179 probes · 69 countries · 6 continents

Monitoring checkpoints in 69 countries.

Every checkpoint below is a machine we run, at an address you can allowlist. Choose any of them per monitor — 6 at a minimum.

44 North America 90 Europe 7 South America 23 Asia 7 Oceania 5 Middle East 3 Africa
Every IP published for allowlisting IPv6 on 91 checkpoints Any checkpoint, on any plan
The fleet

Where your checks come from

179 probes across 6 continents. A failure at one of them is re-tested from up to 3 others before any alert leaves the system.

North America
44 checkpoints
Europe
90 checkpoints
Africa
3 checkpoints
South America
7 checkpoints
Asia
23 checkpoints
Middle East
5 checkpoints
Oceania
7 checkpoints
North America
44 checkpoints
South America
7 checkpoints
Africa
3 checkpoints
Europe
90 checkpoints
Oceania
7 checkpoints
Asia
23 checkpoints
Probes & IPs

Allowlist files that stay current

We run this many locations to keep a probe near your users, and near the networks they reach you over. Both files below are generated from the same list this page renders, so a firewall that only trusts our checkpoints keeps trusting them after we add or re-address one.

Every checkpoint IP, one per line — or the same list in nginx geo/map syntax, ready to include.

North America

44 probes 3 countries
Country City IPv4 address IPv6 address
United States San Francisco (CA) 137.184.94.36 —
Fremont (CA) 45.56.89.150 2600:3c01::f03c:93ff:fe97:7775
New York City (NY) 74.119.194.122 —
Dallas (TX) 209.145.48.145 —
Orlando (FL) 202.78.170.252 2a03:90c0:514:2905::699
Atlanta (GA) 155.138.203.9 2001:19f0:5401:82b:5400:3ff:fef1:d578
Austin (TX) 208.81.246.2 —
Boston (MA) 192.34.85.32 —
Chicago (IL) 154.12.235.24 —
Denver (CO) 192.73.242.94 —
Honolulu (HI) 208.72.155.80 2001:19f0:c000:c41f:5400:3ff:fef3:9dc
Houston (TX) 216.230.231.22 —
Las Vegas (NV) 5.226.169.22 —
Los Angeles (CA) 149.248.7.54 2001:19f0:6001:bf:5400:3ff:fef1:d58c
Miami (FL) 45.77.166.217 2001:19f0:9002:1670:5400:3ff:fef3:a1a
Newark (DE) 64.115.146.31 —
Phoenix (AZ) 184.95.56.23 —
Portland (OR) 45.76.247.38 2001:19f0:8001:1063:5400:4ff:fe1a:ed65
Sacramento (CA) 208.17.90.75 —
San Diego (CA) 92.223.30.35 2a03:90c0:1a5::b2
Seattle (WA) 154.53.63.67 —
Tampa (FL) 162.252.175.30 2605:3b80:11:4180::1
Washington D.C. 205.143.207.95 —
New Jersey (NJ) 207.246.87.204 2001:19f0:5:60c0:5400:3ff:fef1:eda6
Ashburn (VA) 45.82.161.53 2a03:90c0:295::141
Marietta (GA) 31.13.213.16 2a03:90c0:215::5a
Detroit (MI) 162.247.76.194 —
Philadelphia (PA) 65.79.190.94 —
Santa Clara (CA) 92.38.149.41 —
Silicon Valley (CA) 45.32.139.74 2001:19f0:ac01:6a1:5400:3ff:fef1:ed87
Hartford (CT) 159.247.33.53 —
Naperville (IL) 2.56.222.31 2a03:90c0:133:2903::c9
Indianapolis (IN) 168.214.152.25 —
Milwaukee (WI) 137.220.57.16 2001:19f0:5c00:1909:5400:4ff:fe1a:ecc2
Baltimore (MD) 162.255.162.52 —
Fort Worth (TX) 155.138.241.31 2001:19f0:6401:d29:5400:4ff:fe1a:ed16
Cleveland (OH) 65.25.83.5 —
Salt Lake City (UT) 155.97.137.59 —
Canada Toronto 158.69.124.159 2607:5300:60:919f::
Montreal 158.69.63.98 2607:5300:201:3100::46eb
Vancouver 192.71.227.46 2605:3b80:cad:1a86::1
Toronto #2 85.208.108.19 —
Mexico Mexico City 216.238.71.251 2001:19f0:b400:118c:5400:3ff:fef1:d5c5
Santiago de Querétaro 89.223.88.11 2a03:90c0:545::a

