Microsoft Azure

What it is

Microsoft's public service tags for Azure: every address range of every Azure service and region in one weekly JSON file. Microsoft renames the file each week, so the sync discovers the current name from the download page.

What it answers

In the IP response this source feeds is_datacenter, hosting_provider, connection_type. Every answer names the datasets it read in its sources block with the date each was synced, so the figure on this page and the one in an answer are the same figure.

curl https://spaw.co/api/v1/ip \
  -H "Authorization: Bearer $SPAW_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.9"}'

How to read this page

A source names a network or an operator, never a person. An address inside one of these ranges tells you what the connection is — a cloud instance, a VPN exit, a gateway, a listed host — and nothing about who is behind it.

This page is a reference about detection, not a mirror of the operator's list: it prints counts and dates, not addresses. The operator publishes the list itself, at the address above, and is the place to read it.

More sources in clouds and hosting

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• Every source
• Every field, documented
• Look up an address

counts and dates read from the installed feed · checked 2026-09-13