>10s
3s-10s
1s-3s
0.5s-1s
<=0.5s

124 monitoring points in this test

100%

Region	Fastest	Slowest	Average
All Nodes	湖北武汉电信 0.000s	新疆乌鲁木齐电信 1.305s	0.131s
China Telecom	湖北武汉电信 0.000s	新疆乌鲁木齐电信 1.305s	0.131s
China Unicom	--	--	--
China Mobile	--	--	--
East China	安徽黄山电信 0.001s	江西南昌电信 0.435s	0.067s
South China	广东揭阳电信 0.014s	广西贵港电信 0.145s	0.096s
Central China	湖北武汉电信 0.000s	河南漯河电信 0.147s	0.081s
North China	北京电信 0.063s	山西晋中电信 0.348s	0.170s
Southwest	重庆江津电信 0.033s	西藏山南电信 0.165s	0.115s
Northwest	陕西西安电信 0.002s	新疆乌鲁木齐电信 1.305s	0.352s
Northeast	辽宁辽阳电信 0.140s	吉林辽源电信 0.691s	0.223s
HK/MO/TW	--	--	--

DNS Resolution Stats

Showing: 124/124

Node	Target	Type	Resolved Results	Records	Time	DNS
电信贵州贵阳电信Home	zh.khanacademy.org	A	199.232.161.42	1	136ms	223.5.5.5
电信湖北十堰电信Home	zh.khanacademy.org	A	199.232.161.42	1	65ms	223.5.5.5
电信四川广安电信Home	zh.khanacademy.org	A	199.232.161.42	1	78ms	223.5.5.5
电信河北电信Home	zh.khanacademy.org	A	146.75.113.42	1	133ms	223.5.5.5
电信北京电信Home	zh.khanacademy.org	A	199.232.161.42	1	129ms	223.5.5.5
电信电信青海Home	zh.khanacademy.org	A	199.232.161.42	1	1037ms	223.5.5.5
电信宿迁电信Home	zh.khanacademy.org	A	146.75.113.42	1	95ms	223.5.5.5
电信江苏苏州电信	zh.khanacademy.org	success	151.101.89.42	1	157ms	223.5.5.5
电信云南昆明电信	zh.khanacademy.org	success	146.75.113.42	1	95ms	223.5.5.5
电信西藏拉萨1电信	zh.khanacademy.org	success	146.75.45.42	1	155ms	223.5.5.5
电信福建福州电信	zh.khanacademy.org	success	199.232.161.42	1	57ms	223.5.5.5
电信重庆黔江电信	zh.khanacademy.org	success	199.232.161.42	1	80ms	223.5.5.5
电信青海西宁电信	zh.khanacademy.org	success	199.232.161.42	1	140ms	223.5.5.5
电信河北石家庄电信	zh.khanacademy.org	success	146.75.113.42	1	124ms	223.5.5.5
电信甘肃兰州电信	zh.khanacademy.org	success	146.75.113.42	1	411ms	223.5.5.5
电信山东青岛1电信	zh.khanacademy.org	success	199.232.161.42	1	58ms	223.5.5.5
电信上海徐汇电信	zh.khanacademy.org	success	146.75.113.42	1	7ms	223.5.5.5
电信辽宁辽阳电信	zh.khanacademy.org	success	146.75.113.42	1	140ms	223.5.5.5
电信海南三亚电信	zh.khanacademy.org	success	199.232.161.42	1	137ms	223.5.5.5
电信江苏宿迁电信	zh.khanacademy.org	success	146.75.113.42	1	74ms	223.5.5.5
电信重庆江津电信	zh.khanacademy.org	success	146.75.113.42	1	33ms	223.5.5.5
电信浙江宁波电信	zh.khanacademy.org	success	199.232.161.42	1	17ms	223.5.5.5
电信江西南昌电信	zh.khanacademy.org	success	199.232.161.42	1	435ms	223.5.5.5
电信内蒙古呼和浩特电信	zh.khanacademy.org	success	199.232.161.42	1	136ms	223.5.5.5
电信浙江杭州电信	zh.khanacademy.org	success	199.232.161.42	1	64ms	223.5.5.5
电信湖南郴州电信	zh.khanacademy.org	success	199.232.161.42	1	54ms	223.5.5.5
电信湖南长沙电信	zh.khanacademy.org	success	199.232.161.42	1	93ms	223.5.5.5
电信安徽池州电信	zh.khanacademy.org	success	146.75.113.42	1	14ms	223.5.5.5
电信辽宁铁岭电信	zh.khanacademy.org	success	199.232.161.42	1	146ms	223.5.5.5
