These entries are queried from radb.net using whois, you can try my project getting these.
:AS5972 route: 214.1.98.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.1.99.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.110.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.112.0/23 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.112.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.113.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.126.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.216.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 214.2.244.0/24 descr: CenturyLink Proxy object remarks: to be deleted in March 2017 origin: AS5972 notify: job [at] ntt.net mnt-by: MAINT-JOB changed: job [at] ntt.net 20160901 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source