---
title: "IPv4"
description: "1 posts about IPv4, summarised, each linking to the original."
---

# IPv4
> 1 posts about IPv4, summarised, each linking to the original.

## Articles

### [Anycast the easy way](https://yomu.fyi/post/anycast-the-easy-way.md)
- Company: [Fly.io](https://yomu.fyi/company/fly-io.md)
- Published: Mar 23, 2021
- Type: Explainer

Anycast lets an operator announce one IP block from multiple locations so routers connect users to a “nearest” location, but a basic setup requires address space and BGP announcements. The described path involves registering with a Regional Internet Registry, acquiring IPv4 through a broker or obtaining an IPv6 block, and checking purchased addresses for transfer eligibility and abuse-list history. It specifies minimum announcement sizes of an IPv4 /24 or IPv6 /48, notes a roughly $25-per-IPv4-address market rate, and estimates cloud holdings using published ranges. An ASN, available free from RIPE according to the text, groups prefixes and enables independent announcements, while BGP details, traffic direction, and failure scenarios are identified as harder areas left for later.