BGP Rehoming: Why an IPv4 Prefix Changes Origin ASN
Why an IPv4 prefix can change origin ASN without changing holder, and how to check BGP, RPKI, IRR and registry state.
The team’s articles
Articles
How the internet works
22 articles
APNIC explained: what it does, what it controls, and why it matters
A beginner’s guide to APNIC’s number resources, registry services, institutional limits, and Lu Heng’s case for accountable, replaceable Internet coordination.
Why Global Connectivity Is the Foundation of the Digital Economy
Explore how global connectivity powers the digital economy by driving innovation, digital inclusion, and sustainable growth worldwide.
The Role of RPKI In Strengthening Global Routing Security
RPKI can help networks reject unauthorized route origins. Follow the shared evidence, local decisions and operational dependencies that determine its real effect.
Why Network Operators Need Route Origin Authorization (ROA)
A ROA states which network may originate a route. Learn how to prepare it, check its effect and change networks without confusing a signed record with guaranteed delivery.
RPKI vs BGP security
BGP exchanges routes; RPKI supplies evidence for checking their origins. Understand what that check protects, what it leaves open, and who controls the evidence.
How Resource Public Key Infrastructure Works
Follow an RPKI authorisation from address holder to router, and understand Lu Heng’s case for keeping the service reliable and its administrator replaceable.
What Is RPKI? A Beginner’s Guide to Routing Security
How RPKI checks route origins, what its results mean, and why Lu Heng argues that reliable security also needs limits on registry power.
How ISPs Manage IP Allocation on a Large Scale
How an ISP connects address pools to customer service: allocation, routing, demand, sharing, retirement and the boundary between coordination and control.
What is a Public IP Address
Learn what a public IP address is, how it works, and why it’s essential for internet connectivity, online services, and secure communication.
Understanding IPv4 address structure and classes
Understand IPv4 prefixes through one /24 example, how it splits into /25 blocks, and why modern CIDR is more useful than guessing an address class.
How data travels across the internet: From your screen to the world
How packets move from your screen across physical networks, and why reliable records need replaceable coordination.