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azure · Scuba

Microsoft Azure uses 267 prefixes for Scuba.

Last updated 4 Nov 2026 from Microsoft Azure’s own list (file dated 2026-11-02 (change 425))

Short answer

Microsoft Azure lists these prefixes under “Scuba”. Microsoft publishes Azure’s ranges weekly as Service Tags: named groups such as AzureCloud, Storage, Sql or AzureFrontDoor.Frontend, each a list of prefixes. We import the global (non-regional) tags.

IPv4 prefixes237
IPv6 prefixes30
Regions in the first 100—
Fetched by peekip4 Nov 2026

Prefixes

PrefixRegion / locationService
104.208.170.56/29—Scuba
104.208.180.140/30—Scuba
134.138.217.144/28—Scuba
134.138.217.160/27—Scuba
134.138.245.16/28—Scuba
134.138.83.8/29—Scuba
135.13.132.204/30—Scuba
135.13.132.208/31—Scuba
135.149.122.216/30—Scuba
135.149.122.220/31—Scuba
135.149.132.46/31—Scuba
135.149.132.56/30—Scuba
135.171.137.92/30—Scuba
135.171.138.48/28—Scuba
145.191.2.72/30—Scuba
145.191.2.76/31—Scuba
168.61.240.128/29—Scuba
172.129.96.192/29—Scuba
172.140.129.16/28—Scuba
172.147.5.16/28—Scuba
172.165.73.64/29—Scuba
172.165.73.72/30—Scuba
172.165.84.120/29—Scuba
172.165.84.144/28—Scuba
172.165.84.192/26—Scuba
172.170.16.0/25—Scuba
172.170.16.128/28—Scuba
172.170.19.152/29—Scuba
172.172.252.120/29—Scuba
172.172.255.128/29—Scuba
172.175.125.64/29—Scuba
172.175.178.128/28—Scuba
172.175.178.144/29—Scuba
172.175.178.152/30—Scuba
172.175.178.64/26—Scuba
172.186.55.236/30—Scuba
172.186.55.240/31—Scuba
172.187.71.68/30—Scuba
172.191.219.40/29—Scuba
172.192.184.180/31—Scuba
172.192.184.192/28—Scuba
172.194.82.248/29—Scuba
172.196.61.166/31—Scuba
172.197.132.152/29—Scuba
172.197.133.64/28—Scuba
172.198.98.184/29—Scuba
172.204.167.112/29—Scuba
172.204.242.56/30—Scuba
172.204.242.60/31—Scuba
172.209.192.254/31—Scuba
Showing 50 of 267 prefixes All prefixes (CSV)

What changed

  • 30 Oct 2026
    + 172.140.129.16/28
+ 172.147.5.16/28
+ 74.155.58.16/28
+ 74.159.251.144/28

Allowlist formats

nginx (first 5 prefixes)
allow 104.208.170.56/29;
allow 104.208.180.140/30;
allow 134.138.217.144/28;
allow 134.138.217.160/27;
allow 134.138.245.16/28;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 104.208.170.56/29 -j ACCEPT
iptables -A INPUT -s 104.208.180.140/30 -j ACCEPT
iptables -A INPUT -s 134.138.217.144/28 -j ACCEPT
iptables -A INPUT -s 134.138.217.160/27 -j ACCEPT
iptables -A INPUT -s 134.138.245.16/28 -j ACCEPT

Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.

Sources

  1. Microsoft Azure: published IP ranges · checked 4 Nov 2026
  2. Microsoft Azure documentation