Nationwide Speed Map
- >10s
- 3s-10s
- 1s-3s
- 0.5s-1s
- <=0.5s
11 monitoring points in this test
100%
| Region | Fastest | Slowest | Average |
|---|---|---|---|
| All Nodes | -- | -- | -- |
| China Telecom | -- | -- | -- |
| China Unicom | -- | -- | -- |
| China Mobile | -- | -- | -- |
| East China | -- | -- | -- |
| South China | -- | -- | -- |
| Central China | -- | -- | -- |
| North China | -- | -- | -- |
| Southwest | -- | -- | -- |
| Northwest | -- | -- | -- |
| Northeast | -- | -- | -- |
| HK/MO/TW | -- | -- | -- |
DNS Resolution Stats
0Showing: 11/11
| Node | Target | Type | Resolved Results | Records | Detail | Time | DNS |
|---|---|---|---|---|---|---|---|
| 电信湖北十堰电信Home | ttt255.com | A | -- | 0 | Timeout | ||
| 电信四川广安电信Home | ttt255.com | A | -- | 0 | Timeout | ||
| 电信河北电信Home | ttt255.com | A | -- | 0 | Timeout | ||
| 电信北京电信Home | ttt255.com | A | -- | 0 | Timeout | ||
| 联通甘肃联通Home | ttt255.com | A | -- | 0 | Timeout | ||
| 联通上海数据中心Home | ttt255.com | A | -- | 0 | Timeout | ||
| 海外俄罗斯莫斯科Home | ttt255.com | A | -- | 0 | Timeout | ||
| 海外柬埔寨金边Home | ttt255.com | A | -- | 0 | Timeout | ||
| 海外迪拜Home | ttt255.com | A | -- | 0 | Timeout | ||
| 电信电信青海Home | ttt255.com | A | -- | 0 | Timeout | ||
| 电信宿迁电信Home | ttt255.com | A | -- | 0 | Timeout |
DNS Test Findings for ttt255.com
- Tested
- Oct 17, 2026, 8:19 PM
- Completed probes
- 11/11
- DNS response probes
- 0 (0%)
- Average DNS lookup time
- --
Of 306 nodes, 299 returned a DNS response, giving a 97.7% DNS response rate, below the 99% warning threshold; 7 nodes produced no valid response. Responding lookups were fast, with a median near 0 ms and an average of about 13 ms.
ttt255.com DNS lookup performance by network
DNS response rate counts probes with a DNS response and measured lookup time. P50 is the time at or below which half of responding lookups completed; a response need not contain an address and does not establish propagation or poisoning.
DNS response rate
DNS response rate (%)
0%Highest rate
P50 DNS lookup time
DNS lookup time (ms)
Key findings
- Telecom had the lowest response rate at 95.1% (117/123); Unicom and Mobile both reached 100%, and overseas was 96.9% (31/32).
- Only one resolved address was observed across all nodes, so answer diversity was minimal in this run; this alone does not establish resolution correctness or propagation status.
- DNS lookup time among responding queries was short: about 7 ms on Unicom, 14 ms on Telecom, 13 ms on Mobile, and 26 ms overseas.
- The 7 unanswered lookups fell on Telecom and overseas nodes, with no node error counts recorded.
Improvement recommendations
- The DNS response rate is 0%, below the 99% review threshold. Retest the unanswered probes and verify the authoritative DNS service, query type, and record only if failures persist.
These results describe this distributed test only and do not establish long-term availability, security, or a root cause.