IP Tests (eg. 38.107.191.116)

Spam Database Lookup

See if a mail server is in any spam database

   Enter IP or domain name

Reverse DNS lookup

Enter IP (or host name)

   Enter IP (or host name)

IPWHOIS Lookup

Lists contact info for a domain/IP

   Enter IP (or host name)  

IP Information

Shows info about an IP, including city and country

   Enter IP  

Hostname Tests (e.g. www.example.com)

DNS Lookup

Look up a DNS record (A, MX, NS, SOA, etc.)

   AAAAA ALL (ANY) CNAME MXNS PTR SOA SPF SRV TXT    Enter domain or host name

Traceroute

Traces the route packets take to this host.

   Enter host name (or IP)

Ping

Shows how long it takes for packets to reach a host.

   Enter host name (or IP)  

ISP Cached DNS Lookup

Check cached DNS at major ISPs.

   A AAAA ALL CNAME MX NS PTR SOA SPF SRV TXT    Enter domain or host name  

Domain Name Tests (eg. example.com)

DNS Report

See if there are problems with your DNS hosting

   (Enter zone name, such as "example.com", not an IP)

DNS Timing

Check speed of your DNS hosting

   A AAAA CNAME MX PTR SOA SPF SRV TXT    Enter domain or host name

WHOIS Lookup

Lists contact info for a domain/IP

   Enter domain or host name

Additional Tests

Abuse Lookup

Finds abuse contact for a domain from abuse.net.

   Enter domain name

URL DEOBFUSCATOR

De-obfuscates confusing URLs.

   Enter URL

Free E-mail Lookup

Is an E-mail address a known free one?

   Enter E-mail address or domain  

Decimal IPs

Converts a decimal IP (e.g. 644595572) into an IP.

   Enter decimal IP  

CIDR/Netmask

Calculates CIDR ranges (e.g. 192.168.112.0/24).

   Enter CIDR range or IP

E-mail Test

Are there problems sending mail to a user or domain?

   Enter E-mail address or domain

CSE HTML Validator

Finds HTML errors in websites.

   Enter website