On September 7, Microsoft experienced an issue that affected connections and services leveraging its Azure Front Door (AFD) platform. First observed around 12:20 p.m. EDT, the major portion of the outage, lasting around 50 minutes, and appeared to affect users' ability to connect and access Microsoft cloud services that use AFD. Network connectivity to AFD edge locations did not appear to experience any significant issues throughout the outage. Microsoft's preliminary analysis reported that the disruption appeared to be the result of an unusual spike in traffic, causing multiple environments managing the traffic load-balancing to go offline. Microsoft remediated the residual impact and announced the outage fully cleared at 3:55 p.m. EDT. Click here for an interactive view.
Updated Sept. 5
Global outages across all three categories last week decreased from 363 to 327, down 10% compared to the week prior. In the US, outages decreased from 91 to 87, down 4%.
Globally, ISP outages increased from 250 to 260, up 4%, and in the US from 57 to 64, up 12%.
Globally, cloud-provider network outages dropped from 11 to four, and from six to two in the US.
Globally, collaboration-app network outages decreased from 10 to eight and from seven to five in the US.
There were two notable outages:
On Sept. 3, Cogent Communications experienced a series of outages over a period of 50 minutes that impacted multiple downstream providers in countries including the US, Spain, Portugal, the UK, Israel, India, Luxembourg, Germany, Singapore, South Africa, Austria, France, Argentina, Denmark, and Australia. The outage, lasting a total of 43 minutes, was first observed around 6:25 p.m. EDT, initially centered on Cogent nodes in New York, New York; Washington, DC; Los Angeles and San Francisco, California; and Bilbao, Spain. After this initial nine-minute outage the Cogent environment was stable for five minutes before experiencing a 34-minute outage involving Cogent nodes located in London, England; Frankfurt and Munich, Germany; and Paris and Marseille, France. After 10 minutes, all the nodes, with the exception of those in Paris, appeared to clear. The outage was cleared around 7:15 p.m. EDT. Click here for an interactive view.
On September 1, AT&T experienced an outage that impacted customers and partners across the US. The seven-minute outage was first observed around 4:55 a.m. EDT, appearing to center on AT&T nodes located in Phoenix, Arizona. Five minutes later some of the Phoenix nodes appeared to recover. The outage was cleared at around 5:05 AM EDT. Click here for an interactive view.
Updated Aug. 29
Globally, outages across all three categories increased from 299 to 363 last week, up 21% from the prior week. In the US, they increased from 82 to 91, up 11%.
Globally, ISP outages increased from 204 to 250, up 23%, and rose from 53 to 57 in the US, an 8% increase.
Globally, cloud-provider network outages dropped from 21 to 11, and increased from five to six in the US.
Globally, collaboration-app network outages decreased from 14 to 10, and from eight to seven in the US.
Two notable outages:
On August 24, Comcast Communications experienced an outage affecting downstream partners and customers across the US. The 15-minute outage consisted of two occurrences over a two-hour period. The first occurrence was observed around 7:35 a.m. EDT and appeared to center on Comcast nodes in Houston, Texas. An hour and 50 minutes after appearing to clear, the Houston nodes again appeared to exhibit outage conditions. The outage was cleared around 9:35 a.m. EDT. Click here for an interactive view.
On August 27, Verizon Business experienced an outage affecting customers and partners across the US. The outage was first observed around 8:00 a.m. EDT and appeared centered on Verizon Business nodes in San Jose, California. The 17-minute outage was divided into three occurrences spanning an hour and five minutes and was cleared around 9:05 a.m. EDT. Click here for an interactive view.
Updated Aug. 22
Global outages across all three categories last week increased from 256 to 299, a 17% increase compared to the week prior. In the US, outages decreased from 93 to 82, down 12%.
Globally ISP outages increased from 190 to 204, up 7%, and in the US they dropped from 71 to 53, down 25%.
Globally, cloud provider network outages jumped from nine to 21, while in the US they remained the same at five.
Globally, collaboration app network outages jumped from three to 14, and from three to eight in the US.
A notable outage:
On August 17, Level 3 Communications experienced an outage that impacted multiple downstream partners and customers in countries including the US, Germany, Japan, Taiwan, the Czech Republic, and Switzerland. The outage was first observed around 11:45 p.m. EDT and appeared to be centered on Level 3 nodes in Philadelphia, Pennsylvania. The outage lasted 13 minutes and was cleared around 12:00 a.m. EDT. Click here for an interactive view.
