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Network Tools

Ping a host and check HTTP from many locations, look up a domain's registration and the network that announces an IP, match a MAC address to its vendor, and read one certificate, one set of response headers, or a redirect chain.

8 tools Nothing you enter is stored. Free, no sign-up Updated

All Network Tools

  • Ping

    Four pings from each available location, with the time of every packet.

  • HTTP Check

    HTTP status and response time from each available location, without downloading the page.

  • Whois Lookup

    Registrar, domain status, name servers, and dates from the registry's RDAP record.

  • IP to ASN

    ASN, network name, and registry for one public IPv4 or IPv6 address.

  • MAC Vendor Lookup

    Organization name for a MAC prefix from the IEEE assignment list.

  • SSL Certificate

    Subject, alternative names, issuer, validity, and key type for the certificate on port 443.

  • HTTP Headers

    Status, final URL, and response headers from one GET.

  • Redirect Checker

    Every redirect hop, with status, Location, and time, up to 10 hops.

Reachability

A ping sends four packets from each location that is up and lists the round-trip time for every packet. An HTTP check asks the same locations for the status line of one address. Both show every location from that request. The set of cities changes from one check to the next. The same destination is measured once a minute, and a repeat in that minute shows the result already in hand.

Names, vendors, and a single read

Whois Lookup reads the public registration record for a domain name. IP to ASN names the autonomous system that announces an address. MAC Vendor Lookup matches the first bits of a MAC address to the organization that registered them. SSL Certificate reads the certificate on port 443. HTTP Headers lists the response headers from one GET. Redirect Checker follows each hop and shows the status and the next address.

DNS record lookups stay in DNS Tools. Subnet math and IP format conversion stay in Internet Tools.

Frequently asked questions

Do you store what I type?

No. The name or address is used for that check and is not stored.

Where does a ping run?

From many locations, not from one server. Each row is one of those locations.

Why does a second check of the same host wait?

That destination was already measured in the last minute. The page shows that result instead of sending another round of probes.