HI Mahesh, [Pls RATE if HELPS]
MOST of the Level-1 ISP's will accept the Prefixe's only if the "Route-Object" is created with APNIC.
The APNIC is the General body, authorises the Prefixes to which company they belong / registered to and in addition how it was advertised to the Service Provider and what are the Primary / Secondary / Tertiary provider details.
This Enable's easy database Management across Internet Cloud.
All ISP will accept and also advertise only /24 prefix and not more than that. It's a General Standard followed across the Internet Cloud to avoid the Network Failures. This standard was followed, to avoid the more specific prefixes took over the aggregation routes.
Hope I am Informative.
Pls RATE if HELPS
Best Regards,
Guru Prasad R