How often do UptimeRobot IPs change?

Rarely, but they do change when UptimeRobot adds or replaces monitoring locations. UptimeRobot announces changes in advance and keeps the official text files up to date. Re-check the list every few months or automate a sync against the official files.

What user agent does UptimeRobot use?

UptimeRobot requests contain "UptimeRobot/2.0" in the user agent string. You can combine IP whitelisting with a user-agent rule for defense in depth, but never rely on the user agent alone — it is trivially spoofable.

Does UptimeRobot support IPv6?

Yes. UptimeRobot publishes both IPv4 and IPv6 address lists. If your server is reachable over IPv6, whitelist both lists.

What happens if I do not whitelist these IPs?

Firewalls, WAFs (e.g. Cloudflare rules), and rate limiters may challenge or block probe requests. The result is false "down" alerts or inflated response times — your monitoring becomes noise instead of signal.

Should I whitelist these IPs on my origin server or my CDN/WAF?

Both — wherever requests can be blocked. If your site sits behind a CDN or WAF (Cloudflare, AWS WAF, Akamai…), add an allow/skip rule there so probes are never challenged; if your origin firewall also filters traffic, whitelist them there too. A single missed layer is enough to cause false alerts.

How do I keep this whitelist up to date automatically?

Most providers expose a machine-readable source (linked above). Fetch it on a schedule — a small cron job that pulls the list and updates your firewall ruleset — instead of hardcoding addresses by hand. This page is re-verified against the official source regularly, but automation on your side is the most reliable option.

Does whitelisting these IPs make my site less secure?

No. Allow-listing only exempts known monitoring addresses from blocking and rate-limiting rules — it grants no access beyond what your site already serves publicly, and authentication, authorization, and TLS are unchanged. You are simply telling your firewall "these are not attackers".

What is the difference between whitelisting and blocking here?

A blocklist keeps known-bad addresses out; an allow/whitelist makes sure known-good addresses — here, the monitoring probes — never end up caught in a block or rate-limit rule. The two coexist: you keep blocking attackers while explicitly exempting the probes.

UptimeRobot: IPs & Locations

Verified UptimeRobot IP Addresses. Copy-Paste Firewall-Setups.

Every official UptimeRobot monitoring IP—verified in real-time against the canonical source, featuring ready-to-use firewall templates. Stop false downtime alerts caused by blocked checking nodes on your infrastructure.

Start Free Trial Uptimeify IP-List

Three-Step Activation & Frictionless Firewall Alignment

Bring your perimeter security rules up to date in three simple steps. Our production-ready configuration templates for common server architectures eliminate fragmented routing filters and costly check flapping.

Copy Complete IP Bundles

116 IPv4 and 116 IPv6 addresses — one click below copies everything as a plain list or as ready-to-paste UFW, nginx, or Apache config.

Authorize Firewall & WAF Layers

Add every address to your allow list — UFW, nginx, Apache, or a Cloudflare/WAF skip rule. Partial lists cause flapping checks and false alerts.

Re-Sync Periodically

UptimeRobot updates its list occasionally. This page was verified on 2026-06-12 against the official source — re-check after unexplained alerts or automate the sync.

Official UptimeRobot monitoring IPs

UptimeRobot publishes machine-readable lists at uptimerobot.com/inc/files/ips/IPv4.txt and IPv6.txt.

UptimeRobot is one of the most widely used uptime monitoring services. Its probes check your website from a fleet of monitoring servers — if your firewall, WAF, or rate limiter blocks those probes, UptimeRobot will report false downtime even though your site is fine for real visitors.

To make sure monitoring traffic is never blocked, whitelist (allow-list) all of UptimeRobot's official monitoring IP addresses below. The requests identify themselves with a user agent containing UptimeRobot/2.0.

This list contains 116 IPv4 and 116 IPv6 addresses, verified against the official source on 2026-06-12.

