How are people tracked?

Lead Liaison uses both cookies, IP addresses, and website client data (browser) to uniquely identify visitors. When cookies are allowed, the unique identifier becomes the email address. Past, current, and future visitors are merged together using the email address. When cookies are not allowed (blocked), the unique identifier is the visitor's IP address concatenated with the header value of "HTTP_USER_AGENT" from the user's browser.

How often is the data updated?

Lead Liaison's geolocation (city, state, country, zip, etc.) data is updated every week. Company, ISP, and domain data is updated every month.

How accurate is the data?

Lead Liaison tests the accuracy of the geolocation data on a periodic basis. In our recent tests, the databases were 99.8% accurate on a country level, 90% accurate on a state level in the US, and 84% accurate for cities in the US within a 31 mile (50 kilometer) radius. Below are additional data points on geolocation accuracy. Accuracy is determined by the location we return falling within the selected distance of the true location of the IP address. In other words, taking the 3rd data point below, 84% of the locations we return are within 31 miles of the actual location of the end-user.

Contact your Lead Liaison representative if you're seeking data points for countries other than the US.

Country	Data Point	Range	Accuracy

Country	Data Point	Range	Accuracy
United States	City	250km / 155.3 miles	93%
United States	City	100km / 62.1 miles	89%
United States	City	50km / 31 miles	84%
United States	City	25km / 15.5 miles	75%
United States	City	10km / 6.21 miles	57%
United States	City	Exact	50%
United States	Postal/Zip Code	Exact	33%

How much of the IP address space do you cover?

We cover all of the IPv4 space, including all publicly available IP addresses, and we cover nearly all IPv6 addresses in use. Note that some IP addresses may not be in use or may be reserved for private networks. These addresses are not locatable. For example, the IP address 127.0.0.1 is used by each computer to refer to itself, so it cannot be located.

How many IP addresses are in your database?

We have data on close to 4 billion IP addresses.

Totals

Countries	250
IP Addresses	3,608,222,469

Number of IP Addresses Per Country

ISO 3166 Code	Country Name	Number of IP addresses

ISO 3166 Code	Country Name	Number of IP addresses
AF	Afghanistan	143,886
AX	Åland Islands	39,557
AL	Albania	371,759
DZ	Algeria	3,746,845
AS	American Samoa	13,193
AD	Andorra	39,164
AO	Angola	1,102,601
AI	Anguilla	8,453
A1	Anonymous Proxy	57,807
AQ	Antarctica	4,419
AG	Antigua and Barbuda	54,259
AR	Argentina	18,724,710
AM	Armenia	615,977
AW	Aruba	56,330
AP	Asia/Pacific Region	137,872
AU	Australia	48,769,078
AT	Austria	11,085,216
AZ	Azerbaijan	723,556
BS	Bahamas	145,194
BH	Bahrain	460,652
BD	Bangladesh	1,068,288
BB	Barbados	159,498
BY	Belarus	1,894,798
BE	Belgium	26,906,367
BZ	Belize	241,933
BJ	Benin	64,576
BM	Bermuda	124,491
BT	Bhutan	26,048
BO	Bolivia	1,130,205
BA	Bosnia and Herzegovina	819,217
BW	Botswana	124,696
BR	Brazil	81,200,816
IO	British Indian Ocean Territory	1,535
VG	British Virgin Islands	41,916
BN	Brunei	203,517
BG	Bulgaria	4,385,180
BF	Burkina Faso	63,210
BI	Burundi	24,960
KH	Cambodia	254,208
CM	Cameroon	190,168
CA	Canada	82,641,030
CV	Cape Verde	22,784
BQ	Caribbean Netherlands	21,767
KY	Cayman Islands	200,618
CF	Central African Republic	10,757
TD	Chad	13,581
CL	Chile	10,052,748
CN	China	333,402,426
CX	Christmas Island	256
CC	Cocos (Keeling) Islands	261
CO	Colombia	17,250,682
KM	Comoros	4,357
CG	Congo - Brazzaville	52,129
CD	Congo - Kinshasa	69,361
CK	Cook Islands	8,458
CR	Costa Rica	2,562,041
CI	Côte d’Ivoire	201,600
HR	Croatia	2,410,955
CU	Cuba	257,280
CW	Curaçao	293,801
CY	Cyprus	729,997
CZ	Czech Republic	8,311,032
DK	Denmark	13,070,259
DJ	Djibouti	53,785
DM	Dominica	18,248
DO	Dominican Republic	1,569,688
EC	Ecuador	2,646,175
EG	Egypt	14,346,127
SV	El Salvador	673,432
GQ	Equatorial Guinea	13,155
ER	Eritrea	4,352
EE	Estonia	1,384,735
ET	Ethiopia	99,072
EU	Europe	4,770,187
FK	Falkland Islands	2,183
FO	Faroe Islands	42,916
FJ	Fiji	139,884
FI	Finland	13,649,934
FR	France	80,064,713
GF	French Guiana	70,224
PF	French Polynesia	62,723
TF	French Southern Territories	266
GA	Gabon	338,752
GM	Gambia

What you Need to Know about Visitor Tracking

How are people tracked?

How often is the data updated?

How accurate is the data?

How much of the IP address space do you cover?

How many IP addresses are in your database?