| Property | Value |
| host.master@21st.com | |
| NameServer | DMTU.MT.NS.ELS-GMS.ATT.NET |
| Created | 1994-12-08 00:00:00 |
| Changed | 2012-08-16 00:00:00 |
| Expires | 2016-12-07 00:00:00 |
| Registrar | MARKMONITOR INC. |
| Date | IP Address |
| 2014-02-21 | 63.149.195.12 (ClassC) |
| 2014-03-23 | 63.211.90.248 (ClassC) |
| 2020-01-06 | 63.233.60.232 (ClassC) |
| 2020-02-10 | 23.10.240.42 (ClassC) |
| 2020-06-08 | 23.215.98.131 (ClassC) |
| 2020-06-15 | 184.24.98.192 (ClassC) |
| 2020-06-15 | 184.24.98.226 (ClassC) |
| 2025-08-01 | 208.45.133.108 (ClassC) |
| Date | Domain | IP |
| n10.21st.com | 2025-05-24 | 45.60.152.113 |
| NS2.21ST.COM | 2025-07-09 | 12.177.226.27 |
| proxypoc.21st.com | 2025-03-26 | 45.60.12.23 |
| f.e.21st.com | 2025-08-01 | 208.45.133.108 |
| m.21st.com | 2025-07-01 | 45.60.12.23 |
| claims.21st.com | 2024-10-17 | 104.92.252.92 |
| www.21st.com | 2025-07-16 | 45.60.152.113 |