IPv4 addresses 116

3.12.251.153
3.20.63.178
3.77.67.4
3.79.134.69
3.105.133.239
3.105.190.221
3.133.226.214
3.149.57.90
3.212.128.62
5.161.61.238
5.161.73.160
5.161.75.7
5.161.113.195
5.161.117.52
5.161.177.47
5.161.194.92
5.161.215.244
5.223.43.32
5.223.53.147
5.223.57.22
18.116.205.62
18.180.208.214
18.192.166.72
18.193.252.127
24.144.78.39
24.144.78.185
34.198.201.66
45.55.123.175
45.55.127.146
49.13.24.81
49.13.130.29
49.13.134.145
49.13.164.148
49.13.167.123
52.15.147.27
52.22.236.30
52.28.162.93
52.59.43.236
52.87.72.16
54.64.67.106
54.79.28.129
54.87.112.51
54.167.223.174
54.249.170.27
63.178.84.147
64.225.81.248
64.225.82.147
69.162.124.227
69.162.124.235
69.162.124.238
78.46.190.63
78.46.215.1
78.47.98.55
78.47.173.76
88.99.80.227
91.99.101.207
128.140.41.193
128.140.106.114
129.212.132.140
134.199.240.137
138.197.53.117
138.197.53.138
138.197.54.143
138.197.54.247
138.197.63.92
139.59.50.44
142.132.180.39
143.198.249.237
143.198.250.89
143.244.196.21
143.244.196.211
143.244.221.177
144.126.251.21
146.190.9.187
152.42.149.135
157.90.155.240
157.90.156.63
159.69.158.189
159.223.243.219
161.35.247.201
167.99.18.52
167.235.143.113
168.119.53.160
168.119.96.239
168.119.123.75
170.64.250.64
170.64.250.132
170.64.250.235
178.156.181.172
178.156.184.20
178.156.185.127
178.156.185.231
178.156.187.238
178.156.189.113
178.156.189.249
188.166.201.79
206.189.241.133
209.38.49.1
209.38.49.206
209.38.49.226
209.38.51.43
209.38.53.7
209.38.124.252
216.144.248.18
216.144.248.19
216.144.248.21
216.144.248.22
216.144.248.23
216.144.248.24
216.144.248.25
216.144.248.26
216.144.248.27
216.144.248.28
216.144.248.29
216.144.248.30
216.245.221.83