电信吉林辽源电信	zh.khanacademy.org	success	199.232.161.42	1	691ms	223.5.5.5
电信广西贵港电信	zh.khanacademy.org	success	146.75.113.42	1	145ms	223.5.5.5
电信河南三门峡电信	zh.khanacademy.org	success	146.75.113.42	1	99ms	223.5.5.5
电信江苏盐城电信	zh.khanacademy.org	success	199.232.161.42	1	94ms	223.5.5.5
电信辽宁沈阳电信	zh.khanacademy.org	success	199.232.161.42	1	141ms	223.5.5.5
电信福建厦门电信	zh.khanacademy.org	success	199.232.161.42	1	59ms	223.5.5.5
电信江苏泰州电信	zh.khanacademy.org	success	199.232.161.42	1	7ms	223.5.5.5
电信湖南衡阳电信	zh.khanacademy.org	success	199.232.161.42	1	103ms	223.5.5.5
电信湖北十堰电信	zh.khanacademy.org	success	199.232.161.42	1	62ms	223.5.5.5
电信安徽滁州电信	zh.khanacademy.org	success	146.75.113.42	1	26ms	223.5.5.5
电信江苏连云港电信	zh.khanacademy.org	success	146.75.113.42	1	16ms	223.5.5.5
电信广东揭阳电信	zh.khanacademy.org	success	146.75.113.42	1	14ms	223.5.5.5
电信河南商丘电信	zh.khanacademy.org	success	146.75.113.42	1	107ms	223.5.5.5
电信黑龙江鸡西电信	zh.khanacademy.org	success	146.75.113.42	1	157ms	223.5.5.5
电信山东枣庄电信	zh.khanacademy.org	success	199.232.161.42	1	24ms	223.5.5.5
电信内蒙古巴彦淖尔电信	zh.khanacademy.org	success	146.75.45.42	1	168ms	223.5.5.5
电信江苏徐州电信	zh.khanacademy.org	success	146.75.113.42	1	144ms	223.5.5.5
电信广东佛山电信	zh.khanacademy.org	success	146.75.113.42	1	19ms	223.5.5.5
电信重庆两江电信	zh.khanacademy.org	success	146.75.113.42	1	131ms	223.5.5.5
电信广东清远电信	zh.khanacademy.org	success	146.75.113.42	1	71ms	223.5.5.5
电信陕西西安1电信	zh.khanacademy.org	success	199.232.161.42	1	12ms	223.5.5.5
电信云南文山电信	zh.khanacademy.org	success	146.75.113.42	1	113ms	223.5.5.5
电信天津电信	zh.khanacademy.org	success	199.232.161.42	1	297ms	223.5.5.5
电信安徽黄山电信	zh.khanacademy.org	success	151.101.193.42151.101.129.42151.101.1.42151.101.65.42	4	1ms	223.5.5.5
电信河北邢台电信	zh.khanacademy.org	success	199.232.161.42	1	223ms	223.5.5.5
电信浙江嘉兴电信	zh.khanacademy.org	dns server timeo	--	0	Timeout	223.5.5.5
电信江苏无锡电信	zh.khanacademy.org	success	199.232.161.42	1	90ms	223.5.5.5
电信福建漳州电信	zh.khanacademy.org	success	146.75.113.42	1	64ms	223.5.5.5
电信福建三明电信	zh.khanacademy.org	success	146.75.113.42	1	72ms	223.5.5.5
电信四川成都电信	zh.khanacademy.org	success	146.75.45.42	1	129ms	223.5.5.5
电信湖南株洲电信	zh.khanacademy.org	success	199.232.161.42	1	57ms	223.5.5.5
电信山东济南电信	zh.khanacademy.org	success	199.232.161.42	1	71ms	223.5.5.5
电信安徽安庆电信	zh.khanacademy.org	success	146.75.113.42	1	25ms	223.5.5.5
电信山东龙口电信	zh.khanacademy.org	success	199.232.161.42	1	73ms	223.5.5.5
电信安徽淮南电信	zh.khanacademy.org	success	146.75.113.42	1	39ms	223.5.5.5
电信广西南宁电信	zh.khanacademy.org	success	199.232.161.42	1	137ms	223.5.5.5
电信安徽合肥电信	zh.khanacademy.org	success	146.75.113.42	1	41ms	223.5.5.5
