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Sweden Coordination
Numbers |
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Coordination Numbers are calculated by taking DD and adding 60 and by using the modulus 10 method with the magnitudes 1 and 2 to calculate the checksum. The easiest way to recognize a coordination number is to look at the first digit of the day (DD), which will be a value from 6 to 9. For example:
A man born on 3 October 1970 with individual number 239:
701003-239 with 60
added to DD would be 701063-239
In this case the 6 in 701063-239 corresponding to the MM digits is a value from 6 to 9 so the number is a coordination number.
To calculate the checksum:
1) The digits in the year, month, and day of birth (plus 60) and the birth number are multiplied by 2 and 1 alternately:
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7
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0
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1
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0
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6
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3
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2
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3
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9
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x 2
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x 1
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x 2
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x 1
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x 2
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x 1
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x 2
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x 1
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x 2
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14
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0
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2
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0
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12
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3
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4
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3
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18
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2) Add together the digits in the products. Note that double digit numbers are regarded as individual digits for this purpose (i.e. 14 is regarded as 1 + 4 etc.):
1+4+0+2+0+1+2+3+4+3+1+8=29
3) The unit digit in the sum of the digits is subtracted from 10:
The unit sum of 29 is 9, therefore 10-9=1
4) The resulting number is the check digit:
The check digit is 1
The coordination number would be:
701063-2391
Coordination numbers are used by the Swedish authorities as a common means of identification for people that are not registered in the Swedish Population Registry and were introduced on 1 January 2000. If a person has a Coordination Number and later receives a Person Number, the Coordination Number is replaced by the Person Number.
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