IPv6 addresses 116

2a01:4f8:1c1a:3d53::1
2a01:4f8:1c1b:4ef4::1
2a01:4f8:1c1b:5b5a::1
2a01:4f8:1c1b:7ecc::1
2a01:4f8:1c1c:11aa::1
2a01:4f8:1c1c:5353::1
2a01:4f8:1c1c:7240::1
2a01:4f8:1c1c:a98a::1
2a01:4f8:c0c:83fa::1
2a01:4f8:c2c:9fc6::1
2a01:4f8:c2c:beae::1
2a01:4f8:c012:c60e::1
2a01:4f8:c013:3b0f::1
2a01:4f8:c013:3c52::1
2a01:4f8:c013:3c53::1
2a01:4f8:c013:3c54::1
2a01:4f8:c013:3c55::1
2a01:4f8:c013:3c56::1
2a01:4f8:c013:34c0::1
2a01:4f8:c013:c18::1
2a01:4f8:c17:42e4::1
2a01:4ff:2f0:3b3a::1
2a01:4ff:2f0:27de::1
2a01:4ff:2f0:193c::1
2a01:4ff:f0:3e03::1
2a01:4ff:f0:5f80::1
2a01:4ff:f0:7fad::1
2a01:4ff:f0:9c5f::1
2a01:4ff:f0:2219::1
2a01:4ff:f0:b2f2::1
2a01:4ff:f0:b6f1::1
2a01:4ff:f0:bfd::1
2a01:4ff:f0:d3cd::1
2a01:4ff:f0:d283::1
2a01:4ff:f0:e9cf::1
2a01:4ff:f0:e516::1
2a01:4ff:f0:eccb::1
2a01:4ff:f0:efd1::1
2a01:4ff:f0:fdc7::1
2a03:b0c0:2:f0::bd91:f001
2a03:b0c0:2:f0::bd92:1
2a03:b0c0:2:f0::bd92:1001
2a03:b0c0:2:f0::bd92:2001
2a03:b0c0:2:f0::bd92:4001
2a03:b0c0:2:f0::bd92:5001
2a03:b0c0:2:f0::bd92:6001
2a03:b0c0:2:f0::bd92:7001
2a03:b0c0:2:f0::bd92:8001
2a03:b0c0:2:f0::bd92:9001
2a03:b0c0:2:f0::bd92:a001
2a03:b0c0:2:f0::bd92:b001
2a03:b0c0:2:f0::bd92:c001
2a03:b0c0:2:f0::bd92:e001
2a03:b0c0:2:f0::bd92:f001
2a05:d014:1815:3400:6d:9235:c1c0:96ad
2a05:d014:1815:3400:90b4:4ef9:5631:b170
2a05:d014:1815:3400:654f:bd37:724c:212b
2a05:d014:1815:3400:9779:d8e9:100a:9642
2a05:d014:1815:3400:af29:e95e:64ff:df81
2a05:d014:1815:3400:c7d6:f7f3:6cc1:30d1
2a05:d014:1815:3400:d784:e5dd:8e0:67cb
2400:6180:10:200::56a0:b000
2400:6180:10:200::56a0:c000
2400:6180:10:200::56a0:e000
2400:6180:100:d0::94b6:4001
2400:6180:100:d0::94b6:5001
2400:6180:100:d0::94b6:7001
2406:da1c:9c8:dc02:7ae1:f2ea:ab91:2fde
2406:da1c:9c8:dc02:7db9:f38b:7b9f:402e
2406:da1c:9c8:dc02:82b2:f0fd:ee96:579
2406:da14:94d:8601:9d0d:7754:bedf:e4f5
2406:da14:94d:8601:b325:ff58:2bba:7934
2406:da14:94d:8601:db4b:c5ac:2cbe:9a79
2600:1f16:775:3a00:3f24:5bb0:95d7:5a6b
2600:1f16:775:3a00:8c2c:2ba6:778f:5be5
2600:1f16:775:3a00:37bf:6026:e54a:f03a
2600:1f16:775:3a00:91ac:3120:ff38:92b5
2600:1f16:775:3a00:ac3:c5eb:7081:942e
2600:1f16:775:3a00:dbbe:36b0:3c45:da32
2600:1f18:179:f900:4b7d:d1cc:2d10:211
2600:1f18:179:f900:5c68:91b6:5d75:5d7
2600:1f18:179:f900:71:af9a:ade7:d772
2600:1f18:179:f900:2406:9399:4ae6:c5d3
2600:1f18:179:f900:4696:7729:7bb3:f52f
2600:1f18:179:f900:e8dd:eed1:a6c:183b
2604:a880:800:14:0:1:68ba:d000
2604:a880:800:14:0:1:68ba:e000
2604:a880:800:14:0:1:68bb:0
2604:a880:800:14:0:1:68bb:1000
2604:a880:800:14:0:1:68bb:3000
2604:a880:800:14:0:1:68bb:4000
2604:a880:800:14:0:1:68bb:5000
2604:a880:800:14:0:1:68bb:6000
2604:a880:800:14:0:1:68bb:7000
2604:a880:800:14:0:1:68bb:a000
2604:a880:800:14:0:1:68bb:b000
2604:a880:800:14:0:1:68bb:c000
2604:a880:800:14:0:1:68bb:d000
2604:a880:800:14:0:1:68bb:e000
2604:a880:800:14:0:1:68bb:f000
2607:ff68:107::4
2607:ff68:107::14
2607:ff68:107::33
2607:ff68:107::48
2607:ff68:107::49
2607:ff68:107::50
2607:ff68:107::51
2607:ff68:107::52
2607:ff68:107::53
2607:ff68:107::54
2607:ff68:107::55
2607:ff68:107::56
2607:ff68:107::57
2607:ff68:107::58
2607:ff68:107::59
2607:ff68:107::60

Last verified: 2026-06-12

Official source: https://uptimerobot.com/help/locations/

Whitelisting UptimeRobot-Monitoring IPs

Pick a format — the block below contains the complete config for every address in the list above. The plain list is also available as a .txt download.

