet-outages-explainedhttps://siteupdown.com/help/major-internet-outages-explainedMon, 02 Nov 2026 09:00:00 +0000Real examples of large outages, including Facebook in 2021, AWS in 2025 and Cloudflare in 2025, and the lessons that repeat from one to the next.https://siteupdown.com/help/what-is-a-cdn-and-why-outages-spreadhttps://siteupdown.com/help/what-is-a-cdn-and-why-outages-spreadMon, 02 Nov 2026 09:00:00 +0000How content delivery networks work, why so many sites depend on a few providers, and what that means when one of them has a bad day.https://siteupdown.com/help/what-is-dns-and-why-it-failshttps://siteupdown.com/help/what-is-dns-and-why-it-failsMon, 02 Nov 2026 09:00:00 +0000A plain-English explanation of the Domain Name System, how lookups are cached, the common ways DNS breaks, and how to tell a DNS fault from a down website.https://siteupdown.com/help/what-happens-when-you-open-a-websitehttps://siteupdown.com/help/what-happens-when-you-open-a-websiteMon, 02 Nov 2026 09:00:00 +0000From typing an address to seeing a page: how DNS, connections, encryption and servers fit together, and where each step can fail.https://siteupdown.com/help/how-to-monitor-your-own-websitehttps://siteupdown.com/help/how-to-monitor-your-own-websiteMon, 02 Nov 2026 09:00:00 +0000A practical guide for site owners: what to monitor, how often to check, how to avoid false alarms and what to do when an alert arrives.https://siteupdown.com/help/what-to-do-when-an-app-or-service-is-downhttps://siteupdown.com/help/what-to-do-when-an-app-or-service-is-downMon, 02 Nov 2026 09:00:00 +0000A calm checklist for when a popular app or service is not working: confirm whether it is an outage, avoid common mistakes, and know when to try again.https://siteupdown.com/help/what-is-a-good-response-timehttps://siteupdown.com/help/what-is-a-good-response-timeMon, 02 Nov 2026 09:00:00 +0000What response time means, which numbers are good, average or slow, and what usually makes a site respond slowly. Written for site owners and curious visitors.https://siteupdown.com/help/why-big-websites-go-downhttps://siteupdown.com/help/why-big-websites-go-downMon, 02 Nov 2026 09:00:00 +0000Even huge services have outages. The usual causes are configuration mistakes, overloaded servers, cloud and CDN failures and DNS problems. Here is how they work and why they spread.https://siteupdown.com/help/is-it-down-or-just-mehttps://siteupdown.com/help/is-it-down-or-just-meMon, 02 Nov 2026 09:00:00 +0000A simple four-step method to work out whether a site is down for everyone or only for you, using a checker, another network, another device and the site’s own status page.https://siteupdown.com/help/sites-that-block-automated-checkshttps://siteupdown.com/help/sites-that-block-automated-checksMon, 02 Nov 2026 09:00:00 +0000Many big websites refuse requests from monitoring tools. Here is why, how it shows up as a 403, 429 or timeout, and how siteupdown.com avoids calling those sites down.https://siteupdown.com/help/clear-browser-cache-and-cookieshttps://siteupdown.com/help/clear-browser-cache-and-cookiesMon, 02 Nov 2026 09:00:00 +0000Clearing the cache and cookies for a single site can fix pages that look broken, keep redirecting or refuse to log in. Steps for Chrome, Edge, Firefox and Safari.https://siteupdown.com/help/works-on-mobile-data-not-wifihttps://siteupdown.com/help/works-on-mobile-data-not-wifiMon, 02 Nov 2026 09:00:00 +0000When a site loads on your phone’s data but not on your home or office Wi-Fi, the problem is almost always your network. Here are the usual causes and fixes.https://siteupdown.com/help/dns-probe-finished-nxdomainhttps://siteupdown.com/help/dns-probe-finished-nxdomainMon, 02 Nov 2026 09:00:00 +0000What the DNS errors in Chrome, Edge, Firefox and Safari mean, and a step-by-step way to fix them on your device, your router or the website itself.https://siteupdown.com/help/error-429-too-many-requestshttps://siteupdown.com/help/error-429-too-many-requestsMon, 02 Nov 2026 09:00:00 +0000A 429 error means you, or the