Reverse Tools

Domain Neighbors

Find domains, mail and name servers sharing the same IP address or subnet.

Enter domain name or IP address (IPv4 and IPv6).

MX Neighbors

Find domains sharing the same MX record (mail server).

Enter mail server or domain name. Example: tcpiputils.com or alt1.aspmx.l.google.com

NS Neighbors

Find domains sharing the same NS record (name server).

Enter name server or domain name. Example: tcpiputils.com or ns1.google.com

History Tools

Domain IP/DNS History

Lookup historical IP and DNS records for a domain name.

Enter domain name. Example: tcpiputils.com

IP History

Find domains hosted in the past on a particular IP address.

Enter hostname or IP address (IPv4 and IPv6). Example: tcpiputils.com or 148.251.153.34

MX History

Find historical connected domains to a mail server (MX record).

Enter mail server or domain name. Example: tcpiputils.com or alt1.aspmx.l.google.com

Domain Tools

Domain Search

Find registered domains based on one or more keywords.


Enter one or more keywords. Example: amsterdam, ^philips or phone$


Registration date:

Top Level Domain:

Use ^ in front of a keyword to search for domains starting with that keyword. Use $ behind a keyword to search for domains ending with that keyword. Use ? as a wildcard for one character and * as a wildcard for zero or more characters.

Find Domain Typos

Find registered domain typos and misspellings for a domain.


Enter domain name. Example: amsterdam.nl or google.com


Registration date:

Include Top Level Domain in results:

Whois Lookup

Find whois information related to a domain, IP address or AS number.

Enter domain name, IP address (IPv4 and IPv6) or AS number. Example: google.com, 8.8.8.8 or AS15169

Email & DNS Tools

DNS Lookup

Query the DNS server on all possible records.

Enter hostname or IP address (IPv4 and IPv6).

DNS Blackhole List

Check an IP address against 100 DNS based anti-spam databases.

Enter hostname or IPv4 address.

Email Test

Test an email address for successful delivery.

Enter valid email address. Example: info@tcpiputils.com

SPF Lookup

Lookup and parse the Sender Policy Framework (SPF) records of a domain.

Enter domain name. Example tcpiputils.com

Network Tools

IP Geo Lookup

Show the geographical location for IP addressess.

Enter hostname or IP address (IPv4 and IPv6).

Mac Address Lookup

Lookup all details about a MAC address.

Enter MAC Address or network vendor. Example: 00-0C-29-9B-31-13 or 3com

Ping

Perform a ping command against an internet host.


Enter hostname or IP address (IPv4 and IPv6).


Ping type:

Port Scan

Perform a port scan against your own IP address.

This tool can only run against your own IP address.

Reverse Tinyurl

See what is behind every tiny URL.

Enter short URL. Example: tinyurl.com/kavpqx6 or goo.gl/VmSenH

Traceroute

Perform a traceroute command against an internet host.

Enter hostname or IP address (IPv4 and IPv6).

Tools for you

Your public IP Address

Information about your public IP Address like reverse dns, hosting info and whois data.

my IP Address for Windows 8.1 & 10

This app shows detailed information about your IP Address, your domain and your provider.

Other services

Browser Addons

Our collection of browser extensions and apps.

Premium API

Premium API enables access for 3rd party services to our content and tools.

Premium Website Access

Premium website access is for the IT professional. You get extra page views, more alerts and extra features.