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David Belson

@dbelson.com
571 followers 351 following 191 posts

I stared at data about the Internet for Cloudflare. radar.cloudflare.com mastodon.social/@dbelson x.com/dbelson internetdisruption.report (on hiatus)

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David Belson @dbelson.com · 18/09/2026
An island-wide power outage in #Cuba has impacted #Internet connectivity across the country. Starting around 17:45 UTC, @radar.cloudflare.com data shows traffic dropping by >50% compared to the prior week, and @ioda.live shows a 10% drop in successful active probing.
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Jim Cowie @jimcowie.bsky.social · 04/09/2026
New exhibit has dropped in the Internet History Initiative reading room, thanks to some excellent new indexing of 19th century Boston newspapers (h/t: Boston Public Library via Harvard Library's @institutional.org ) internethistoryinitiative.org/blog/2026/09/04/before-the-internet/
internethistoryinitiative.org
Before the Internet
A new exhibit in the Reading Room — a century of telegraph and telephone monopoly politics, 1834–1930, in Boston's own newspapers
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Glenn Fleishman @glennf.com · 17/08/2026
I’m getting down to the wire on this with three days to go. If you’d like a hardcover book full of enjoyable weirdness and rabbit holes—a great gift for friends and family interested in type, printing, and language—pledge now, as the campaign is not yet at 100%! Thank you.
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Access Now @accessnow.org · 11/08/2026
For 10 years, the #KeepItOn campaign has united civil society to push back against internet shutdowns and defend human rights. Today, the movement is stronger than ever. Celebrate with us and join the #KeepItOn movement: www.accessnow.org/keepiton-10-...
accessnow.org
https://www.accessnow.org/keepiton-10-years-fighting-internet-shutdowns/
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David Belson @dbelson.com · 10/08/2026
The #earthquake in #Colombia had a nominal impact on #Internet connectivity, per @radar.cloudflare.com data. Traffic dropped 35% compared to the prior week. Traffic at an ASN level appeared to recover quickly. Some loss of announced IP space, suggesting infrastructure damage as well.
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David Belson @dbelson.com · 29/07/2026
Learn more about the impact of this widespread power outage to #Internet connectivity in #Kenya as viewed through @radar.cloudflare.com and @ioda.live metrics: blog.isadati.work/internet-imp...
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David Belson @dbelson.com · 28/07/2026
The impact of an issue impacting @t-mobile.bsky.social subscribers is visible in @radar.cloudflare.com traffic data. Starting around 20:00 UTC, traffic on AS21928 fell by as much as 10% as compared to the prior week. radar.cloudflare.com/traffic/as21...
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David Belson @dbelson.com · 24/07/2026
A power outage in #Georgia has impacted Internet connectivity across the country. @radar.cloudflare.com shows traffic dropping ~75% below expected levels around 20:00 on July 23, and @ioda.live shows losses across multiple metrics.
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Doug Madory @eldomador.bsky.social · 23/07/2026
Latest chart for traffic to Iran since December 2025. After two shutdowns, traffic levels have not returned to pre-Jan-8 levels, and is unlikely to do so in the foreseeable future. #DigitalBlackOutIran‌
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David Belson @dbelson.com · 23/07/2026
Connectivity problems with the @azure.microsoft.com westus region are visible in the @radar.cloudflare.com Cloud Observatory as an increase in connection failures, starting around 14:45 UTC. radar.cloudflare.com/cloud-observ...
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David Belson @dbelson.com · 21/07/2026
According to @radar.cloudflare.com, .juniper has a fairly low DNS magnitude. Also interesting that nearly half of the queries to 1.1.1.1 for .juniper hostnames come from Germany. radar.cloudflare.com/tlds/juniper...
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David Belson @dbelson.com · 14/07/2026
The electric grid in #Cuba has collapsed for the 3rd time this month, causing a widespread power outage. @radar.cloudflare.com shows traffic falling around 15:00 UTC (15:00 local), and @ioda.live shows active probing failures around that time as well. en.cibercuba.com/noticias/202...
