Domain Name: concentration.cn ROID: 20230428s10001s52331815-cn Domain Status: ok Registrant: 洪文朴 Registrant Contact Email: buydomain@xmkk.com Sponsoring Registrar: 阿里云计算有限公司（万网） Name Server: ns4.afternic.com Name Server: ns3.afternic.com Registration Time: 2023-04-28 04:03:40 Expiration Time: 2025-04-28 04:03:40 DNSSEC: unsigned