These entries are queried from radb.net using whois, you can try my project getting these.
:AS136518 route: 147.76.54.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 9 720 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2019-03-13T23:52:27Z source: APNIC rpki-ov-state: valid route: 147.76.55.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 9 720 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2019-03-13T23:52:27Z source: APNIC rpki-ov-state: valid route: 147.76.60.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 9 720 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2019-03-13T23:52:27Z source: APNIC rpki-ov-state: valid route: 147.76.62.0/24 descr: origin: AS136518 mnt-by: MAINT-AU-NEC last-modified: 2019-03-28T02:35:11Z source: APNIC rpki-ov-state: valid route: 147.76.63.0/24 descr: origin: AS136518 mnt-by: MAINT-AU-NEC last-modified: 2019-03-28T02:37:19Z source: APNIC rpki-ov-state: valid route: 147.76.64.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2023-07-13T05:13:58Z source: APNIC rpki-ov-state: valid route: 147.76.65.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2023-07-13T05:13:59Z source: APNIC rpki-ov-state: valid route: 147.76.66.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2023-07-13T05:13:59Z source: APNIC rpki-ov-state: valid route: 147.76.99.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2021-10-14T22:07:35Z source: APNIC rpki-ov-state: valid route: 147.76.100.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2021-10-14T22:07:25Z source: APNIC rpki-ov-state: valid route: 147.76.101.0/24 origin: AS136518 descr: NEC Australia Pty Ltd Level 11 717 Bourke St mnt-by: MAINT-AU-NEC last-modified: 2021-10-14T21:56:10Z source: APNIC rpki-ov-state: valid