These entries are queried from radb.net using whois, you can try my project getting these.
:AS25844 route: 162.90.0.0/16 descr: Skadden Arps origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:19:58Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.0.0/22 origin: AS25844 descr: newEdge mnt-by: MAINT-AS62833 changed: ghutchison [at] extenetsystems.com 20201209 #19:53:47Z source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.96.0/20 descr: Skadden Miamisburg origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:18:43Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.96.0/24 descr: Skadden USA origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:21:20Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.97.0/24 descr: Skadden USA origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:22:03Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.98.0/24 descr: SAVVISJP origin: AS25844 mnt-by: MAINT-SAVVISJP changed: kazuki.fujitani [at] savvis.net 20030924 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.98.0/24 descr: PACNET (proxy-registered route object) origin: AS25844 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: 2023-11-13T15:58:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.99.0/24 descr: Skadden EU origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:23:39Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.112.0/20 descr: Skadden Tokyo origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20030905 source: RADB last-modified: 2023-11-13T15:40:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.144.0/20 descr: Skadden, Arps, Slate, Meagher & Flom LLP Miamisburg origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20100204 #19:08:58Z source: RADB last-modified: 2023-11-13T15:40:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.160.0/20 descr: Skadden, Arps, slate, Meagher & Flom LLP White Plains origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20100204 #19:08:45Z source: RADB last-modified: 2023-11-13T15:40:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.176.0/20 descr: Skadden origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20130601 #17:30:28Z source: RADB last-modified: 2023-11-13T15:45:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.90.192.0/20 descr: Skadden, Arps, Slate, Meagher & Flom LLP Japan origin: AS25844 remarks: MAINT-AS25844 notify: alee [at] skadden.com mnt-by: MAINT-AS25844 changed: alee [at] skadden.com 20100204 #19:10:41Z source: RADB last-modified: 2023-11-13T15:40:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source