These entries are queried from radb.net using whois, you can try my project getting these.
:AS11917 route: 66.111.48.0/24 origin: AS11917 descr: WhatsApp mnt-by: MAINT-AS32934 changed: noc [at] fb.com 20190414 #06:00:01Z source: RADB route: 66.111.49.0/24 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200612 route: 66.111.51.0/24 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200822 route: 66.111.50.0/24 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200822 route: 66.111.48.0/22 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20210320 route: 66.111.48.0/22 descr: WhatsApp descr: 1601 Willow Road descr: Menlo Park, CA 94025 descr: US origin: AS11917 mnt-by: MNT-WHATS changed: domain [at] whatsapp.com 20190320 source: ARIN route6: 2620:13e:100f::/48 origin: AS11917 descr: WhatsApp mnt-by: MAINT-AS32934 changed: noc [at] fb.com 20190414 #05:58:57Z source: RADB route6: 2620:13e:100e::/48 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200612 route6: 2620:13e:100d::/48 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200822 route6: 2620:13e:100c::/48 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20200822 route6: 2620:13e:1000::/44 descr: WhatsApp origin: AS11917 mnt-by: MAINT-AS32934 source: RADB changed: utl-fb_sa [at] fb.com 20210320 route6: 2620:13E:1000::/44 descr: WhatsApp descr: 1601 Willow Road descr: Menlo Park, CA 94025 descr: US origin: AS11917 mnt-by: MNT-WHATS changed: domain [at] whatsapp.com 20190320 source: ARIN