The address range of 233.0.0.0/8 is reserved for GLOP addressing, it was originally defined in RFC 2770 (superseded by RFC 3180) the RFC authors David Meyer & Peter Lothberg unfortunately didn’t define what GLOP stands for.

The cool thing about GLOP addressing is that every ASN has its own defined range for multicast. The first octet is always 224, and the 2nd and 3rd octets should be be the uniquely assigned ASN, and the final octet is locally administered. Therefore every ASN is provided with a pool of 256 addresses which they can use for internet multicast.

The restrictions of GLOP addressing only works with 2 byte ASNs, each ASN only has a pool of 256, also not having an acroynm or meaning for GLOP will bug me so im bound to be up all night thinking of acronyms of GLOP.