RIPE NCC Internet Numbers Registration Procedures
This documents obsoletes ripe-65, version 0.6 of this document
This document describes the procedures for the reassignment of IP
network numbers from blocks obtained from the RIPE Network Coordination
Centre. It deals with items as providing information for the RIPE
database, as well as reassignment of IP addresses in light of
the "Supernetting" proposal, as documented in RFC 1338, by Vince Fuller
Since May 1st 1992, the RIPE Network Coordination Centre (NCC) is
acting as a delegated registry for IP networks numbers to NICs and NOCs
in Europe. It is RIPE NCC policy not to give out network numbers to
individual organisations, who should refer in turn, to their IP network
The mission of the RIPE NCC is to give network numbers to the various
service providers and NICs. The NICs and NOCs can then reassign the
actual IP network numbers to organisations requesting IP network
Class B Network Number Allocation Procedure
Service providers can request Class B network numbers on a one-by-one
basis from the RIPE NCC. Because class B address space is a critical
resource, a request for a class B network number must be accompanied by
a justification in terms of the requesting organisation's size, current
network and expected network growth. The requestor should also make
clear why they cannot use a block of class C network numbers to achieve
their goals. The RIPE NCC will review requests using the same standards
as any other Internet Registry, particularly the US NIC.
Class C Allocation Procedures
NICs and NOCs accepting a block of class C numbers agree to adhere to
the following procedures:
A) The RIPE NCC will assign complete class C blocks to individual NICs
and NOCs. They can be requested from <email@example.com>.
B) In order to prevent implementation problems, network numbers ending
with 0 or 255 should NOT be reassigned.
C) Full information about reassigned network numbers must be reported
back to the RIPE NCC in full RIPE database format (ref ripe-13).
The complete entries should be sent immediately after reassignment to
The RIPE NCC is ready to accept block entries for the RIPE database.
For block syntax, please contact the RIPE NCC.
D) Reassignment of class C network numbers should be done in a manner