niagara.blackboard.com服务器iP：
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历史解析记录：
2023-11-22-----2023-11-22 54.173.164.24
2023-11-22-----2023-11-22 54.162.50.72
2023-11-22-----2023-11-22 44.199.4.33
2022-12-18-----2022-12-18 18.214.116.10
2022-12-18-----2022-12-18 54.204.144.172
2022-12-18-----2022-12-18 100.24.85.123
2021-12-17-----2021-12-17 52.5.251.140
2021-12-17-----2021-12-17 54.205.104.39
2021-12-17-----2021-12-17 34.234.55.69
2021-12-17-----2021-12-17 54.163.91.113
2021-09-23-----2021-09-23 52.21.80.153
2021-09-23-----2021-09-23 3.225.121.103
2021-05-08-----2021-05-08 34.196.90.209
2021-05-08-----2021-05-08 3.211.61.224
2019-07-14-----2019-07-29 34.200.141.85
2019-07-14-----2019-07-29 34.230.179.13
2019-07-29-----2019-07-29 34.193.244.125
2019-07-29-----2019-07-29 18.215.51.52
2019-07-14-----2019-07-14 107.23.4.236
2019-07-14-----2019-07-14 18.214.92.119
2018-01-26-----2018-01-26 69.196.224.18