David Belson
@dbelson.com
I stare at data about the Internet for Cloudflare.
https://radar.cloudflare.com/
https://mastodon.social/@dbelson
https://x.com/dbelson
https://internetdisruption.report/ (on hiatus)
https://radar.cloudflare.com/
https://mastodon.social/@dbelson
https://x.com/dbelson
https://internetdisruption.report/ (on hiatus)
Reposted by David Belson
Last few days for funding “Go Computer Now!”, a book about the nearly forgotten, pioneering Utah computer firm Sphere (1975–1977) that you likely *never heard about*. (I edited the book.) Help us get over the last hump at www.kickstarter.com/projects/bzo... @bzotto.bsky.social
Go Computer Now! – The Story of Sphere Computers
A book telling the extraordinary story of Sphere, a 1970s Utah personal computer maker far ahead of its time—until its sudden collapse.
www.kickstarter.com
November 10, 2025 at 5:50 PM
Last few days for funding “Go Computer Now!”, a book about the nearly forgotten, pioneering Utah computer firm Sphere (1975–1977) that you likely *never heard about*. (I edited the book.) Help us get over the last hump at www.kickstarter.com/projects/bzo... @bzotto.bsky.social
Reposted by David Belson
If you love data at scale, engineering, and you're a determined, creative problem solver, the Cloudflare Radar team is looking for an experienced Data and Analytics Engineer to join our team. job-boards.greenhouse.io/cloudflare/j...
Data and Analytics Engineer
Hybrid
job-boards.greenhouse.io
November 7, 2025 at 11:42 AM
If you love data at scale, engineering, and you're a determined, creative problem solver, the Cloudflare Radar team is looking for an experienced Data and Analytics Engineer to join our team. job-boards.greenhouse.io/cloudflare/j...
Reposted by David Belson
Cloudflare used historical data to investigate reports of potential new firewall tests in Turkmenistan. Shifts in TCP resets/timeouts across ASNs corroborate large-scale network control system changes. https://cfl.re/4nwaCV3
Fresh insights from old data: corroborating reports of Turkmenistan IP unblocking and firewall testing
In a recent example, our visibility into resets and timeouts helped corroborate reports of large-scale blocking and traffic tampering by Russia.
cfl.re
November 3, 2025 at 2:05 PM
Cloudflare used historical data to investigate reports of potential new firewall tests in Turkmenistan. Shifts in TCP resets/timeouts across ASNs corroborate large-scale network control system changes. https://cfl.re/4nwaCV3
Reposted by David Belson
IPv4 scarcity drives widespread use of CGNAT, a practice in ISPs that places many users behind one IP address, along with their collected Internet activity. We introduce the method we’ve developed to detect large-scale IP sharing globally and mitigate the issues that result.
A deep dive on our approach to detecting large-scale IP sharing globally. https://cfl.re/4oM315W
One IP address, many users: Detecting CGNAT to reduce collateral effects
IPv4 scarcity drives widespread use of Carrier-Grade Network Address Translation, a practice in ISPs and mobile networks that places many users behind each IP address, along with their collected activ...
blog.cloudflare.com
October 29, 2025 at 1:28 PM
IPv4 scarcity drives widespread use of CGNAT, a practice in ISPs that places many users behind one IP address, along with their collected Internet activity. We introduce the method we’ve developed to detect large-scale IP sharing globally and mitigate the issues that result.
Reposted by David Belson
Go Computer Now! – The Story of Sphere Computers. “If things had gone a little differently for them, we might be remembering Sphere the way people have fond memories of the Commodore 64 and Apple II.” Wow, I’ve never heard of Sphere. [kickstarter.com]
Go Computer Now! – The Story of Sphere Computers
A book telling the extraordinary story of Sphere, a 1970s Utah personal computer maker far ahead of its time—until its sudden collapse.
www.kickstarter.com
October 17, 2025 at 6:38 AM
Go Computer Now! – The Story of Sphere Computers. “If things had gone a little differently for them, we might be remembering Sphere the way people have fond memories of the Commodore 64 and Apple II.” Wow, I’ve never heard of Sphere. [kickstarter.com]
Backed!
The GO COMPUTER NOW! campaign has launched! Help @bzotto.bsky.social make his book about the early personal computer company you never heard of, Sphere, become a reality. I edited the book and it is a *fascinating* story of what might have been. www.kickstarter.com/projects/bzo...
October 17, 2025 at 12:04 AM
Backed!