Updated Aug. 15
Global outages across all three categories last week decreased from 260 to 256, down 2% compared to the week prior. In the US, outages decreased from 103 to 93, down 10%.
Globally, the number of ISP outages rose from 173 to 190, up 10%, while in the US they remained steady at 71.
Globally, cloud-provider network outages increased from three to nine, and in the US increased from two to five.
Globally, collaboration-app network outages dropped from 10 to three and in the US from six to three.
Two notable outages.
On August 8, Google experienced an outage that affected the availability of Search, Maps, and associated services that leverage them. First observed around 9:15 p.m. EDT, users were unable to access the service, although the application remained reachable from a network perspective. Errors seen during the incident were indicative of a back-end application issue. The disruption lasted 41 minutes over a 55-minute period. A Google spokesperson attributed the outage to a software-update issue. The outage was cleared around 10:10 p.m. EDT. Click here for an interactive view.
On August 11, Switch Communications experienced an outage affecting customers and downstream partners across countries including the US, Ireland, Canada, Spain, Greece, the Philippines, the Netherlands, Germany, Mexico, Italy, the UK, and South Africa. First observed around 5:50 a.m. EDT, the outage appeared to center on nodes in Las Vegas, Nevada. The outage lasted a total of 62 minutes over a 105-minute period. The outage was cleared around 7:35 a.m. EDT. Click here for an interactive view.
Updated Aug. 1
Global outages across all three categories last week decreased from 276 to 260, down 6% from the week prior. In the US they increased from 98 to 103, up 5%.
Globally, the ISP outages decreased from 182 to 173, down 5%, while in the US they increased from 62 to 71, up 15%.
Globally, cloud-provider network outages dropped from 13 to three and from 11 to two in the US.
Globally, collaboration-app network outages increased from nine to 10 and from two to six in the US.
There were two notable outages.
On August 4, Cogent Communications experienced an outage affecting downstream providers and Cogent customers in countries including the US, Australia, China, Singapore, Turkey, the UK, Canada, Argentina, the Netherlands, Denmark, France, Brazil, Germany, Spain, Republic of Korea, India, and Hong Kong. The 29-minute outage was first observed around 3:35 a.m. EDT centered on Cogent nodes in San Francisco, San Jose, and Sacramento, California. Five minutes later, Kansas City, Missouri, nodes also exhibited outages. During the last 15 minutes of the outage nodes gradually cleared until just those in San Francisco and San Jose showed outage conditions. The outage was cleared around 4:05 a.m. EDT. Click here, for an interactive view.
On August 4, Level 3 Communications experienced an outage affecting downstream partners and customers across countries including the US, Switzerland, and Germany. The 14-minute outage was first observed around 10:20 a.m. EDT and appeared centered on Level 3 nodes in Philadelphia, Pennsylvania. The outage was cleared around 10:35 a.m. EDT. Click here, for an interactive view.
Updated July 24
Global outages across all three categories last week increased 5% from 272 to 285 compared to the week prior. In the US, total outages increased from 88 to 122 – an increase of 39%.
Global ISP network outages decreased from 210 to 203. In the US they increased 39% from 64 to 89.
Global cloud-provider network outages decreased from 9 to 8, and in the US they climbed from three to five.
Global collaboration-app network outages decreased from 10 to 7, while in the US, they fell from eight to three, a drop of 63% compared to the week prior.
Two notable outages:
On July 20, Hurricane Electric, a network transit provider headquartered in Fremont, CA, experienced an outage that impacted customers and downstream partners across multiple regions, including the U.S., Canada, United Arab Emirates (UAE), Colombia, Germany, South Africa, Brazil, Malaysia, Japan, and the U.K. The outage, first observed at around 2:10 PM EDT, lasting a total of 13 minutes, appeared to center on Hurricane Electric nodes located in San Jose, CA. Around five minutes into the outage, the number of nodes exhibiting outage conditions located in San Jose, CA, appeared to increase. This increase in the exhibiting outage conditions appeared to coincide with the increase in the numbers of partners and regions impacted. The outage was cleared at around 2:25 PM EDT.
