diff --git a/README b/README
index 563e4eb4..e68ba924 100644
--- a/README
+++ b/README
@@ -55,6 +55,7 @@ Currently this package supports the following formats:
  * IMSI (International Mobile Subscriber Identity)
  * Kennitala (Icelandic personal and organisation identity code)
  * VSK number (Virðisaukaskattsnúmer, Icelandic VAT number)
+ * IK (Isikukood, Estonian personal ID)
  * ISAN (International Standard Audiovisual Number)
  * ISBN (International Standard Book Number)
  * ISIL (International Standard Identifier for Libraries)
diff --git a/stdnum/ee/ik.py b/stdnum/ee/ik.py
new file mode 100644
index 00000000..6633ff2b
--- /dev/null
+++ b/stdnum/ee/ik.py
@@ -0,0 +1,91 @@
+# ik.py - functions for handling Estonian Personal ID numbers (IK)
+# coding: utf-8
+#
+# Copyright (C) 2012, 2013 Arthur de Jong, 2015 Tomas Karasek
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+""" (Isikukood, Estonian Personcal ID number).
+
+>>> validate('36805280109')
+'36805280109'
+>>> validate('36805280108')  # incorrect check digit
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> print get_birth_date('36805280109')
+1968-05-28
+
+"""
+
+import stdnum.exceptions
+from stdnum.util import clean
+import datetime
+
+
+def compact(number):
+    return number.strip()
+
+
+def get_birth_date(number):
+    if number[0] in ['1','2']:
+        century = 1800
+    elif number[0] in ['3','4']:
+        century = 1900
+    elif number[0] in ['5','6']:
+        century = 2000
+    else:
+        raise stdnum.exceptions.ValidationError("Wrong first number of IK: %s" % number)
+    year = century + int(number[1:3])
+    month = int(number[3:5])
+    day = int(number[5:7])
+    return datetime.date(year,month,day)
+
+
+def get_check(number):
+    checksum = int(number[9])
+    for i, n in enumerate(number[:9]):
+        checksum += int(n) * (i+1)
+    check = checksum % 11
+    if check == 10:
+        checksum = 0
+        for i, n in enumerate(number[:7]):
+            checksum += int(n) * (i + 3)
+        for i, n in enumerate(number[7:10]):
+            checksum += int(n) * (i + 1)
+        check = checksum % 11
+        check = check % 10
+    return str(check)
+
+
+def validate(number):
+    if len(number) != 11:
+        raise stdnum.exceptions.InvalidLength()
+    if not number.isdigit():
+        raise stdnum.exceptions.InvalidFormat()
+    get_birth_date(number)
+    check = get_check(number)
+    if check != number[10]:
+        raise stdnum.exceptions.InvalidChecksum()
+    return number
+       
+
+def is_valid(number):
+    try:
+        return bool(validate(number))
+    except ValidationError, ValueError:
+        return False
+
diff --git a/tests/test_ee_ik.doctest b/tests/test_ee_ik.doctest
new file mode 100644
index 00000000..9c15471e
--- /dev/null
+++ b/tests/test_ee_ik.doctest
@@ -0,0 +1,103 @@
+test_ee_ik.doctest - test for estonian personal id
+
+Copyright (C) 2013 Arthur de Jong
+Copyright (C) 2015 Tomas Karasek
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA
+
+>>> from stdnum.ee import ik
+>>> import stdnum.exceptions
+>>> ik.validate('36805280109')
+'36805280109'
+>>> ik.is_valid('36805280109')
+True
+>>> ik.get_birth_date('36805280109')
+datetime.date(1968, 5, 28)
+>>> ik.get_check('36805280109')
+'9'
+>>> ik.validate('86805280109')
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+  File "stdnum/ee/ik.py", line 79, in validate
+    get_birth_date(number)
+  File "stdnum/ee/ik.py", line 51, in get_birth_date
+    raise ValidationError("Wrong first number of IK: %s" % number)
+ValidationError: Wrong first number of IK: 86805280109
+>>> ik.validate('36805280108')
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+  File "stdnum/ee/ik.py", line 82, in validate
+    raise InvalidChecksum()
+InvalidChecksum: The number's checksum or check digit is invalid.
+>>> ik.validate('368052801099')
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+  File "stdnum/ee/ik.py", line 76, in validate
+    raise stdnum.exceptions.InvalidLength()
+InvalidLength: The number has an invalid length.
+>>> ns = """
+... 36205030034
+... 36606130166
+... 38002090113
+... 36703010079
+... 36412140053
+... 37105250048
+... 35806110178
+... 38411280151
+... 38004160054
+... 37406220030
+... 37207010076
+... 46104090101
+... 47306160017
+... 35712020095
+... 35512240278
+... 37111070056
+... 36003050128
+... 34508136020
+... 37112300117
+... 37205120111
+... 36708120106
+... 36204130100
+... 36805280109
+... 36404240119
+... 37609300174
+... 38407170099
+... 35903140121
+... 36912050058
+... 36706060097
+... 37909180161
+... 37210220129
+... 35803140053
+... 37709190107
+... 36306200109
+... 36208130099
+... 37611280079
+... 35806190146
+... 44909210102
+... 37104020141
+... 35907150159
+... 36412100145
+... 49105080018
+... 37406110083
+... 36304020091
+... 37106220087
+... 34706045216
+... 37503240119
+... 38310150127
+... 46708270050
+... """
+>>> [ ik.is_valid(n) for n in ns.split("\n") if n.strip() ]
+[True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True, True]