电信浙江绍兴电信	zh.khanacademy.org	dns server timeo	--	0	Timeout	223.5.5.5
电信安徽马鞍山电信	zh.khanacademy.org	success	146.75.113.42	1	106ms	223.5.5.5
电信内蒙古包头电信	zh.khanacademy.org	success	146.75.113.42	1	144ms	223.5.5.5
电信辽宁鞍山电信	zh.khanacademy.org	success	146.75.113.42	1	141ms	223.5.5.5
电信山东青岛电信	zh.khanacademy.org	success	199.232.161.42	1	90ms	223.5.5.5
电信安徽合肥电信	zh.khanacademy.org	success	146.75.113.42	1	25ms	223.5.5.5
电信河南郑州电信	zh.khanacademy.org	success	146.75.113.42	1	97ms	223.5.5.5
电信广西南宁1电信	zh.khanacademy.org	success	146.75.113.42	1	139ms	223.5.5.5
电信贵州贵阳电信	zh.khanacademy.org	success	199.232.161.42	1	135ms	223.5.5.5
电信新疆乌鲁木齐电信	zh.khanacademy.org	success	146.75.113.42	1	1305ms	223.5.5.5
电信贵州黔南电信	zh.khanacademy.org	success	146.75.113.42	1	97ms	223.5.5.5
电信西藏拉萨电信	zh.khanacademy.org	success	146.75.45.42	1	156ms	223.5.5.5
电信海南海口电信	zh.khanacademy.org	success	199.232.161.42	1	137ms	223.5.5.5
电信河北唐山电信	zh.khanacademy.org	success	199.232.161.42	1	139ms	223.5.5.5
电信湖北武汉电信	zh.khanacademy.org	success	151.101.1.42151.101.193.42151.101.129.42151.101.65.42	4	0ms	223.5.5.5
电信河南开封电信	zh.khanacademy.org	success	199.232.161.42	1	144ms	223.5.5.5
电信江苏南通电信	zh.khanacademy.org	success	146.75.113.42	1	77ms	223.5.5.5
电信江苏南京电信	zh.khanacademy.org	success	146.75.113.42	1	71ms	223.5.5.5
电信江西吉安电信	zh.khanacademy.org	success	199.232.161.42	1	106ms	223.5.5.5
电信广西玉林电信	zh.khanacademy.org	success	146.75.113.42	1	144ms	223.5.5.5
电信甘肃平凉电信	zh.khanacademy.org	success	146.75.113.42	1	72ms	223.5.5.5
电信福建宁德电信	zh.khanacademy.org	success	199.232.161.42	1	60ms	223.5.5.5
电信福建泉州电信	zh.khanacademy.org	success	199.232.161.42	1	57ms	223.5.5.5
电信浙江温州电信	zh.khanacademy.org	success	199.232.161.42	1	83ms	223.5.5.5
电信河南驻马店电信	zh.khanacademy.org	success	146.75.113.42	1	145ms	223.5.5.5
电信广东湛江电信	zh.khanacademy.org	success	146.75.113.42	1	29ms	223.5.5.5
电信浙江衢州电信	zh.khanacademy.org	success	146.75.113.42	1	80ms	223.5.5.5
电信江西赣州电信	zh.khanacademy.org	success	199.232.161.42	1	24ms	223.5.5.5
电信河南漯河电信	zh.khanacademy.org	success	146.75.113.42	1	147ms	223.5.5.5
电信湖南邵阳电信	zh.khanacademy.org	success	199.232.161.42	1	0ms	223.5.5.5
电信四川自贡电信	zh.khanacademy.org	success	146.75.113.42	1	131ms	223.5.5.5
电信广西柳州电信	zh.khanacademy.org	success	146.75.113.42	1	115ms	223.5.5.5
电信广东广州电信	zh.khanacademy.org	success	146.75.113.42	1	70ms	223.5.5.5
电信青海海东电信	zh.khanacademy.org	success	199.232.161.42	1	390ms	223.5.5.5
电信宁夏银川电信	zh.khanacademy.org	success	199.232.161.42	1	158ms	223.5.5.5
电信浙江丽水电信	zh.khanacademy.org	dns server timeo	--	0	Timeout	223.5.5.5
电信河南南阳电信	zh.khanacademy.org	success	146.75.113.42	1	104ms	223.5.5.5
电信吉林松原电信	zh.khanacademy.org	dns server timeo	--	0	Timeout	223.5.5.5
