These entries are queried from radb.net using whois, you can try my project getting these.
:AS33506 route: 74.112.160.0/22 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS33506 remarks: Proxy Route Add for Comcast Customer-Commputercations_Inc mnt-by: MAINT-AS7922 changed: dave_hill [at] cable.comcast.com 20110803 #15:53:25Z source: RADB last-modified: 2023-11-13T15:54:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.112.160.0/22 descr: Proxy-registered route origin: AS33506 remarks: Registered by Shentel (AS4922)for AS33506 notify: gene.jeffers [at] emp.shentel.com mnt-by: MAINT-SHENTEL changed: gene.jeffers [at] emp.shentel.com 20101208 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.112.161.0/24 origin: AS33506 descr: proxy ROUTE object for COMMPUTERCATIONS by CORESITE admin-c: REEDC55-ARIN tech-c: REEDC55-ARIN mnt-by: MAINT-AS2734 changed: chris.reed [at] coresite.com 20200901 #17:19:26Z source: RADB last-modified: 2023-11-13T16:17:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source