BGP Announced
| AS | CIDR | Description |
|---|---|---|
| AS4538 |
121.251.56.0/23
|
ERX-CERNET-BKB - China Education and Research Network Center, CN |
| AS24362 | 121.251.56.0/23 | CNGI-HEF-IX-AS-AP - CERNET2 IX at University of Science and Technology of China, CN |
| AS4538 |
121.250.0.0/15
|
ERX-CERNET-BKB - China Education and Research Network Center, CN |
| AS4538 |
121.248.0.0/14
|
ERX-CERNET-BKB - China Education and Research Network Center, CN |
Real Time BGP Data
| AS / Info | IP / Time | AS Path |
|---|---|---|
| Loading... | ||
Reverse DNS List (Total:12)
| IP | Host | DateTime |
|---|---|---|
| 121.251.56.1 | dns1.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.2 | dns2.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.15 | oj.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.16 | jp.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.23 | gxsf.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.28 | szpt.mastc.edu.cn | 2025-04-22 16:26:09 |
| 121.251.56.32 | sfjs.mastc.edu.cn zzkc.mastc.edu.cn sfjsread.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.37 | rc.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.108 | card.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.109 | icard.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.110 | wd.mastc.edu.cn | 2025-04-27 05:54:12 |
| 121.251.56.118 | wx.mastc.edu.cn | 2025-04-27 05:54:12 |
Top 20 / total ASN
| Country / Region | Allocated ASNs | ASN IPv4 Number | ASN IPv6 Number(/64) |
|---|---|---|---|
United States
|
31364 | 1465225433 | 1153867564979135570 |
Brazil
|
9025 | 86352606 | 2305871890696081410 |
China
|
6567 | 346911140 | 147459299626608 |
India
|
5952 | 35371008 | 24479184113664 |
Russian Federation
|
5746 | 46655672 | 10753306767432 |
Indonesia
|
3581 | 17930496 | 1213295689728 |
Germany
|
3103 | 112785928 | 69629897736192 |
United Kingdom
|
3100 | 72792928 | 31079935115264 |
Australia
|
3009 | 40588080 | 20492802529280 |
Poland
|
2468 | 19493888 | 15495680431104 |
Canada
|
2438 | 54425448 | 4495745090816 |
France
|
2202 | 75287296 | 12213247804928 |
Ukraine
|
2008 | 8498688 | 5322934517760 |
Bangladesh
|
1867 | 1899008 | 900172283904 |
Netherlands
|
1598 | 51394256 | 27397476124160 |
Argentina
|
1298 | 19697152 | 18791486980096 |
Italy
|
1295 | 52409472 | 28646851018752 |
Hong Kong
|
1280 | 17850820 | 7879974650624 |
Japan
|
1266 | 159065448 | 33553585668096 |
Spain
|
1236 | 34576896 | 7530784034816 |