These entries are queried from radb.net using whois, you can try my project getting these.
:AS39987 route: 64.49.112.0/20 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS39987 remarks: Proxy add for EDIA customer Kent_In mnt-by: MAINT-AS7922 changed: sung_kim [at] comcast.com 20230720 source: RADB last-modified: 2023-11-13T16:17:48Z rpki-ov-state: valid route: 64.49.112.0/20 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:57:09Z last-modified: 2023-03-07T15:57:09Z source: ARIN rpki-ov-state: valid route: 64.49.112.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:35:51Z last-modified: 2023-03-07T15:35:51Z source: ARIN rpki-ov-state: valid route: 64.49.113.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:36:55Z last-modified: 2023-03-07T15:36:55Z source: ARIN rpki-ov-state: valid route: 64.49.115.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:37:47Z last-modified: 2023-03-07T15:37:47Z source: ARIN rpki-ov-state: valid route: 64.49.121.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:39:45Z last-modified: 2023-03-07T15:39:45Z source: ARIN rpki-ov-state: valid route: 64.49.122.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:40:31Z last-modified: 2023-03-07T15:40:31Z source: ARIN rpki-ov-state: valid route: 64.49.123.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:40:59Z last-modified: 2023-03-07T15:40:59Z source: ARIN rpki-ov-state: valid route: 64.49.124.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:41:30Z last-modified: 2023-03-07T15:41:30Z source: ARIN rpki-ov-state: valid route: 64.49.125.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:42:02Z last-modified: 2023-03-07T15:42:02Z source: ARIN rpki-ov-state: valid route: 64.49.126.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:43:10Z last-modified: 2023-03-07T15:43:10Z source: ARIN rpki-ov-state: valid route: 64.49.127.0/24 origin: AS39987 descr: 2930 Knapp Ne Grand Rapids MI 49525 United States admin-c: LILLI8-ARIN tech-c: LILLI8-ARIN mnt-by: MNT-KISD created: 2023-03-07T15:43:30Z last-modified: 2023-03-07T15:43:30Z source: ARIN rpki-ov-state: valid