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Bingbot publishes 28 IP ranges.

Last updated 5 Nov 2026 from Bingbot’s own list (file dated 2024-01-03T10:00:00.121331)

Short answer

Microsoft publishes the addresses Bingbot crawls from in bingbot.json; Bing Webmaster Tools also verifies a crawler by reverse DNS (search.msn.com).

IPv4 prefixes28
IPv6 prefixes0
Sub-listsNone
Provider’s file date2024-01-03T10:00:00.121331
Fetched by peekip5 Nov 2026
StatusFetched OK

What it’s for

Use it to tell the real Bingbot from scrapers that copy its user agent.

Prefixes

PrefixRegion / locationService
13.66.139.0/24—Bingbot
13.66.144.0/24—Bingbot
13.67.10.16/28—Bingbot
13.69.66.240/28—Bingbot
13.71.172.224/28—Bingbot
139.217.52.0/28—Bingbot
157.55.39.0/24—Bingbot
191.233.204.224/28—Bingbot
199.30.24.0/23—Bingbot
20.125.163.80/28—Bingbot
20.15.133.160/27—Bingbot
20.36.108.32/28—Bingbot
20.43.120.16/28—Bingbot
20.74.197.0/28—Bingbot
20.79.107.240/28—Bingbot
207.46.13.0/24—Bingbot
40.77.139.0/25—Bingbot
40.77.167.0/24—Bingbot
40.77.177.0/24—Bingbot
40.77.178.0/23—Bingbot
40.77.188.0/22—Bingbot
40.77.202.0/24—Bingbot
40.79.131.208/28—Bingbot
40.79.186.176/28—Bingbot
51.105.67.0/28—Bingbot
52.167.144.0/24—Bingbot
52.231.148.0/28—Bingbot
65.55.210.0/24—Bingbot
Showing 28 of 28 prefixes All prefixes (CSV)

What changed

No prefixes added or removed since we started tracking this list. Changes appear here the day after the provider publishes them.

Allowlist formats

nginx (first 5 prefixes)
allow 13.66.139.0/24;
allow 13.66.144.0/24;
allow 13.67.10.16/28;
allow 13.69.66.240/28;
allow 13.71.172.224/28;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 13.66.139.0/24 -j ACCEPT
iptables -A INPUT -s 13.66.144.0/24 -j ACCEPT
iptables -A INPUT -s 13.67.10.16/28 -j ACCEPT
iptables -A INPUT -s 13.69.66.240/28 -j ACCEPT
iptables -A INPUT -s 13.71.172.224/28 -j ACCEPT

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

Sources

  1. Bingbot: published IP ranges · checked 5 Nov 2026
  2. Bingbot documentation