There are 3 repositories under arin topic.
CIDR country-level IP data, straight from the Regional Internet Registries, updated hourly. This is a read-only mirror.
An RPKI Validator and RTR server written in Rust
Cloudflare's RPKI Toolbox
Parse Network Info Databases (ARIN/APNIC/LACNIC/AfriNIC/RIPE)
Hourly Checked and Updated Spamhaus IP Addresses lists
Official-IANA-IP-blocks for each country | IPV4 and IPV6 | TEXT | CSV | JSON
offline lookup (by IP/ASN) of other IPs/ASNs owned by the same organization (directly from cached RIR data)
A lot of IP lookups only query ARIN, this is a quick and easy example how to query the correct whois databases to get the IP address network owners
A fully featured RIPEStat Data API Client
ARIN IPv4 Waitlist Monitor - Slack Alerts