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David Belson @dbelson.com · 06/07/2026
The impact of the latest island-wide power outage in Cuba is visible in @radar.cloudflare.com traffic data, as well as @ioda.live active probing data, with drops visible around 16:00 UTC. radar.cloudflare.com/traffic/cu?d... ioda.inetintel.cc.gatech.edu/country/CU
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David Belson @dbelson.com · 30/06/2026
Paging @emophilips.bsky.social
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Ryan Lawler @ryanlawler.bsky.social · 25/06/2026
Truly saddened by this news. Working with Om was a joy. He was one of the smartest, kindest, most thoughtful people in the tech ecosystem. He will be missed immensely by all who were lucky enough to know him. om.co/2026/06/24/1...
om.co
Om Malik, 1966-2026
Om Malik passed away on June 24, 2026, at Stanford Hospital after a long health journey with his heart. He was surrounded by family and friends. We invite you to share your remembrances of Om in th…
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David Belson @dbelson.com · 22/06/2026
Data from @radar.cloudflare.com shows a [complete loss of announced IPv4 & v6 space](radar.cloudflare.com/routing/lc?d... ) from Flow St. Lucia starting at 21:00 UTC, and with it, a complete loss of traffic from the network, impacting connectivity island-wide. stlucianewsnow.net/flow-reports...
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David Belson @dbelson.com · 20/06/2026
I wonder if the second book in the series was called “Foreman Farley Causes an Internet Outage”
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David Belson @dbelson.com · 06/06/2026
A widespread power outage in #Jamaica is impacting #Internet traffic from the island. @CloudflareRadar shows traffic fell ~0200 UTC, with the largest impact to FLOW Jamaica. The provider acknowledged the issue in a Facebook post. radar.cloudflare.com/traffic/jm?d... www.facebook.com/FlowJamaica/...
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David Belson @dbelson.com · 02/06/2026
In a Facebook post, Syria's Ministry of Communications & Information Technology announced that there will be no communication cuts during the general exams this year, in contrast to #Internet shutdowns implemented in past years. www.facebook.com/SyMOCAIT/pos... www.google.com/search?q=syr...
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David Belson @dbelson.com · 28/05/2026
🧵Some additional perspectives on the (limited) restoration of #Internet connectivity in #Iran on May 26: Based on request traffic to the @cloudflare.social 1.1.1.1 resolver, the rank of the .ir ccTLD has jumped from #144 on May 25 to #96 on May 28. radar.cloudflare.com/tlds/ir?date...
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David Belson @dbelson.com · 28/05/2026
Cable damage has taken Digicel Haiti completely offline, as @radar.cloudflare.com shows that #Internet traffic and announced IP space all fell to zero just after 22:00 UTC (18:00 local). Similar problems occurred multiple times in 2025. radar.cloudflare.com/traffic/as27... x.com/jpbrun30/sta...
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Doug Madory @eldomador.bsky.social · 26/05/2026
Just to keep today's partial restoration of Iranian internet connectivity in perspective, please take a look at this overall timeline. Iran has a long way to go to get back to pre-Jan-8 levels of traffic volumes. #DigitalBlackOutIran‌
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David Belson @dbelson.com · 26/05/2026
Traffic data from @radar.cloudflare.com shows a rapid increase in traffic from #Iran starting ~11:00 UTC (14:30 local). Traffic from providers including #Irancell, #MCCI, and #TCI is up significantly. radar.cloudflare.com/traffic/ir?d...
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David Belson @dbelson.com · 20/05/2026
Exam season in #Iraq started today, and with it, widespread #Internet shutdowns. Connectivity was cut across multiple major ISPs between 0300-0430 UTC, though networks in the Kurdistan Region remained available. radar.cloudflare.com/traffic/iq?d...
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David Belson @dbelson.com · 08/05/2026
I was one of the 1100 impacted by yesterday's layoff at Cloudflare. Thankful that I had the opportunity to work on @radar.cloudflare.com over the past 4+ years, evolving it into a trusted industry resource. Would love to continue working with #Internet data in my next role...
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Cloudflare @cloudflare.social · 06/05/2026
DNSSEC failure broke the .de TLD, risking millions of German domains. See how 1.1.1.1 used "serve stale" and Negative Trust Anchors to restore resolution during the incident. Read the full technical breakdown. cfl.re/4we2Nsz
blog.cloudflare.com
When DNSSEC goes wrong: how we responded to the .de TLD outage
On May 5, 2026, DENIC published broken DNSSEC signatures for the .de TLD, making millions of domains unreachable. Here's what 1.1.1.1 saw, how serve stale cushioned the impact, and how we restored res...
