These entries are queried from radb.net using whois, you can try my project getting these.
:AS23599 route: 1.18.122.0/24 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-06-08T06:58:29Z last-modified: 2018-09-04T19:15:33Z 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: 1.18.123.0/24 origin: AS23599 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea mnt-by: MNT-KRNIC-AP last-modified: 2018-04-26T01:18:27Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.123.0/24 descr: AS23599 origin: AS23599 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20161225 #03:48:51Z source: RADB last-modified: 2023-11-13T15:50:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.123.0/24 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-06-08T06:58:46Z last-modified: 2018-09-04T19:15:33Z 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: 1.18.125.0/24 origin: AS23599 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea mnt-by: MNT-KRNIC-AP last-modified: 2018-04-26T01:18:40Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.125.0/24 descr: AS23599 origin: AS23599 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20161225 #03:48:51Z source: RADB last-modified: 2023-11-13T15:50:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.125.0/24 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-06-08T06:59:04Z last-modified: 2018-09-04T19:15:34Z 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: 1.18.126.0/24 descr: AS23599 origin: AS23599 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20161225 #03:48:51Z source: RADB last-modified: 2023-11-13T15:50:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.126.0/24 origin: AS23599 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea mnt-by: MNT-KRNIC-AP last-modified: 2018-04-26T01:18:59Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.18.126.0/24 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-06-08T06:59:17Z last-modified: 2018-09-04T19:15:34Z 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: 203.83.159.0/24 descr: National Internet Development Agency of Korea country: KR origin: AS23599 mnt-by: MNT-KRNIC-AP last-modified: 2008-09-04T07:55:02Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.83.159.0/24 descr: PACNET (proxy-registered route object) origin: AS23599 remarks: This route object is for a PACNET customer route which is being exported under this origin AS. + This route object was created because no existing route object with the same origin was found, and since some PACNET peers filter based on these objects this route may be rejected if this object is not created. + Please contact abuse [at] pacnet.net if you have any Concerns regarding Spam/Abuses related to this object + Please contact ip-noc [at] pacnet.net if you have any other Questions regarding this object. notify: ip-noc [at] pacnet.net mnt-by: MAINT-AS4637 changed: ip-noc [at] pacnet.net 20100201 source: RADB last-modified: 2023-11-13T15:58:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.83.159.0/24 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-05-28T07:52:36Z last-modified: 2018-09-04T19:13:47Z 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 route6: 2001:dcc:4::/48 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-05-28T07:55:41Z last-modified: 2018-09-04T19:48:48Z 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 route6: 2001:dcc:4::/48 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea origin: AS23599 mnt-by: MNT-KRNIC-AP last-modified: 2018-06-01T00:54:42Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:dcc:4::/48 descr: KINX-DDNS origin: AS23599 mnt-by: MAINT-AS9957 changed: noc [at] kinx.net 20140729 #01:35:11Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:dcc:401::/48 descr: KINX-DDNS origin: AS23599 mnt-by: MAINT-AS9957 changed: noc [at] kinx.net 20140729 #02:22:08Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:dcc:401::/48 origin: AS23599 mnt-by: MNT-KRNIC created: 2018-05-28T07:56:03Z last-modified: 2018-09-04T19:48:48Z 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 route6: 2001:dcc:401::/48 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea origin: AS23599 mnt-by: MNT-KRNIC-AP last-modified: 2018-06-01T00:54:25Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:dcc:403::/48 origin: AS23599 descr: Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea mnt-by: MNT-KRNIC-AP last-modified: 2020-12-22T12:22:07Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source