Small list of useful public services which could ping and execute TCP/HTTP requests using different set of probes:

check-host.net

• Show IP information from DB-IP, MaxMind, IPGeolocation.io, IP2Location, IPInfo.io databases
• ICMP Ping
• TCP port check on any port
• UDP port check on any port (with an empty UDP packet)
• DNS resolution (All A and AAAA records, PTR)
• HTTP/HTTPS check on any port

Includes probes from Russia, Iran, Turkey, Ukraine (incl. Starlink), among other countries.

Screenshot 2024-03-19 at 12-55-51 Check website performance and response Check host - online website monitoring-fs8804×1373 98.6 KB

ping-admin.com

• Lots of probes in Russia
• Only HTTP/HTTPS checks on any port

Screenshot 2024-03-19 at 13-00-11 Free site availability checks all over the world Ping-Admin.Com - web site and server monitoring. Site availability checks-fs8685×2111 66.2 KB

Screenshot 2024-03-19 at 13-02-06 Free site availability checks all over the world Ping-Admin.Com - web site and server monitoring. Site availability checks-fs8786×1320 127 KB

ping.pe

All commands support IPv4 and IPv6

• ICMP Ping
• TCP open port check
• Traceroute via mtr
• All possible DNS resolution (A, AAAA, CNAME, TXT, MX, NS, PTR, CAA, with any external resolver)

Includes probes in Iran, Saudi Arabia, and especially China
Guiyang (Huawei), Beijing (Tencent), Beijing (Huawei), Shandong (China Unicom), Jiangsu (China Telecom), Jiangsu (China Mobile), Qingdao (Aliyun), Zhejiang (China Telecom), Shanghai (Aliyun), Shanghai (Huawei), Shanghai (Tencent)

Screenshot 2024-03-19 at 13-17-18 mtr ntc.party-fs81057×3381 193 KB

looking.house

Looking glass with very extensive number of probes.

• A/AAAA resolution with host
• ICMP ping (IPv4/IPv6)
• mtr/mtr6

Screenshot 2024-03-19 at 13-22-26 Looking Glass points-fs8954×789 40.4 KB

Screenshot 2024-03-19 at 13-24-18 Point in Turkey Istanbul data center Mitues Global Teknolojiler Ltd from Venois Hosting-fs8956×1131 76.1 KB

globalcheck.net

• Russian probes
• HTTP/HTTPS check on any port
• ICMP Ping
• TCP port check

Screenshot 2024-03-19 at 20-41-32 GlobalCheck - availability check network-fs8927×858 29.8 KB

Some services block HTTP/HTTPS requests to IP address.
To easily “convert” IP to domain name, use nip.io or sslip.io services.

1.1.1.1 is 1.1.1.1.nip.io (or 1-1-1-1.nip.io)

Mainland China

Looking Glass Servers

https://toolbox.googleapps.com/apps/dig

https://w.ranr.noc.gov.ru

https://cmu.gov.ru

dnssec-or-not.com
Quick test whether your current connection is using DNSSEC now or not