Web
DNS
Ping
- https://ping.pe/ (DNS resolution is performed once in central location)
- https://ping.sx/
- https://globalping.io/ (max 500 endpoints per run, limited to 100000 per hour aggregated)
- https://tools.bunny.net/latency-test
- https://mtr.tools/
Local DNS
For China mainland
- https://tools.ipip.net/newping.php (UI in Chinese)
Reverse ping (latency to global locations)
ASN lookup
- https://asn.cymru.com/ (You may also query via WHOIS or DNS protocols, see https://www.team-cymru.com/ip-asn-mapping.)
HTTP request
- https://www.openstatus.dev/play/checker (no request body allowed)