Proud of the @radar.cloudflare.com team for the work done to add three great new data sets to Radar -- we're constantly expanding visibility into what's happening on the #Internet!
🧵
🧵
Three new Radar features launched today for @cloudflare.social #BirthdayWeek!
First: regional traffic data is now available. You can now get a more localized perspective on the impact of events and disruptions on Internet traffic. Learn more at blog.cloudflare.com/new-regional...
First: regional traffic data is now available. You can now get a more localized perspective on the impact of events and disruptions on Internet traffic. Learn more at blog.cloudflare.com/new-regional...
September 26, 2025 at 1:41 PM
Proud of the @radar.cloudflare.com team for the work done to add three great new data sets to Radar -- we're constantly expanding visibility into what's happening on the #Internet!
🧵
🧵
Hopefully it won’t suck.
BREAKING NEWS: The Muppet Show is returning! Set for 2026 on Disney+, in time for The Muppet Show's 50th anniversary.
www.toughpigs.com/muppet-show-...
www.toughpigs.com/muppet-show-...
BREAKING: The Muppet Show Returns! - ToughPigs
A new Muppet Show set in the Muppet Theatre is coming to Disney+ in 2026!
www.toughpigs.com
September 17, 2025 at 11:01 PM
Hopefully it won’t suck.
I didn't realize my Macbook Air had a dialup modem... 🤣
September 15, 2025 at 6:40 PM
I didn't realize my Macbook Air had a dialup modem... 🤣
Reposted by David Belson
Multiple reports of a brief #Starlink outage earlier this morning corroborated by a significant drop in HTTP requests between 04:00-05:00 UTC.
Large burst of #BGP announcements seen at that time as well. Announced IP address space also saw some shifts.
radar.cloudflare.com/routing/as14...
Large burst of #BGP announcements seen at that time as well. Announced IP address space also saw some shifts.
radar.cloudflare.com/routing/as14...
September 15, 2025 at 12:49 PM
Multiple reports of a brief #Starlink outage earlier this morning corroborated by a significant drop in HTTP requests between 04:00-05:00 UTC.
Large burst of #BGP announcements seen at that time as well. Announced IP address space also saw some shifts.
radar.cloudflare.com/routing/as14...
Large burst of #BGP announcements seen at that time as well. Announced IP address space also saw some shifts.
radar.cloudflare.com/routing/as14...
Reposted by David Belson
For Apple devices, it's already started to grow over the last several months as beta and RC versions of iOS and MacOS 26 became available.
September 11, 2025 at 11:53 AM
For Apple devices, it's already started to grow over the last several months as beta and RC versions of iOS and MacOS 26 became available.
Reposted by David Belson
Keep an eye on radar.cloudflare.com/adoption-and... next week as Apple releases their latest OS upgrades - we expect to see Post-Quantum adoption grow!
September 11, 2025 at 11:53 AM
Keep an eye on radar.cloudflare.com/adoption-and... next week as Apple releases their latest OS upgrades - we expect to see Post-Quantum adoption grow!
Reposted by David Belson
Who here do I know that hosts their own webpages or blogs? A postdoc colleague and I would like to ask a few fast questions about your traffic patterns over the last 5 years.
(please reshare for reach thank you!)
(please reshare for reach thank you!)
September 4, 2025 at 4:47 PM
Who here do I know that hosts their own webpages or blogs? A postdoc colleague and I would like to ask a few fast questions about your traffic patterns over the last 5 years.
(please reshare for reach thank you!)
(please reshare for reach thank you!)
The Radar team's latest work on bringing increased visibility to traffic from AI crawlers.
We are extending AI-related insights on Cloudflare Radar with new industry-focused data and a breakdown of bot traffic by purpose, such as training or user action. https://cfl.re/4lNIVX2
A deeper look at AI crawlers: breaking down traffic by purpose and industry
We are extending AI-related insights on Cloudflare Radar with new industry-focused data and a breakdown of bot traffic by purpose, such as training or user action. These new views help website owners ...
cfl.re
August 28, 2025 at 1:11 PM
The Radar team's latest work on bringing increased visibility to traffic from AI crawlers.
Reposted by David Belson
On August 20, Let' s Encrypt switched certificate issuance to use intermediate certificates R12 and R13, retiring the use of R10 and R11. The shift is clearly visible in our Certificate Transparency graphs, starting ~18:00 UTC.
community.letsencrypt.org/t/switching-...
community.letsencrypt.org/t/switching-...