电信辽宁盘锦电信	zh.khanacademy.org	success	199.232.161.42	1	142ms	223.5.5.5
电信四川绵阳电信	zh.khanacademy.org	success	199.232.161.42	1	84ms	223.5.5.5
电信陕西咸阳电信	zh.khanacademy.org	success	146.75.113.42	1	114ms	223.5.5.5
电信河南信阳电信	zh.khanacademy.org	success	199.232.161.42	1	31ms	223.5.5.5
电信岳阳电信电信	zh.khanacademy.org	success	199.232.161.42	1	107ms	223.5.5.5
电信上海奉贤电信	zh.khanacademy.org	success	146.75.113.42	1	15ms	223.5.5.5
电信湖北咸宁电信	zh.khanacademy.org	success	199.232.161.42	1	60ms	223.5.5.5
电信北京电信	zh.khanacademy.org	success	199.232.161.42	1	63ms	223.5.5.5
电信甘肃武威电信	zh.khanacademy.org	success	199.232.161.42	1	112ms	223.5.5.5
电信湖北襄阳电信	zh.khanacademy.org	success	199.232.161.42	1	61ms	223.5.5.5
电信甘肃庆阳电信	zh.khanacademy.org	success	146.75.113.42	1	70ms	223.5.5.5
电信内蒙古呼和浩特电信	zh.khanacademy.org	success	146.75.113.42	1	140ms	223.5.5.5
电信陕西渭南电信	zh.khanacademy.org	success	146.75.113.42	1	58ms	223.5.5.5
电信陕西西安电信	zh.khanacademy.org	success	199.232.161.42	1	2ms	223.5.5.5
电信西藏山南电信	zh.khanacademy.org	success	146.75.45.42	1	165ms	223.5.5.5
电信宁夏中卫电信	zh.khanacademy.org	success	146.75.113.42	1	1046ms	223.5.5.5
电信山东枣庄电信	zh.khanacademy.org	success	199.232.161.42	1	12ms	223.5.5.5
电信山西晋中电信	zh.khanacademy.org	success	146.75.113.42	1	348ms	223.5.5.5
电信安徽芜湖电信	zh.khanacademy.org	success	146.75.113.42	1	37ms	223.5.5.5
电信上海黄浦电信	zh.khanacademy.org	success	146.75.113.42	1	73ms	223.5.5.5

DNS Test Findings for zh.khanacademy.org

Tested: Oct 25, 2026, 10:40 PM
Completed probes: 124/124
DNS response probes: 120 (96.8%)
Average DNS lookup time: 131 ms

This DNS lookup for zh.khanacademy.org ran on 2026-10-25 14:40. The DNS response rate was 96.8%, below the 99% reference threshold; 120 of 124 nodes returned a valid result and 4 did not. Median DNS lookup time was 95 ms, P90 159 ms and P95

zh.khanacademy.org 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 (%)

96.8%Highest rate

P50 DNS lookup time

DNS lookup time (ms)

95 msLowest P50

Key findings

The telecom carrier covered all 124 nodes, with 120 valid responses, a 96.8% response rate and an average DNS lookup time of 131 ms.
Telecom timing was 95 ms at P50, 159 ms at P90 and 391 ms at P95, so most lookups were quick while the tail was noticeably longer.
Unicom, mobile and overseas each had 0 nodes, so no comparison across carriers is possible from this run.
Eight distinct response addresses were observed; this reflects answer diversity only and does not establish that resolution was correct.

Improvement recommendations

The DNS response rate is 96.8%, 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.

zh.khanacademy.org DNS Lookup

Nationwide Speed Map