network you share, sent too many requests too quickly. Learn why it happens and how long to wait.https://siteupdown.com/help/error-403-forbiddenhttps://siteupdown.com/help/error-403-forbiddenMon, 02 Nov 2026 09:00:00 +0000A 403 means the website understood your request but refused it. Here are the common causes, from blocked networks and VPNs to permissions, and what you can try.https://siteupdown.com/help/down-for-some-people-not-othershttps://siteupdown.com/help/down-for-some-people-not-othersMon, 02 Nov 2026 09:00:00 +0000A site that loads for your friend but not for you: the real reasons, from DNS and CDN problems to regional outages, ISP faults, firewalls and blocked countries.https://siteupdown.com/help/how-our-checks-workhttps://siteupdown.com/help/how-our-checks-workMon, 02 Nov 2026 09:00:00 +0000How our website status checker works: the server check, the fifteen regional probes, and what Up, Down, Timeout and Inconclusive each mean.https://siteupdown.com/help/speed-up-your-websitehttps://siteupdown.com/help/speed-up-your-websiteMon, 02 Nov 2026 09:00:00 +0000Practical ways to make a website load faster: server response time, caching, compression, image size and fewer requests, and how to measure each one.https://siteupdown.com/help/domain-name-expiryhttps://siteupdown.com/help/domain-name-expiryMon, 02 Nov 2026 09:00:00 +0000What happens to a website and its email when a domain registration expires: the grace period, the redemption period, and how to avoid losing your domain.https://siteupdown.com/help/uptime-percentages-explainedhttps://siteupdown.com/help/uptime-percentages-explainedMon, 02 Nov 2026 09:00:00 +0000What 99%, 99.9% and 99.99% uptime mean in real downtime per month and per year, and how to read uptime numbers on a status page or a hosting plan.https://siteupdown.com/help/dns-propagationhttps://siteupdown.com/help/dns-propagationMon, 02 Nov 2026 09:00:00 +0000DNS propagation explained: why a website move or DNS change can take hours to show everywhere, what TTL is, and how to check where your change has reached.https://siteupdown.com/help/ssl-certificate-errorshttps://siteupdown.com/help/ssl-certificate-errorsMon, 02 Nov 2026 09:00:00 +0000Why browsers warn that a connection is not private, what common SSL certificate errors mean, and how a site owner can fix an expired or mismatched certificate.https://siteupdown.com/help/flush-dns-cachehttps://siteupdown.com/help/flush-dns-cacheMon, 02 Nov 2026 09:00:00 +0000Clearing your DNS cache fixes sites that will not load after a move or an outage. Step-by-step commands for Windows, macOS, Linux, plus browsers.https://siteupdown.com/help/err-connection-timed-outhttps://siteupdown.com/help/err-connection-timed-outMon, 02 Nov 2026 09:00:00 +0000ERR_CONNECTION_TIMED_OUT means your browser waited and the site never answered. Learn the common causes and the fixes to try, in order.https://siteupdown.com/help/website-not-loading-checklisthttps://siteupdown.com/help/website-not-loading-checklistMon, 02 Nov 2026 09:00:00 +0000A website will not load: is it down for everyone or just you? Work through this checklist to find out and fix the problem on your side.https://siteupdown.com/help/server-errors-500-502-503-504https://siteupdown.com/help/server-errors-500-502-503-504Mon, 02 Nov 2026 09:00:00 +0000Server errors in the 5xx family mean the site itself is struggling. Learn the difference between 500, 502, 503 and 504 and what to try as a visitor or an owner.https://siteupdown.com/help/error-404-not-foundhttps://siteupdown.com/help/error-404-not-foundMon, 02 Nov 2026 09:00:00 +0000A 404 means the server is working but the page is not there. Learn the common causes, what visitors can try, and how site owners should handle missing pages.https://siteupdown.com/help/http-status-codes-explainedhttps://siteupdown.com/help/http-status-codes-explainedMon, 02 Nov 2026 09:00:00 +0000A plain-English guide to HTTP status codes: the 1xx, 2xx, 3xx, 4xx and 5xx families, every common code from 100 to 511, and Cloudflare 52x errors.