IoT devices continuously communicate with vendor cloud platforms. DNS telemetry allows operators to identify device ecosystems and distinguish normal behavior from potential security threats.
Most IoT DNS traffic is related to telemetry, firmware updates and connectivity monitoring rather than malicious activity.
IoT telemetry refers to operational data collected by devices and sent to vendor cloud platforms. This communication allows vendors to monitor device health, improve reliability and deliver updates.
Typical telemetry information may include:
In most cases this communication is automatic and continuous.
IoT devices rely heavily on Internet connectivity because most device intelligence resides in vendor cloud platforms rather than on the device itself.
Common purposes include:This architecture explains why many IoT devices become partially non-functional when Internet access is blocked.
The following examples represent common IoT telemetry platforms frequently observed in ISP DNS environments.
Xiaomi IoT devices include cameras, robot vacuums, smart sensors and home automation products.
Telemetry purpose:us.galleryapi.micloud.xiaomi.netOfficial site: https://www.mi.com
Tuya provides backend infrastructure used by hundreds of white-label IoT vendors.
Telemetry purpose:a1.tuyaeu.comOfficial site: https://www.tuya.com
Samsung devices communicate with multiple cloud services.
Telemetry purpose:config.samsungcloudsolution.comOfficial site: https://www.samsung.com
us.ad.lgsmartad.comOfficial site: https://www.lg.com
device-metrics-us.amazon.comOfficial site: https://www.amazon.com/alexa
connectivitycheck.gstatic.comOfficial site: https://developers.google.com
logs.roku.comOfficial site: https://www.roku.com
dev.hik-connect.comOfficial site: https://www.hikvision.com
Many IoT devices rely on third-party notification platforms.
Examples include:mtalk.google.com api.amazonalexa.com
These domains are often misinterpreted as suspicious despite being legitimate infrastructure.
Many IoT devices periodically verify Internet connectivity.
Common purposes:connectivitycheck.gstatic.com captive.apple.com
These domains are among the most frequently observed DNS queries globally.
Understanding telemetry domains helps operators:
Without this context, normal IoT behavior may be misclassified as suspicious activity.
Operators typically differentiate:
| Category | Characteristics |
|---|---|
| Legitimate telemetry | Vendor domains, predictable patterns |
| Risky infrastructure | Cheap OEM platforms often abused |
| Malicious domains | C2 patterns, DGAs, botnet infrastructure |
This distinction is critical for accurate DNS security decisions.
Usually not. Most telemetry domains belong to device vendors and cloud platforms used for firmware updates, remote control, analytics and device synchronization.
IoT devices continuously communicate with vendor cloud services to verify connectivity, synchronize configuration, check for updates and support mobile applications.
Normally no. Blocking telemetry domains may break device functionality unless strict network isolation policies are required.
Yes. Many IoT ecosystems use vendor-specific domains which allow operators to identify device manufacturers such as Xiaomi, Tuya, Samsung or Amazon.
Smart TVs often contact content providers, advertising networks, firmware update servers and analytics platforms, which explains the diversity of DNS queries.
Telemetry domains usually belong to known vendors and show predictable behavior, while malicious domains often involve dynamic DNS providers, newly registered domains or unusual query patterns.
Yes. Protective DNS platforms can classify domains, identify device ecosystems and detect abnormal behavior without inspecting encrypted traffic.