How to obtain multiple IP addresses from one host name by using the IdDNSResolver.

Copyright (C) 2005 Fumio Kawamata.

Created on November 3, 2005. Last modified on December 29, 2005.

I can obtain one IP address from one hostname as below.

    IPAddress:=GStack.ResolveHost(HostName, ID_DEFAULT_IP_VERSION);

Some host returns multiple IP addresses as below.

    C:\>nslookup www.yahoo.co.jp
    Server:  bind.dion.ne.jp
    Address:  210.196.3.183

    Non-authoritative answer:
    Name:    www.yahoo.co.jp
    Addresses:  202.93.91.218, 202.93.91.219, 202.229.198.216, 
                202.229.199.136, 202.229.199.147, 203.141.35.113,
                210.80.242.236, 210.80.243.14, 210.81.3.241,
                210.81.150.5, 202.93.91.214, 202.93.91.215,
                202.93.91.216, 202.93.91.217

I did not know how I can obtain multiple IP addresses from one hostname. So, I asked at the atozedsoftware.indy.general newsgroup, news.atozedsoftware.com, and I could get the answer how to do that.

I have prepared this web page for the person who do not know how to do that yet. I hope this web page will help someone.

I used:
- Windows XP Professional Service Pack 2 (Japanese version)
- Delphi 6 Professional Update Pack 2 (Japanese version)
- Indy Version 10.0.52.

Source code of main unit(text file)

Archive file (Executable file and whole source codes) resolve100.zip (300,865 bytes)

Snap shot of the prgram

[Open Laboratory]