On July 20, Microsoft experienced an issue that affected access to Microsoft Teams globally. First observed around 9:15 PM EDT, the outage, lasting around 3 hours, appeared to impact users' ability to access the service. However, network connectivity to the service did not appear to experience any significant issues throughout the outage. Around 11:00 PM EDT Microsoft announced that they had determined that a recent deployment had resulted in a connectivity issue to an internal storage system and began rerouting traffic to an alternate region in an effort to restore functionality to the service. Microsoft Teams availability appeared to be recovered for most global users around 12:15 AM EDT.
Updated July 17
Global outages across all three categories last week decreased from 281 to 272 compared to the week prior, and in the US decreased from 120 to 88, down 27%.
Global ISP network outages decreased from 217 to 210, and in the US they dropped 34% from 97 to 64.
Global cloud-provider network outages decreased from 19 to 9 – a drop of 53% – and in the US they dropped from five to three.
Global collaboration-app network outages doubled from five to 10, while in the US, they jumped from three to eight, a spike of 167% compared to the week prior.
Two notable outages:
On July 14, Arelion (formerly known as Telia Carrier), a global Tier 1 ISP headquartered in Stockholm, Sweden, experienced an outage that impacted customers and downstream partners across multiple countries including, the U.S., the Czech Republic, Hungary, Mexico, Colombia, Brazil, Chile, Peru, Singapore, Canada, France, and Germany. The disruption lasted a total of 23 minutes, divided into two occurrences over a thirty-five-minute period. First observed around 8:45 PM EDT, the first occurrence and the longest, lasting 14 minutes, appeared to center on nodes located in Atlanta, GA. Ten minutes after appearing to recover, the nodes located in Atlanta, GA once again began exhibiting outage conditions. The outage was cleared around 9:20 PM EDT.
On July 14, Twitter experienced a service disruption that impacted users globally. First observed around 8:05 AM EDT, users were unable to access the service although the application remained reachable from a network perspective. Errors seen during the incident were indicative of a back-end application issue. The disruption lasted 40 minutes, with service access restored to a number of users around 8:50 AM EDT. With full resolution confirmed by Twitter around 12:37 PM.
Updated July 11
Global outages across all three categories last week decreased from 283 to 281 compared to the week prior, and in the US decreased from 148 to 120, down 19%.
Global ISP network outages increased from 208 to 217, and in the US they dropped from 109 to 97.
Global cloud-provider network outages increased from 18 to 19, and in the US they dropped from 11 to five.
Global collaboration-app network outages dropped from 12 to five, while in the US, they decreased from nine to three.
Two notable outages:
On July 7, AT&T experienced an outage that impacted AT&T customers and partners in the US, Canada, China, Austria, Spain, Bulgaria, Japan, Australia, South Africa, Ireland, India, and the Netherlands. The 4:20 a.m. ET outage lasted around 19 minutes, and appeared initially to center on AT&T nodes in San Jose, California, and Seattle, Washington. Ten minutes later nodes in Chicago, Illinois, and Ashburn, Virginia, were also affected. The outage was cleared around 4:40 a.m. ET.
On July 5, Cogent Communications experienced a series of outages over a period of two hours and 10 minutes affecting multiple downstream providers in the US, China, Ireland, Hong Kong, the Netherlands, New Zealand, Australia, Singapore, and Japan. The outage, lasting a total of 26 minutes, was first observed around 12:15 a.m. ET centered on Cogent nodes in Oakland and San Francisco, California. After three minutes, the outage cleared, and the Cogent environment was stable for 16 minutes. It then experienced a nine-minute outage affecting nodes in Boston, Massachusetts, and Oakland and Los Angeles, California. An hour and twenty-five minutes after the initial outage, a four-minute outage was observed on Los Angeles nodes in Los Angeles Oakland, and San Francisco, California. Thirty minutes after that appeared to clear, the Los Angeles nodes exhibited outage conditions again. That final outage was cleared around 2:25 a.m. ET.
Updated July 4
Global outages across all three categories last week increased from 247 to 283, up 15%. In the US, they increased from 92 to 148, up 61%.
Globally, ISP outages increased from 173 to 208, up 20%, and in the US they jumped from 63 to 109, up 73%.