These entries are queried from radb.net using whois, you can try my project getting these.
:AS20258 route: 137.71.0.0/16 descr: Analog Devices origin: AS20258 mnt-by: MAINT-AS27506 changed: mdimambro [at] lightower.com 20181203 source: RADB last-modified: 2023-11-13T15:55:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.23.0/24 descr: Analog Devices, Inc. origin: AS20258 mnt-by: MAINT-AS27506 changed: slefevre [at] lightower.com 20151222 source: RADB last-modified: 2023-11-13T15:48:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.24.0/23 descr: Analog Devices origin: AS20258 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20171211 source: RADB last-modified: 2023-11-13T15:52:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.34.0/23 descr: Analog Devices origin: AS20258 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20171211 source: RADB last-modified: 2023-11-13T15:52:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.109.0/24 descr: To allow routing to other ISPs origin: AS20258 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20191204 source: RADB last-modified: 2023-11-13T15:59:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.114.0/24 descr: Analog Device Phils. origin: AS20258 remarks: IP Transit Client mnt-by: MAINT-PLDT changed: pjmagbiro [at] pldt.com.ph 20170724 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.115.0/24 descr: Analog Devices Phils. origin: AS20258 remarks: IP Transit Client notify: NAS1-n4i [at] pldt.com.ph notify: NetRes_Core [at] pldt.com.ph mnt-by: MAINT-PLDT changed: admontales [at] pldt.com.ph 20120717 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.116.0/23 descr: Analog Device Phils. origin: AS20258 remarks: IP Transit Client notify: nas1-n4i [at] pldt.com.ph mnt-by: MAINT-PLDT changed: cemanalang [at] pldt.com.ph 20120619 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.160.0/23 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS20258 remarks: Proxy add for EDIA customer Analog Devices, Inc mnt-by: MAINT-AS7922 changed: ryan_mcclean [at] comcast.com 20190130 source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.162.0/23 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS20258 remarks: Proxy add for EDIA customer Analog Devices, Inc mnt-by: MAINT-AS7922 changed: ryan_mcclean [at] comcast.com 20190130 source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.226.0/23 origin: AS20258 mnt-by: mnt-ANALOG created: 2017-09-25T13:58:49Z last-modified: 2018-09-04T18:57:14Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.230.0/24 descr: Analog Devices descr: Limerick descr: Ireland origin: AS20258 remarks: copy from ARIN-NONAUTH mnt-by: MAINT-BT changed: herb.coelho [at] analog.com source: NTTCOM last-modified: 2022-03-29T15:59:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.246.0/24 origin: AS20258 mnt-by: mnt-ANALOG created: 2017-09-25T13:59:28Z last-modified: 2018-09-04T18:57:14Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.71.249.0/24 descr: Analog Devices descr: Limerick descr: Ireland origin: AS20258 remarks: copy from ARIN-NONAUTH mnt-by: MAINT-BT changed: herb.coelho [at] analog.com source: NTTCOM last-modified: 2022-03-29T15:59:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source