Can I obtain a class C address block?

Classful addressing (class A, class B, class C, etc) is now redundant and the RIPE NCC no longer uses that terminology. The original model for distributing IP addresses, based on classful addressing strategies, did not take into account the massive expansion of Internet use and was unable to scale to meet this expansion. Classless Inter Domain Routing (CIDR) is now one of the fundamental requirements for eligibility to receive IP address ranges.

All requests for address space must be supported by documentation showing a technically justified need for the quantity requested (that is, they must be used efficiently, according to best current practice). Quantities of address space are now referred to by their prefix length (or subnet mask). For example, /24 ("slash 24") refers to 256 IP address numbers, or the equivalent of a former class C; and /19 refers to 8,192 IP address numbers, or the equivalent of 32 former class Cs.