Reverse DNS: Everything You Need to Know
Reverse DNS (RDNS) maps IP addresses to hostnames using PTR records. Learn how reverse DNS works, and how ARIN manages delegations
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IPv4 Demand Stabilizes as Hyperscalers Slow Down Acquisition Activity
IPv4 market demand remains strong, with 153 transfers recorded in September, reflecting continued momentum even as hyperscalers begin to scale back their acquisition activity. This sustained level of transactions highlights the steady participation of mid-market buyers and service providers who continue to drive growth and stability across the IPv4 ecosystem.
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RPKI Explained – Resource Public Key Infrastructure
RPKI adds cryptographic trust to BGP, preventing hijacks and leaks. Learn how ROAs, validators, and routers keep routing secure.
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New ARIN Fees for 2026: How It Impacts IPv4 Holders
ARIN increases annual fees by 5% for 2026, maintains fee cap, and extends IPv6 waiver for 3X-Small organizations.
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What Are IPv4 Blocks?
IPv4 addresses are essential for internet communication, but limited availability is pushing the transition to IPv6 for future connectivity.
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Mitigating IP Address Abuse in IPv4 Transfer and Lease Markets
The hidden dangers of IP transfer abuse. How cybercriminals use IP addresses for malicious activities like spam, phishing, and malware.
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What is ARIN? North America’s Internet Registry
ARIN manages IP addresses and ASNs across North America, promoting IPv6 adoption and providing essential services for internet stability.
