<i>Network Toolbox</i> is your one stop shop for all the tools you need to troubleshoot your network on the go.
<b>Whois: </b>
✔ Lookup Whois information for any domain right from your android device.
✔ Quickly check if a domain is available for registration by performing a Whois lookup
✔ Choose from any of 254 known whois servers, or add and query your own.
✔ Formatted Whois results to improve readability
<b>DNS: </b>
✔ Forward and reverse DNS lookups.
✔ Supported DNS record types: A, AAAA, APL, CNAME, DNAME, MX, LOC, NS, PTR, RP, SOA, SPF, SRV, TXT
<b>DNSBL / RBL Black List Check: </b>
✔ Check any host or IP against over 60 DNSBL / RBL servers
✔ Get TXT statistics for IP or domain from senderbase.org
<b>Network Block Info (ARIN): </b>
✔ Get Network Block information for any host or IP.
✔ Choose which Regional Internet Registry(RIR) to query for Network Block Information
<b>Ping: </b>
✔ Ping any host or IP.
✔ Also works on non-rooted devices from Android 4.3
<b>Port Scan: </b>
✔ Scan a host or IP for Open ports
✔ Scan progresses from Port 1 to 65535, but can be cancelled at any time. App will display results up to last scanned port.
<b>External IP Address: </b>
✔ Find your external (Internet) IP address for the network you are currently connected to.
<b>Geo Location: </b>
✔ Find the country, city, area code, region, metro, postal code, latitude and longitude of any IP address
✔ View location coordinates on a map
<b>CIDR Calculator: </b>
✔ Determine start and end addresses, address count, broadcast and network addresses for a CIDR address in the format xx.xx.xx.xx/yy
<b>Test Email Server: </b>
✔ Test your email server's configuration. Check rDNS and banner matches, server security and response times.
✔ Click here to read more about the RBL check, Geo IP and Email Server Test features: <a href="https://www.google.com/url?q=https://www.google.com/url?q%3Dhttp://goo.gl/2Yjh94%26sa%3DD%26usg%3DAFQjCNG1_aKdZOEkavVWedjEWAIen1QSIA&sa=D&usg=AFQjCNGxbVtL1I4R8axveQqKVslqPaYPHg" target="_blank">http://goo.gl/2Yjh94</a>
<b>Daytime and Quote of the Day (QOTD): </b>
✔ Supports getting date and time from any server supporting the Daytime protocol (RFC 867).
✔ Supports reading Quote of the Day from servers supporting the QOTD protocol (RFC 865).
<b>Other Features: </b>
✔ Extremely fast and light weight.
✔ Easily share results from all tools with other apps on your device.
✔ Allows text selection and copying of results
✔ Designed for Android 4.0 (ICS) but also works with older Android versions
Based on the open source <i>JFreeWhois</i> project: code.google.com/p/jfreewhois/
Based on the open source <i>dnsjava</i> project: www.dnsjava.org