{
  "id": 10421250,
  "title": "I sampled 330 IPs from 11 VPS providers. Reverse DNS ranged from 0% to 100%, and the blocklist number needs unpacking.",
  "url": "https://urgent.news/2026/09/28/i-sampled-330-ips-from-11-vps-providers-reverse-dns-ranged-from-0-to",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-28T10:16:02.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/mazijuacc/i-sampled-330-ips-from-11-vps-providers-reverse-dns-ranged-from-0-to-100-and-the-blocklist-5cgd"
  },
  "original_language": "en",
  "account": "A researcher sampled IPv4 addresses from 11 VPS providers, finding that 163 of the 330 addresses (49.4%) had reverse DNS entries. The rate of reverse DNS varied by provider, ranging from 76.7% for RackNerd to 13.3% for Oracle Cloud. The majority of the reverse DNS entries belonged to a single list, dnsbl.spfbl.net, suggesting the list applies uniformly to the entire AS and not just individual hosts. Additionally, the reverse DNS names appeared to be under the control of the VPS providers, with some providers offering templated reverse DNS entries while others left it to the customer to set. The study also found that three different companies operated different names for the same IP addresses, indicating that the PTR name, the registrant, and the announcer can be distinct entities.",
  "summary": "After my last post on cloud provider IP ranges, a few people asked the obvious follow-up: what about the VPS companies you actually buy from? Fair. Those are the names people agonize over when picking a $20 box. So this round I changed the sample frame: instead of cloud providers' published ranges, I sampled the IPv4 space each provider's AS actually announces . 11 providers, 30 IPs each, 330…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}