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Cloudflare Radar @radar.cloudflare.com · 06/05/2026
May 5 .de DNSSEC issues as seen through 1.1.1.1 Resolver data on Radar: - Increased DS record request traffic share, from <1% to >10% - Increased SERVFAIL response share, from <2% to 50% - ~4x increase in query volume - >80% drop in certificate issuance radar.cloudflare.com/tlds/de?date...
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Access Now @accessnow.org · 06/05/2026
Gov’ts continue to shut down the internet during school exams, claiming it prevents cheating. There’s no evidence it works. But there’s clear evidence it violates rights + cuts people off from essential services. Here’s what’s on our watch list for 2026 🔽 www.accessnow.org/campaign/no-...
11 exam-related internet shutdowns across six countries in the Middle East and Africa in 2025!
No evidence they prevent cheating.
Clear evidence they harm.
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David Belson @dbelson.com · 05/05/2026
More great new updates to @radar.cloudflare.com -- check out the whole thread!
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Cloudflare Radar @radar.cloudflare.com · 04/05/2026
Country level announced IP address space graphs now include a "Show top ASes" toggle. Stacked area graphs make it easier to identify the providers behind large address space withdrawals. Example: radar.cloudflare.com/routing/ir?d...
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Cloudflare Radar @radar.cloudflare.com · 04/05/2026
🚨 More new routing insights on Radar! Track #RPKI ROA deployment history at a global/country/ASN level, going back 3+ years for valid prefixes & address space radar.cloudflare.com/routing/rpki...
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Cloudflare Radar @radar.cloudflare.com · 01/05/2026
The Cloud Observatory on Cloudflare Radar has been updated: -Platform-level connection metrics on the landing page -Provider pages show connection metrics for the top 5 fastest/slowest regions -Region pages show connection metrics as %ile distributions radar.cloudflare.com/cloud-observ...
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Cloudflare Radar @radar.cloudflare.com · 01/05/2026
Interested in owning your own Top-Level Domain (TLD)? The #ICANN New gTLD Program: 2026 Round is now open -- newgtldprogram.icann.org/en For more information about existing TLDs, or popular non-delegated TLDs, check out Radar's TLDs page at radar.cloudflare.com/tlds
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Cloudflare Radar @radar.cloudflare.com · 29/04/2026
🕶️ New on Cloudflare Radar: DARK MODE support! A theme selector in the upper right corner of the page now lets users explicitly choose light mode or dark mode, or to follow the system setting. The choice can be applied to shared and embedded graphs as well.
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Cloudflare @cloudflare.social · 28/04/2026
The first quarter of 2026 saw a surge in Internet disruptions, from nationwide shutdowns in Uganda and Iran to unprecedented drone strikes on cloud infrastructure. We explore the data behind these events using Cloudflare Radar. cfl.re/4cJz8yJ
blog.cloudflare.com
Shutdowns, power outages, and conflict: a review of Q1 2026 Internet disruptions
This post is intended as a summary overview of observed and confirmed disruptions and is not an exhaustive or complete list of issues that have occurred during the quarter.
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Alberto Dainotti @albertodainotti.bsky.social · 28/04/2026
From War to Sovereignty: The Normalization of Tiered Internet in Iran
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Cloudflare Radar @radar.cloudflare.com · 28/04/2026
On February 28, the #Internet was shut down in #Iran for the second time in 2026. Two months later, it remains largely unavailable. However, increased allowlisting of external sites, and availability of "Internet Pro" access has driven nominal increases in traffic visible in the back half of April.
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IODA (Internet Outage Detection and Analysis) @ioda.live · 27/04/2026
The IODA team and Project Ainita have documented a measurement-based perspective of the ongoing shutdown cutting Iran off from the global Internet. The Iranian regime has morphed a "stealth Internet blackout" from June 2025 into a new Internet. ioda.inetintel.cc.gatech.edu/reports/from...
ioda.inetintel.cc.gatech.edu
From War to Sovereignty: The Normalization of Tiered Internet in Iran
On February 28th, 2026, the United States and Israel launched airstrikes against Iran, and the Iranian regime once again reached for the Internet "kill switch." Similar to the January 2026 shutdown am...