ufw allow from 3.12.251.153
ufw allow from 3.20.63.178
ufw allow from 3.77.67.4
ufw allow from 3.79.134.69
ufw allow from 3.105.133.239
ufw allow from 3.105.190.221
ufw allow from 3.133.226.214
ufw allow from 3.149.57.90
ufw allow from 3.212.128.62
ufw allow from 5.161.61.238
ufw allow from 5.161.73.160
ufw allow from 5.161.75.7
ufw allow from 5.161.113.195
ufw allow from 5.161.117.52
ufw allow from 5.161.177.47
ufw allow from 5.161.194.92
ufw allow from 5.161.215.244
ufw allow from 5.223.43.32
ufw allow from 5.223.53.147
ufw allow from 5.223.57.22
ufw allow from 18.116.205.62
ufw allow from 18.180.208.214
ufw allow from 18.192.166.72
ufw allow from 18.193.252.127
ufw allow from 24.144.78.39
ufw allow from 24.144.78.185
ufw allow from 34.198.201.66
ufw allow from 45.55.123.175
ufw allow from 45.55.127.146
ufw allow from 49.13.24.81
ufw allow from 49.13.130.29
ufw allow from 49.13.134.145
ufw allow from 49.13.164.148
ufw allow from 49.13.167.123
ufw allow from 52.15.147.27
ufw allow from 52.22.236.30
ufw allow from 52.28.162.93
ufw allow from 52.59.43.236
ufw allow from 52.87.72.16
ufw allow from 54.64.67.106
ufw allow from 54.79.28.129
ufw allow from 54.87.112.51
ufw allow from 54.167.223.174
ufw allow from 54.249.170.27
ufw allow from 63.178.84.147
ufw allow from 64.225.81.248
ufw allow from 64.225.82.147
ufw allow from 69.162.124.227
ufw allow from 69.162.124.235
ufw allow from 69.162.124.238
ufw allow from 78.46.190.63
ufw allow from 78.46.215.1
ufw allow from 78.47.98.55
ufw allow from 78.47.173.76
ufw allow from 88.99.80.227
ufw allow from 91.99.101.207
ufw allow from 128.140.41.193
ufw allow from 128.140.106.114
ufw allow from 129.212.132.140
ufw allow from 134.199.240.137
ufw allow from 138.197.53.117
ufw allow from 138.197.53.138
ufw allow from 138.197.54.143
ufw allow from 138.197.54.247
ufw allow from 138.197.63.92
ufw allow from 139.59.50.44
ufw allow from 142.132.180.39
ufw allow from 143.198.249.237
ufw allow from 143.198.250.89
ufw allow from 143.244.196.21
ufw allow from 143.244.196.211
ufw allow from 143.244.221.177
ufw allow from 144.126.251.21
ufw allow from 146.190.9.187
ufw allow from 152.42.149.135
ufw allow from 157.90.155.240
ufw allow from 157.90.156.63
ufw allow from 159.69.158.189
ufw allow from 159.223.243.219
ufw allow from 161.35.247.201
ufw allow from 167.99.18.52
ufw allow from 167.235.143.113
ufw allow from 168.119.53.160
ufw allow from 168.119.96.239
ufw allow from 168.119.123.75
ufw allow from 170.64.250.64
ufw allow from 170.64.250.132
ufw allow from 170.64.250.235
ufw allow from 178.156.181.172
ufw allow from 178.156.184.20
ufw allow from 178.156.185.127
ufw allow from 178.156.185.231
ufw allow from 178.156.187.238
ufw allow from 178.156.189.113
ufw allow from 178.156.189.249
ufw allow from 188.166.201.79
ufw allow from 206.189.241.133
ufw allow from 209.38.49.1
ufw allow from 209.38.49.206
ufw allow from 209.38.49.226
ufw allow from 209.38.51.43
ufw allow from 209.38.53.7
ufw allow from 209.38.124.252
ufw allow from 216.144.248.18
ufw allow from 216.144.248.19
ufw allow from 216.144.248.21
ufw allow from 216.144.248.22
