These entries are queried from radb.net using whois, you can try my project getting these.
:AS62983 route: 38.97.71.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: nicholas.noda [at] crowncastle.com 20230922 source: RADB last-modified: 2023-11-13T16:18:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.165.137.0/24 descr: The Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: robert.hinst [at] crowncastle.com 20190214 #19:39:41Z source: RADB last-modified: 2023-11-13T15:55:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.232.0/21 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.232.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.233.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.234.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.235.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.236.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.237.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.238.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.143.239.0/24 descr: Massachusetts Port Authority origin: AS62983 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140724 source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source