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David Belson @dbelson.com · 20/04/2026
Interesting observation: Sunday-Thursday each week, between 0900-2000 UTC, Googlebot appears to ramp up its crawling of plain text files. A similar pattern is visible for JavaScript files as well, Monday-Thursday, between 1600-1200 UTC. radar.cloudflare.com/bots/directo...
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Cloudflare Radar @radar.cloudflare.com · 13/04/2026
We love seeing @radar.cloudflare.com data cited in research papers and other publications. In support of that, shareable widgets on Radar now contain a "generate citation" icon in the action bar, featuring BibTeX, APA, MLA, Chicago, and RIS styles.
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Doug Madory @eldomador.bsky.social · 06/04/2026
A recent target of airstrikes, Sharif University of Technology (AS12660) went offline at 23:12 UTC (2:42am local) today. apnews.com/video/ict-bu... @ioda.live view: ioda.inetintel.cc.gatech.edu/asn/12660-IR...
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John Kristoff @jtk.infosec.exchange.ap.brid.gy · 05/04/2026
It is a teeny increase, but in recent weeks Cloudflare Radar now shows #IPv6 crossing the 40% proportion threshold in traffic. It has been hovering at 39% for awhile. We'll just have to wait and see if that is the new floor. radar.cloudflare.com/adoption-and-u…
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Cloudflare Radar @radar.cloudflare.com · 31/03/2026
We've also extended bot traffic visibility on Radar to support sub-national filters. Radar now shows bot traffic trends and which networks generate the most bot traffic from your state/region. Examples: radar.cloudflare.com/bots/2267056 radar.cloudflare.com/bots/5549030
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Cloudflare Radar @radar.cloudflare.com · 31/03/2026
Cloudflare Radar is a rich source of BGP and routing insights and data. To recognize its importance, we've broken out "Routing" into its own section, featuring Overview, RPKI, and Anomalies pages, with more to come very soon. Explore for yourself at radar.cloudflare.com/routing
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Glenn Fleishman @glennf.com · 23/03/2026
Last 24 hours to pledge for a copy of “Flong Time, No See,” my new book, or get unique letterpress and printing artifacts! www.kickstarter.com/projects/gle... The book is about printing history through the lens of technology and often-forgotten people who did the work.
kickstarter.com
Flong Time, No See: Forgotten Stories of Printing and Labor
Collected essays and reporting on the intersection of type, printing, culture, and labor by journalist Glenn Fleishman
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Doug Madory @eldomador.bsky.social · 18/03/2026
Iran is currently enduring its longest-ever internet shutdown, which began shortly after the Feb-28 airstrikes. My latest post covers all of 2026, outages within the whitelisted traffic, and other observations from our data. #DigitalBlackOutIran‌ www.kentik.com/blog/interne...
kentik.com
Internet and Airstrikes: Tracking Iran's Extended Communication Blackout
In this post, we use Kentik’s traffic statistics to dig into the ongoing internet shutdown in Iran, which began within hours of American and Israeli airstrikes on February 28. This is the second shutd...
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Cloudflare Radar @radar.cloudflare.com · 18/03/2026
🌍 Small i18n improvement: If you are using Radar in a language other than English, we now display translated geolocations (geonames alternate names) where available. For example, see radar.cloudflare.com/pt-pt/traffi... or radar.cloudflare.com/ja-jp/traffi...
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Cloudflare Radar @radar.cloudflare.com · 17/03/2026
Speed test results are now shared between speed.cloudflare.com and radar.cloudflare.com/speedtest. Detailed results are shown on Speed, while summary and country/network comparisons are shown on Radar, and users can now easily switch between the two views.
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Cloudflare Radar @radar.cloudflare.com · 06/03/2026
The latest #Internet shutdown in #Iran has now entered its 7th day. Traffic remains well under 1% of previous levels. The distribution of remaining traffic by ASN has shifted significantly since the shutdown was implemented. radar.cloudflare.com/traffic/ir radar.cloudflare.com/explorer?dat...
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David Belson @dbelson.com · 05/03/2026
Having started my career at BBN, and being a big fan of @glennf.com's work, this discovery is 🤯
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