Europe

90 probes 39 countries
Country City IPv4 address IPv6 address
Austria Vienna 85.208.109.132 —
Graz 185.26.237.160 2a03:f80:ed31:8878::1
Belgium Brussels 192.71.249.132 2a03:f80:32:ee3a::1
Antwerpen 95.164.62.8 2a12:6500:0:5::1
Gent 176.62.160.65 —
Bulgaria Sofia 188.211.166.62 2a03:f80:359:b2c4::1
Denmark Aarhus 93.160.88.253 —
Odense 95.164.10.36 2a13:6300:0:1a::1
Copenhagen 192.36.27.88 2a03:f80:45:231a::1
Finland Helsinki 89.40.105.99 2a03:f80:358:f149::1
United Kingdom London 145.239.6.120 2001:41d0:800:278::1/128
London #2 51.75.170.220 —
Edinburgh 194.63.145.165 2a09:cd40:f:43b3::1
Glasgow 78.141.198.130 2001:19f0:7402:1512:5400:3ff:fefc:2448
Manchester 95.164.37.131 —
Canary Wharf 91.132.95.21 2a03:f80:4416:6e7c::1
Portsmouth 149.102.128.13 —
Sheffield 37.61.229.225 2a03:90c0:146::2012
Bristol 178.128.45.12 —
Germany Berlin 94.176.182.125 2a05:8280:f:4399::1
Frankfurt 94.131.111.229 —
Bremen 82.198.223.25 —
Cologne 51.68.180.180 2001:41d0:700:1bb4::
Düsseldorf 194.163.128.65 —
Hamburg 212.53.132.25 —
Leipzig 78.46.1.53 —
Munich 80.190.158.99 —
Nuremberg 54.38.158.248 2001:41d0:701:1100::a87
Falkenstein 188.40.52.12 —
Dresden 89.15.2.21 —
Erfurt 62.157.212.26 —
Stuttgart 149.154.159.228 2a03:f80:49:a5dc::1
Greece Athens 212.52.16.9 2a03:f80:30:1667::1
Ukraine Kyiv 91.239.65.45 2a03:90c0:277::1c1
Hungary Budapest 5.181.77.92 2a03:90c0:395::fa
Ireland Dublin 193.57.138.47 —
Luxembourg Luxembourg 45.12.144.56 —
Netherlands Amsterdam 93.115.18.6 2a0c:b9c0:f:4413::1
Haarlem 78.141.214.15 2001:19f0:5001:d74:5400:4ff:fe30:bd7b
Rotterdam 151.236.14.167 2a03:f80:31:91dd::1
Utrecht 45.12.145.125 —
Norway Bjerke 95.164.84.180 —
Oslo 194.68.32.40 2a03:f80:47:771b::1
Poland Warsaw 51.77.42.80 2001:41d0:602:2e4::
Poznan 151.236.25.95 2a03:f80:48:c6::1
Łódź 77.91.102.45 2a09:7c40:0:13::1
Kraków 37.235.48.147 2a03:f80:48:be01::1
Portugal Lisbon 5.182.39.59 —
Porto 80.251.169.141 —
Romania Bucharest 45.82.102.118 2a03:90c0:4c0:2903:ffff::329
Russia Moscow 213.111.187.87 2a03:f80:7:187b::1
Saint Petersburg 192.121.171.45 2a03:f80:70:bb7c::1
Moscow #2 103.136.43.179 —
Moscow #3 38.60.218.244 —
Slovakia Bratislava 5.180.55.83 2a13:6303:0:2::1
Slovenia Ljubljana 45.83.131.192 —
Lithuania Vilnius 45.12.129.189 —
Latvia Riga 45.133.216.239 2a09:7c43:0:5::1
Estonia Tallinn 89.40.104.2 2a03:f80:372:a85e::1
Croatia Zagreb 45.136.129.139 —
Spain Barcelona 45.12.150.216 —
Madrid 193.24.235.48 2a09:cd45:1:87a4::1
Seville 37.235.53.104 2a00:1d70:ed15:297f::1
France Strasbourg 152.228.133.230 2001:41d0:404:200::81f4
Paris 185.170.214.187 —
Lyon 158.255.215.105 2a03:f80:33:d863::1
Marseille 94.232.247.26 2a0b:cf47:0:76::1
Roubaix 51.255.95.82 2001:41d0:1004:2552::
Gravelines 162.19.66.220 2001:41d0:304:200::33eb
Italy Rome 5.253.43.131 —
Milan 89.41.172.28 2a03:90c0:1b5:ffff::cd:1
Bologna 5.90.1.4 —
Turin 5.89.17.34 —
Czech Republic Prague 185.122.186.154 2a03:f80:420:54ca::1
Sweden Stockholm 185.243.215.192 —
Malmö 70.34.204.185 2a05:f480:2000:231d:5400:4ff:fe5a:925c
Göteborg 178.73.210.249 2a00:1a28:1251:b2da::1
Uppsala 37.221.126.154 2a11:3802:0:b::1
Switzerland Bern 159.144.158.96 —
Geneva 5.182.36.206 2a11:4c03:0:f::1
Zurich 178.209.50.220 2a02:418:6a04:629d::1
Turkey Istanbul 103.215.218.239 2a03:90c0:166:174::1
Moldova Chisinau 45.153.124.189 2a03:f80:373:a99d::1
North Macedonia Skopje 45.83.141.47 —
Albania Tirana 45.15.170.104 2a14:3084::2e0
Serbia Belgrade 45.15.160.219 —
Liechtenstein Vaduz 45.15.167.46 —
Iceland Reykjavik 45.83.21.49 —
Armenia Yerevan 93.115.240.174 2a03:90c0:5f1:2903::11f1
Bosnia and Herzegovina Sarajevo 45.8.147.28 2a11:3803::12a

