History for dns4.zfc.edu.cn
Domain: zfc.edu.cn • Tracking since 2026-08-04 23:25 UTC
DNS response history for dns4.zfc.edu.cn
dns4.zfc.edu.cn is a DNS nameserver monitored by NameServerHistory. This page provides historical DNS response-time data, nameserver uptime signals, DNS latency observations, resolved IP history, successful response counts, failed response counts, and reliability indicators for this nameserver.
The selected UTC date is 2026-08-26. For this date, NameServerHistory found 48 DNS check records, 47 successful responses, 1 failed responses, and 3242 ms average response time. Current selected-date status: At least one successful DNS response was recorded for the selected date.
- Use this report to investigate historical DNS uptime and nameserver reliability.
- Compare DNS latency changes, failed DNS checks, and response behavior over time.
- Review the latest resolved IP address and raw DNS check history for dns4.zfc.edu.cn.
Records on Selected Date
48
Historical checks stored for this nameserver on selected date
Average Latency
3242 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-26 16:06
All timestamps shown in UTC
Latest Resolved IP on Selected Date
221.12.20.55
Most recently resolved hosting IP on selected date
Successful Responses
47
Checks that returned a measurable response
Failed Responses
1
Checks with no response or no returned latency
Failure Rate
2%
Based on the selected date history
Selected Date Status
Responsive
At least one successful response exists on selected date
History for dns4.zfc.edu.cn
Showing DNS history for 2026-08-26 UTC. Newest records appear first.
Latency bars are scaled to a maximum of 5000 ms for quick visual comparison.
| # | Query Time (UTC) | Correlation ID | Latency | Response | IP Address |
|---|---|---|---|---|---|
| 48 | 2026-08-26 16:06 | 639233561188633861 |
|
4312 ms | 221.12.20.55 |
| 47 | 2026-08-26 15:48 | 639233550544357027 |
|
3767 ms | 221.12.20.55 |
| 46 | 2026-08-26 14:53 | 639233517966053117 |
|
2321 ms | 221.12.20.55 |
| 45 | 2026-08-26 14:36 | 639233507603253585 |
|
4313 ms | 221.12.20.55 |
| 44 | 2026-08-26 14:18 | 639233497229039167 |
|
1566 ms | 221.12.20.55 |
| 43 | 2026-08-26 14:01 | 639233486864546406 |
|
4321 ms | 221.12.20.55 |
| 42 | 2026-08-26 13:44 | 639233476455174682 |
|
2318 ms | 221.12.20.55 |
| 41 | 2026-08-26 13:27 | 639233466171592605 |
|
4309 ms | 221.12.20.55 |
| 40 | 2026-08-26 13:09 | 639233455747096265 |
|
4306 ms | 221.12.20.55 |
| 39 | 2026-08-26 12:52 | 639233445367152284 |
|
4317 ms | 221.12.20.55 |
| 38 | 2026-08-26 12:35 | 639233434974187439 |
|
765 ms | 221.12.20.55 |
| 37 | 2026-08-26 12:17 | 639233424567558554 |
|
4319 ms | 221.12.20.55 |
| 36 | 2026-08-26 12:00 | 639233414056832719 |
|
- | |
| 35 | 2026-08-26 11:43 | 639233403515141099 |
|
4308 ms | 221.12.20.55 |
| 34 | 2026-08-26 10:48 | 639233370841350248 |
|
4311 ms | 221.12.20.55 |
| 33 | 2026-08-26 10:31 | 639233360361507238 |
|
2486 ms | 221.12.20.55 |
| 32 | 2026-08-26 10:13 | 639233350067824371 |
|
2447 ms | 221.12.20.55 |
| 31 | 2026-08-26 09:56 | 639233339545274518 |
|
4314 ms | 221.12.20.55 |
| 30 | 2026-08-26 09:38 | 639233329214918079 |
|
4323 ms | 221.12.20.55 |
| 29 | 2026-08-26 09:21 | 639233318749762337 |
|
4318 ms | 221.12.20.55 |
| 28 | 2026-08-26 09:04 | 639233308387917838 |
|
2011 ms | 221.12.20.55 |
| 27 | 2026-08-26 08:46 | 639233297961740122 |
|
2324 ms | 221.12.20.55 |
| 26 | 2026-08-26 08:29 | 639233287487159094 |
|
4345 ms | 221.12.20.55 |
| 25 | 2026-08-26 08:12 | 639233276995531707 |
|
2320 ms | 221.12.20.55 |
| 24 | 2026-08-26 07:54 | 639233266521568229 |
|
2558 ms | 221.12.20.55 |
| 23 | 2026-08-26 07:37 | 639233256081047431 |
|
2566 ms | 221.12.20.55 |
| 22 | 2026-08-26 06:42 | 639233223620132921 |
|
4310 ms | 221.12.20.55 |
| 21 | 2026-08-26 06:25 | 639233213287814244 |
|
2033 ms | 221.12.20.55 |
| 20 | 2026-08-26 06:08 | 639233202925983161 |
|
1761 ms | 221.12.20.55 |
| 19 | 2026-08-26 05:51 | 639233192644780696 |
|
2469 ms | 221.12.20.55 |
| 18 | 2026-08-26 05:34 | 639233182401183833 |
|
4317 ms | 221.12.20.55 |
| 17 | 2026-08-26 05:17 | 639233172074181051 |
|
3532 ms | 221.12.20.55 |
| 16 | 2026-08-26 04:59 | 639233161808421455 |
|
2313 ms | 221.12.20.55 |
| 15 | 2026-08-26 04:42 | 639233151357344052 |
|
3798 ms | 221.12.20.55 |
| 14 | 2026-08-26 04:25 | 639233141034116946 |
|
3821 ms | 221.12.20.55 |
| 13 | 2026-08-26 04:08 | 639233130828334142 |
|
4307 ms | 221.12.20.55 |
| 12 | 2026-08-26 03:50 | 639233120373450007 |
|
2267 ms | 221.12.20.55 |
| 11 | 2026-08-26 03:33 | 639233110066216193 |
|
3798 ms | 221.12.20.55 |
| 10 | 2026-08-26 02:40 | 639233078065410564 |
|
2273 ms | 221.12.20.55 |
| 9 | 2026-08-26 02:23 | 639233067787457832 |
|
2289 ms | 221.12.20.55 |
| 8 | 2026-08-26 02:05 | 639233057501801162 |
|
2292 ms | 221.12.20.55 |
| 7 | 2026-08-26 01:48 | 639233047089431703 |
|
4323 ms | 221.12.20.55 |
| 6 | 2026-08-26 01:31 | 639233036754790688 |
|
4301 ms | 221.12.20.55 |
| 5 | 2026-08-26 01:14 | 639233026412602472 |
|
4312 ms | 221.12.20.55 |
| 4 | 2026-08-26 00:56 | 639233016064066127 |
|
1845 ms | 221.12.20.55 |
| 3 | 2026-08-26 00:39 | 639233005922655772 |
|
2579 ms | 221.12.20.55 |
| 2 | 2026-08-26 00:22 | 639232995672256907 |
|
1556 ms | 221.12.20.55 |
| 1 | 2026-08-26 00:05 | 639232985300872416 |
|
4303 ms | 221.12.20.55 |