ufw allow from 216.144.248.23
ufw allow from 216.144.248.24
ufw allow from 216.144.248.25
ufw allow from 216.144.248.26
ufw allow from 216.144.248.27
ufw allow from 216.144.248.28
ufw allow from 216.144.248.29
ufw allow from 216.144.248.30
ufw allow from 216.245.221.83
ufw allow from 2a01:4f8:1c1a:3d53::1
ufw allow from 2a01:4f8:1c1b:4ef4::1
ufw allow from 2a01:4f8:1c1b:5b5a::1
ufw allow from 2a01:4f8:1c1b:7ecc::1
ufw allow from 2a01:4f8:1c1c:11aa::1
ufw allow from 2a01:4f8:1c1c:5353::1
ufw allow from 2a01:4f8:1c1c:7240::1
ufw allow from 2a01:4f8:1c1c:a98a::1
ufw allow from 2a01:4f8:c0c:83fa::1
ufw allow from 2a01:4f8:c2c:9fc6::1
ufw allow from 2a01:4f8:c2c:beae::1
ufw allow from 2a01:4f8:c012:c60e::1
ufw allow from 2a01:4f8:c013:3b0f::1
ufw allow from 2a01:4f8:c013:3c52::1
ufw allow from 2a01:4f8:c013:3c53::1
ufw allow from 2a01:4f8:c013:3c54::1
ufw allow from 2a01:4f8:c013:3c55::1
ufw allow from 2a01:4f8:c013:3c56::1
ufw allow from 2a01:4f8:c013:34c0::1
ufw allow from 2a01:4f8:c013:c18::1
ufw allow from 2a01:4f8:c17:42e4::1
ufw allow from 2a01:4ff:2f0:3b3a::1
ufw allow from 2a01:4ff:2f0:27de::1
ufw allow from 2a01:4ff:2f0:193c::1
ufw allow from 2a01:4ff:f0:3e03::1
ufw allow from 2a01:4ff:f0:5f80::1
ufw allow from 2a01:4ff:f0:7fad::1
ufw allow from 2a01:4ff:f0:9c5f::1
ufw allow from 2a01:4ff:f0:2219::1
ufw allow from 2a01:4ff:f0:b2f2::1
ufw allow from 2a01:4ff:f0:b6f1::1
ufw allow from 2a01:4ff:f0:bfd::1
ufw allow from 2a01:4ff:f0:d3cd::1
ufw allow from 2a01:4ff:f0:d283::1
ufw allow from 2a01:4ff:f0:e9cf::1
ufw allow from 2a01:4ff:f0:e516::1
ufw allow from 2a01:4ff:f0:eccb::1
ufw allow from 2a01:4ff:f0:efd1::1
ufw allow from 2a01:4ff:f0:fdc7::1
ufw allow from 2a03:b0c0:2:f0::bd91:f001
ufw allow from 2a03:b0c0:2:f0::bd92:1
ufw allow from 2a03:b0c0:2:f0::bd92:1001
ufw allow from 2a03:b0c0:2:f0::bd92:2001
ufw allow from 2a03:b0c0:2:f0::bd92:4001
ufw allow from 2a03:b0c0:2:f0::bd92:5001
ufw allow from 2a03:b0c0:2:f0::bd92:6001
ufw allow from 2a03:b0c0:2:f0::bd92:7001
ufw allow from 2a03:b0c0:2:f0::bd92:8001
ufw allow from 2a03:b0c0:2:f0::bd92:9001
ufw allow from 2a03:b0c0:2:f0::bd92:a001
ufw allow from 2a03:b0c0:2:f0::bd92:b001
ufw allow from 2a03:b0c0:2:f0::bd92:c001
ufw allow from 2a03:b0c0:2:f0::bd92:e001
ufw allow from 2a03:b0c0:2:f0::bd92:f001
ufw allow from 2a05:d014:1815:3400:6d:9235:c1c0:96ad
ufw allow from 2a05:d014:1815:3400:90b4:4ef9:5631:b170
ufw allow from 2a05:d014:1815:3400:654f:bd37:724c:212b
ufw allow from 2a05:d014:1815:3400:9779:d8e9:100a:9642
ufw allow from 2a05:d014:1815:3400:af29:e95e:64ff:df81
ufw allow from 2a05:d014:1815:3400:c7d6:f7f3:6cc1:30d1
ufw allow from 2a05:d014:1815:3400:d784:e5dd:8e0:67cb
ufw allow from 2400:6180:10:200::56a0:b000
ufw allow from 2400:6180:10:200::56a0:c000
ufw allow from 2400:6180:10:200::56a0:e000
ufw allow from 2400:6180:100:d0::94b6:4001
ufw allow from 2400:6180:100:d0::94b6:5001
ufw allow from 2400:6180:100:d0::94b6:7001
ufw allow from 2406:da1c:9c8:dc02:7ae1:f2ea:ab91:2fde
ufw allow from 2406:da1c:9c8:dc02:7db9:f38b:7b9f:402e
ufw allow from 2406:da1c:9c8:dc02:82b2:f0fd:ee96:579
ufw allow from 2406:da14:94d:8601:9d0d:7754:bedf:e4f5