South America

7 probes 5 countries
Country City IPv4 address IPv6 address
Argentina Buenos Aires 200.42.136.21 —
Brazil Brasília 45.82.245.126 —
Sao Paolo 216.238.110.248 2001:19f0:b800:183a:5400:3ff:fef1:847a
Fortaleza 5.252.24.165 2a03:90c0:525::142
Chile Santiago 45.82.249.41 2a14:3086::15a
Peru Lima 87.121.99.218 2a03:90c0:555::662
Panama Panama City 186.72.79.24 —

Asia

23 probes 13 countries
Country City IPv4 address IPv6 address
Japan Tokyo 45.77.178.221 —
Nagoya 155.133.7.23 —
Osaka 64.176.38.5 2401:c080:3800:2e89:5400:4ff:fe4d:6457
Sapporo 103.19.2.131 —
Singapore Singapore 51.79.240.138 2402:1f00:8000:800::281a
Singapore #2 194.233.94.210 —
China Beijing 39.105.113.253 —
Shanghai 43.240.124.23 —
Shenzen 158.255.208.25 2a03:f80:852:a0b1::1
Kazakhstan Almaty 89.44.193.116 —
Astana 94.131.2.254 —
Vietnam Hanoi 38.54.30.93 —
Hong Kong Hong Kong 89.223.95.88 2a03:90c0:2c8::211
India Chennai 14.139.160.70 —
Bengalore 128.199.17.77 —
Mumbai 65.20.67.148 2401:c080:2400:1268:5400:3ff:fef1:d5af
New Delhi 45.89.106.119 —
Indonesia Jakarta 38.60.191.155 —
South Korea Seoul 158.247.203.244 —
Malaysia Kuala Lumpur 45.128.54.38 2a14:3087::8d2
Philippines Manila 38.54.36.13 —
Taiwan Taipei 38.54.107.219 —
Thailand Bangkok 38.54.33.193 —

Oceania

7 probes 2 countries
Country City IPv4 address IPv6 address
Australia Sydney 139.99.236.25 2402:1f00:8100:400::1996
Adelaide 146.185.214.151 2a03:90c0:105::55
Brisbane 172.105.180.165 2400:8907::f03c:93ff:fecb:6104
Canberra 45.76.117.187 2001:19f0:5801:1989:5400:04ff:fe2d:ea08
Melbourne 67.219.101.98 2401:c080:2000:1575:5400:3ff:fef1:d5b6
Perth 154.26.155.233 —
New Zealand Auckland 45.15.140.36 2a14:3085::a2

Middle East

5 probes 5 countries
Country City IPv4 address IPv6 address
Bahrain Manamah 87.237.196.10 —
Israel Tel Aviv 5.188.227.29 2a03:90c0:1e7::c1
Saudi Arabia Riyadh 95.177.214.34 —
United Arab Emirates Dubai 38.54.75.244 —
Qatar Doha 213.130.121.18 —

Africa

3 probes 2 countries
Country City IPv4 address IPv6 address
Egypt Cairo 213.158.188.34 —
South Africa Johannesburg 85.234.81.30 2a03:90c0:1f6::c9
Cape Town 197.98.12.17 —
Pick your locations

Monitor from 179 locations

Checks as often as every 30 seconds from the Professional plan up, confirmed by up to 3 independent checkpoints before an alert fires.

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