IP Tracking via LIR NIR RIR / Or requesting IP addresses | RFC3330 | RFC2050

Sometimes its necesary to track down a IP range, especialy if someone is
bothering you and no DNS info is available, in those cases you can go to the
IP Registry databases. Yes, Thats correct, more then one. Here under you
find the ones you can search.

Both IPv4 and IPv6 addresses are assigned in a delegated manner. Users are
assigned IP addresses by Internet service providers (ISPs). ISPs obtain
allocations of IP addresses from a local Internet registry (LIR) or national
Internet registry (NIR), or from their appropriate Regional Internet
Registry (RIR):

APNIC (Asia Pacific Network Information Centre) - Asia/Pacific Region

ARIN (American Registry for Internet Numbers) - Americas and Sub-Sahara Africa

LACNIC (Regional Latin-American and Caribbean IP Address Registry) – Latin America and some Caribbean Islands

RIPE NCC (Réseaux IP Européens) - Europe, the Middle East, Central Asia, and African countries located north of the equator