ufw allow from 2406:da14:94d:8601:b325:ff58:2bba:7934
ufw allow from 2406:da14:94d:8601:db4b:c5ac:2cbe:9a79
ufw allow from 2600:1f16:775:3a00:3f24:5bb0:95d7:5a6b
ufw allow from 2600:1f16:775:3a00:8c2c:2ba6:778f:5be5
ufw allow from 2600:1f16:775:3a00:37bf:6026:e54a:f03a
ufw allow from 2600:1f16:775:3a00:91ac:3120:ff38:92b5
ufw allow from 2600:1f16:775:3a00:ac3:c5eb:7081:942e
ufw allow from 2600:1f16:775:3a00:dbbe:36b0:3c45:da32
ufw allow from 2600:1f18:179:f900:4b7d:d1cc:2d10:211
ufw allow from 2600:1f18:179:f900:5c68:91b6:5d75:5d7
ufw allow from 2600:1f18:179:f900:71:af9a:ade7:d772
ufw allow from 2600:1f18:179:f900:2406:9399:4ae6:c5d3
ufw allow from 2600:1f18:179:f900:4696:7729:7bb3:f52f
ufw allow from 2600:1f18:179:f900:e8dd:eed1:a6c:183b
ufw allow from 2604:a880:800:14:0:1:68ba:d000
ufw allow from 2604:a880:800:14:0:1:68ba:e000
ufw allow from 2604:a880:800:14:0:1:68bb:0
ufw allow from 2604:a880:800:14:0:1:68bb:1000
ufw allow from 2604:a880:800:14:0:1:68bb:3000
ufw allow from 2604:a880:800:14:0:1:68bb:4000
ufw allow from 2604:a880:800:14:0:1:68bb:5000
ufw allow from 2604:a880:800:14:0:1:68bb:6000
ufw allow from 2604:a880:800:14:0:1:68bb:7000
ufw allow from 2604:a880:800:14:0:1:68bb:a000
ufw allow from 2604:a880:800:14:0:1:68bb:b000
ufw allow from 2604:a880:800:14:0:1:68bb:c000
ufw allow from 2604:a880:800:14:0:1:68bb:d000
ufw allow from 2604:a880:800:14:0:1:68bb:e000
ufw allow from 2604:a880:800:14:0:1:68bb:f000
ufw allow from 2607:ff68:107::4
ufw allow from 2607:ff68:107::14
ufw allow from 2607:ff68:107::33
ufw allow from 2607:ff68:107::48
ufw allow from 2607:ff68:107::49
ufw allow from 2607:ff68:107::50
ufw allow from 2607:ff68:107::51
ufw allow from 2607:ff68:107::52
ufw allow from 2607:ff68:107::53
ufw allow from 2607:ff68:107::54
ufw allow from 2607:ff68:107::55
ufw allow from 2607:ff68:107::56
ufw allow from 2607:ff68:107::57
ufw allow from 2607:ff68:107::58
ufw allow from 2607:ff68:107::59
ufw allow from 2607:ff68:107::60

Cloudflare / WAF: create an IP Access Rule (or custom WAF skip rule) with action Allow for the addresses above, so bot fight mode and managed challenges never block probe traffic.

Whitelisting only exempts these addresses from blocking and rate-limiting rules — it grants no access beyond what your site already serves publicly.

FAQ

Frequently Asked Questions

The IP addresses on this page belong to UptimeRobot and are published by UptimeRobot for whitelisting purposes. List verified on 2026-06-12 against the official source. Always cross-check with the official documentation before locking down production firewalls. All product names and trademarks are the property of their respective owners; Uptimeify is not affiliated with UptimeRobot. Uptimeify's own worker IPs are published at /ips.txt; a feature comparison is on our comparison page.

Monitoring without IP guesswork.

Protect your clients' digital assets and lock down your webserver routing. Leverage our verified network catalogs for clean whitelist setups, or migrate directly to the rock-solid, EU-only architecture of Uptimeify.

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