August 27, 2025 at 12:31 PM
On August 20, Let' s Encrypt switched certificate issuance to use intermediate certificates R12 and R13, retiring the use of R10 and R11. The shift is clearly visible in our Certificate Transparency graphs, starting ~18:00 UTC.
community.letsencrypt.org/t/switching-...
community.letsencrypt.org/t/switching-...
Reposted by David Belson
Pakistani backbone provider PTCL is experiencing a near-complete outage, with traffic dropping over 90% around 16:10 UTC.
Interestingly, traffic to Cloudflare's 1.1.1.1 DNS Resolver spiked concurrently with the observed outage.
radar.cloudflare.com/traffic/as17...
Interestingly, traffic to Cloudflare's 1.1.1.1 DNS Resolver spiked concurrently with the observed outage.
radar.cloudflare.com/traffic/as17...
August 19, 2025 at 5:34 PM
Pakistani backbone provider PTCL is experiencing a near-complete outage, with traffic dropping over 90% around 16:10 UTC.
Interestingly, traffic to Cloudflare's 1.1.1.1 DNS Resolver spiked concurrently with the observed outage.
radar.cloudflare.com/traffic/as17...
Interestingly, traffic to Cloudflare's 1.1.1.1 DNS Resolver spiked concurrently with the observed outage.
radar.cloudflare.com/traffic/as17...
Reposted by David Belson
A nominal Starlink disruption lasted less than 15 minutes, between 17:40-17:55 UTC. Biggest impacts to traffic were observed in the United States, Canada, Mexico, Germany, the United Kingdom, and Nigeria. No word yet on what caused the disruption.
August 18, 2025 at 6:54 PM
A nominal Starlink disruption lasted less than 15 minutes, between 17:40-17:55 UTC. Biggest impacts to traffic were observed in the United States, Canada, Mexico, Germany, the United Kingdom, and Nigeria. No word yet on what caused the disruption.
Reposted by David Belson
🎃 Save the date! Spooktacular IMC Hackathon
📅 Oct 31, 2025 · ⏰ 1–8 PM CT
📍 Discovery Building, Madison, WI
🤝 Partners: Internet Society, IIJ, M-Lab, IODA, Cloudflare, OONI & Sorbonne
🛠️ Open to IMC attendees/hosts. Agenda soon.
#IMC2025 #Hackathon #InternetMeasurement
📅 Oct 31, 2025 · ⏰ 1–8 PM CT
📍 Discovery Building, Madison, WI
🤝 Partners: Internet Society, IIJ, M-Lab, IODA, Cloudflare, OONI & Sorbonne
🛠️ Open to IMC attendees/hosts. Agenda soon.
#IMC2025 #Hackathon #InternetMeasurement
August 18, 2025 at 4:24 PM
🎃 Save the date! Spooktacular IMC Hackathon
📅 Oct 31, 2025 · ⏰ 1–8 PM CT
📍 Discovery Building, Madison, WI
🤝 Partners: Internet Society, IIJ, M-Lab, IODA, Cloudflare, OONI & Sorbonne
🛠️ Open to IMC attendees/hosts. Agenda soon.
#IMC2025 #Hackathon #InternetMeasurement
📅 Oct 31, 2025 · ⏰ 1–8 PM CT
📍 Discovery Building, Madison, WI
🤝 Partners: Internet Society, IIJ, M-Lab, IODA, Cloudflare, OONI & Sorbonne
🛠️ Open to IMC attendees/hosts. Agenda soon.
#IMC2025 #Hackathon #InternetMeasurement
Reposted by David Belson
Digital certificates underpin Web security and certificate transparency brings visibility into the millions of certificates issued daily.
Our new Certificate Transparency page shares a wealth of data on certificates, CAs, CT logs, and more.
radar.cloudflare.com/certificate-...
#MerkleTown
Our new Certificate Transparency page shares a wealth of data on certificates, CAs, CT logs, and more.
radar.cloudflare.com/certificate-...
#MerkleTown
August 6, 2025 at 5:44 PM
Digital certificates underpin Web security and certificate transparency brings visibility into the millions of certificates issued daily.
Our new Certificate Transparency page shares a wealth of data on certificates, CAs, CT logs, and more.
radar.cloudflare.com/certificate-...
#MerkleTown
Our new Certificate Transparency page shares a wealth of data on certificates, CAs, CT logs, and more.
radar.cloudflare.com/certificate-...
#MerkleTown
Reposted by David Belson
AI bots generally crawl for training, search indexing, or in response to a user action. @radar.cloudflare.com now provides a "crawl purpose" perspective on AI bot traffic trends -- see more at radar.cloudflare.com/ai-insights#...
