IP / ASN / Domain Lookup
IP Lookup Result
IP Address
121.251.56.28szpt.mastc.edu.cn.
Location
China,Jiangsu,Nanjing
ASN
Company
IDC
CERNET2 IX at University of Science and Technology of China
Longitude
118.8729
118.8729
Latitude
31.9657
31.9657
Roaming IP
DataCenter
32%Risk Score
32% Risk Score
IP Address (Decimal)
2046507036
Latency
US
-
HK
-
CA
-
GB
-
DE
-
AU
-
ASN History
ASN History | Network | AS Organization | Country | First Seen | Last Seen |
|---|---|---|---|---|---|
| 121.250.0.0/15 | EDU CERNET-CN | China | 📅 2017-01-01 08:39 | 📅 2026-01-02 14:28 | |
| 121.248.0.0/14 | EDU CERNET-CN | China | 📅 2010-01-14 22:22 | 📅 2026-01-02 14:28 | |
| 121.251.56.0/23 | EDU CERNET2 IX at University of Science and Technology of China | China | 📅 2020-01-05 00:12 | 📅 2025-12-24 23:24 | |
| 121.251.56.0/23 | EDU CERNET-CN | China | 📅 2012-01-25 23:19 | 📅 2025-12-24 23:24 | |
| 121.248.0.0/14 | IDC Flat C, 16/F, Skyline Tower, | Hong Kong SAR China | 📅 2018-02-28 17:04 | 📅 2018-03-06 15:18 | |
| 121.0.0.0/8 | GOV RIPE NCC ASN block | -- | 📅 2010-02-18 12:59 | 📅 2010-02-18 13:01 | |
| 121.0.0.0/8 | ISP PTCL | Pakistan | 📅 2007-02-13 19:59 | 📅 2007-02-14 14:24 | |
| 121.0.0.0/8 | ISP ip telecom | Italy | 📅 2006-11-09 17:59 | 📅 2006-11-09 18:08 | |
| 121.128.0.0/9 | ISP Verizon Business | United States | 📅 2006-05-02 02:38 | 📅 2006-06-20 13:21 | |
| 121.0.0.0/8 | ENT Abitcool(China) Inc. | China | 📅 2005-08-31 10:16 | 📅 2005-11-25 05:30 | |
| 121.0.0.0/8 | ISP MTN SA | South Africa | 📅 2003-12-09 13:07 | 📅 2005-08-11 17:45 | |
| 121.0.0.0/8 | ISP Kertinis valstybes telekomunikaciju centras | Lithuania | 📅 2005-06-09 20:39 | 📅 2005-06-09 21:21 | |
| 121.0.0.0/8 | -- | 📅 2004-06-18 04:47 | 📅 2004-12-14 19:49 | ||
| 121.0.0.0/8 | ISP TDCSONG | Sweden | 📅 2004-05-07 19:39 | 📅 2004-05-26 13:58 | |
| 121.0.0.0/8 | IDC Level 3 Parent, LLC | United States | 📅 2004-03-25 22:55 | 📅 2004-03-26 01:41 | |
| 121.0.0.0/8 | ISP Harbor Communications | United States | 📅 2003-03-03 02:55 | 📅 2003-03-03 03:44 |
Company History
Company History | Network | First Seen | Last Seen |
|---|---|---|---|
IDC APNIC-121 | 121.0.0.0/8 | 📅 2006-01-06 08:00 | 📅 2026-01-04 17:59 |
IDC NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK | 121.127.64.0/8 | 📅 2022-12-08 23:20 | 📅 2026-01-04 17:59 |
EDU NJR-CERNET | 121.248.0.0/14 | 📅 2020-09-03 17:15 | 📅 2026-01-03 09:53 |
Registration History
Status | Network | Registry | Country | First Seen | Last Seen |
|---|---|---|---|---|---|
| 121.0.0.0/8 |  ARIN | -- | 📅 2006-01-06 08:00 | 📅 2026-01-04 17:59 | |
| 121.127.64.0/8 |  RIPE | European Union | 📅 2022-12-08 23:20 | 📅 2026-01-04 17:59 | |
| 121.248.0.0/14 |  APNIC | China | 📅 2020-09-03 17:15 | 📅 2026-01-03 09:53 |
