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  IP Address to Country, Region / state ,city   IP-Country-Region-City mapping Database  

Frequently Asked Questions

How often is the IP-Country-Region-City mapping Database updated?
The database is updated every month. About 1% of the database changes every month.

Are the monthly update a complete set of all entries or only a part of all IP-Addresses ?
The monthly update are a complete set of all entrie.

How do you dispatch the montly updates? By e-mail, regular mail,downloadable?
Downloadable.

Would it be possible to receive the database as a mysql dump file instead of the CSV file?
You can receive the database as a mysql dump file instead of the CSV file.

How much of the IP Address space do you cover?
We cover all of the IPv4 space, including all publically available IP addresses.

How many IP addresses are in your IP-Country-Region-City mapping Database? How many countries are included?
Please see our Technical Details page.

How accurate is your database?
The database has over 98% of accuracy in country level, 75% in region level and 63% in city level.

What is the database format?
The database format is known as Comma Separated Values (CSV). All fields are separated by a comma and each individual line is a record by itself.

What is the definition of each column in the table?

Field Data Type Field Description
Start IP Number unsigned int First IP in netblock, IP Number
End IP Number unsigned int Last IP in netblock, IP Number
Country Code char(2) ISO 3166 Country Code
Country Name varchar(50) The name of the country
Region vchar(128) Region or state name.
City varchar(255) Name of City

What is the size of the database?
The March 2005 CSV file is 17.35 Megabytes.

How do I convert a IP Address to a IP Number?

IP address (IPV4) is divided into 4 sub-blocks. Each sub-block has a different weight number each powered by 256.
Beginning IP number and Ending IP Number are calcuated as follows:
IP Number = 16777216*w + 65536*x + 256*y + z
where IP Address = w.x.y.z

PHP Function To Convert IP Address to IP Number
-----------------------------------------------
function Dot2LongIP ($IPaddr)
{
if ($IPaddr == "") {
return 0;
} else {
$ips = split ("\.", "$IPaddr");
return ($ips[3] + $ips[2] * 256 + $ips[1] * 65536 + $ips[0]
*16777216); }
}

ASP Function To Convert IP Address to IP Number
-----------------------------------------------
Function Dot2LongIP (ByVal DottedIP)
Dim i, pos
Dim PrevPos, num
If DottedIP = "" Then
Dot2LongIP = 0
Else
For i = 1 To 4
pos = InStr(PrevPos + 1, DottedIP, ".", 1)
If i = 4 Then
pos = Len(DottedIP) + 1
End If
num = Int(Mid(DottedIP, PrevPos + 1, pos - PrevPos - 1))
PrevPos = pos
Dot2LongIP = ((num Mod 256) * (256 ^ (4 - i))) + Dot2LongIP
Next
End If
End Function

How do I use this database?
First, import this database into your MS-SQL, MS-ACCESS, PL/SQL, MySQL database and etc. Then, write a query to get a recordset.

Example of SQL Query
====================
SELECT [COUNTRY NAME COLUMN] FROM [IP-COUNTRY TABLE] WHERE
[SEARCH IP NO] BETWEEN [IP FROM COLUMN] AND [IP TO COLUMN]

 If you have a question that is not answered here, please e-mail it to techsupport@ip2country.net.

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