August 5, 2025 at 1:21 PM
AI bots generally crawl for training, search indexing, or in response to a user action. @radar.cloudflare.com now provides a "crawl purpose" perspective on AI bot traffic trends -- see more at radar.cloudflare.com/ai-insights#...
Reposted by David Belson
The latest series of partial #Internet shutdowns in #Syria, intended to prevent cheating on high school exams, finished today. These shutdowns targeted mobile providers, limiting the impact.
radar.cloudflare.com/traffic/sy?d...
radar.cloudflare.com/traffic/sy?d...
August 3, 2025 at 1:41 PM
The latest series of partial #Internet shutdowns in #Syria, intended to prevent cheating on high school exams, finished today. These shutdowns targeted mobile providers, limiting the impact.
radar.cloudflare.com/traffic/sy?d...
radar.cloudflare.com/traffic/sy?d...
Reposted by David Belson
A M8.8 #earthquake at 23:40 UTC off the Kamchatka Peninsula in #Russia resulted in a ~50% drop in Internet traffic from the region.
#Tsunami warnings have been issued for Japan, Alaska, Hawaii, Guam, and other Russian regions.
www.reuters.com/business/env...
x.com/USGS_Quakes/...
#Tsunami warnings have been issued for Japan, Alaska, Hawaii, Guam, and other Russian regions.
www.reuters.com/business/env...
x.com/USGS_Quakes/...
July 30, 2025 at 2:00 AM
A M8.8 #earthquake at 23:40 UTC off the Kamchatka Peninsula in #Russia resulted in a ~50% drop in Internet traffic from the region.
#Tsunami warnings have been issued for Japan, Alaska, Hawaii, Guam, and other Russian regions.
www.reuters.com/business/env...
x.com/USGS_Quakes/...
#Tsunami warnings have been issued for Japan, Alaska, Hawaii, Guam, and other Russian regions.
www.reuters.com/business/env...
x.com/USGS_Quakes/...
My latest post for the @cloudflare.social blog, looking at #Internet disruptions during the second quarter, as seen through @radar.cloudflare.com
Internet shutdowns disrupted connectivity in multiple countries in Q2 2025, as did power outages, cable damage, technical problems, and a cyberattack. See the impacts though a Cloudflare Radar lens at blog.cloudflare.com/q2-2025-inte...
Shutdown season- the Q2 2025 Internet disruption summary
In Q2 2025, we observed Internet disruptions around the world resulting from government-directed shutdowns, power outages, cable damage, a cyberattack, and technical problems, as well as several with ...
blog.cloudflare.com
July 22, 2025 at 1:46 PM
My latest post for the @cloudflare.social blog, looking at #Internet disruptions during the second quarter, as seen through @radar.cloudflare.com
Reposted by David Belson
Amidst violent clashes between Druze and Bedouins, there are reports of a government ordered #shutdown of the #Internet in As Suwayda' #Syria. IODA shows a loss of connectivity since July 14. #keepiton
Follow connectivity in As Suwayda' in near realtime:
ioda.inetintel.cc.gatech.edu/asn/29256-39...
Follow connectivity in As Suwayda' in near realtime:
ioda.inetintel.cc.gatech.edu/asn/29256-39...
July 21, 2025 at 12:16 PM
Amidst violent clashes between Druze and Bedouins, there are reports of a government ordered #shutdown of the #Internet in As Suwayda' #Syria. IODA shows a loss of connectivity since July 14. #keepiton
Follow connectivity in As Suwayda' in near realtime:
ioda.inetintel.cc.gatech.edu/asn/29256-39...
Follow connectivity in As Suwayda' in near realtime:
ioda.inetintel.cc.gatech.edu/asn/29256-39...
Reposted by David Belson
The latest round of #Internet shutdowns in #Syria to prevent cheating on exams concluded this morning. In contrast to previous years, only cellular connectivity was shut off this year. The next round, for high school exams, will occur July 13 - August 3.
radar.cloudflare.com/traffic/sy?d...
radar.cloudflare.com/traffic/sy?d...
July 9, 2025 at 12:44 PM
The latest round of #Internet shutdowns in #Syria to prevent cheating on exams concluded this morning. In contrast to previous years, only cellular connectivity was shut off this year. The next round, for high school exams, will occur July 13 - August 3.
radar.cloudflare.com/traffic/sy?d...
radar.cloudflare.com/traffic/sy?d...