diff --git a/docs/stdnum.ec.ci.rst b/docs/stdnum.ec.ci.rst
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+stdnum.ec.ci
+============
+
+.. automodule:: stdnum.ec.ci
+   :members:
diff --git a/docs/stdnum.ec.ruc.rst b/docs/stdnum.ec.ruc.rst
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+stdnum.ec.ruc
+=============
+
+.. automodule:: stdnum.ec.ruc
+   :members:
diff --git a/stdnum/ec/__init__.py b/stdnum/ec/__init__.py
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+++ b/stdnum/ec/__init__.py
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+# __init__.py - collection of Ecuadorian numbers
+# coding: utf-8
+#
+# Copyright (C) 2014 Jonathan Finlay
+#
+# 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
+
+"""Collection of Ecuadorian numbers."""
+
+# provide vat as an alias
+from stdnum.ec import ruc as vat
diff --git a/stdnum/ec/ci.py b/stdnum/ec/ci.py
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+++ b/stdnum/ec/ci.py
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+# dni.py - functions for handling Ecuadorian personal identity codes
+# coding: utf-8
+#
+# Copyright (C) 2014 Jonathan Finlay
+#
+# 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
+
+"""CI (Cédula de identidad, Ecuadorian personal identity codes).
+
+The CI is a 10 digit number used to identify Ecuadorian citizens.
+
+>>> validate('1714307103')
+'1714307103'
+>>> validate('171430710-3')
+'1714307103'
+>>> validate('1714307104')  # invalid document
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> validate('171430710')  # digit missing
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+"""
+
+from stdnum.exceptions import *
+from stdnum.util import clean
+
+
+def compact(number):
+    """Convert the number to the minimal representation. This strips the
+    number of any valid separators and removes surrounding whitespace."""
+    return clean(number, ' -').upper().strip()
+
+
+def checksum(number):
+    """Calculate the check digit."""
+    value = [int(number[x]) * (2 - x % 2) for x in range(9)]
+    total = sum(map(lambda x: x > 9 and x - 9 or x, value))
+    if int(int(number[9] if int(number[9]) != 0 else 10)) != (10 - int(str(total)[-1:])):
+        return False
+    return True
+
+
+def validate(number):
+    """Checks to see if the number provided is a valid CI number. This
+    checks the length, formatting and check digit."""
+    number = compact(number)
+    if len(number) != 10:
+        raise InvalidLength()
+    if not number.isdigit():
+        raise InvalidFormat()
+    if not checksum(number):
+        raise InvalidChecksum()
+    return number
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid CI number. This
+    checks the length, formatting and check digit."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False
diff --git a/stdnum/ec/ruc.py b/stdnum/ec/ruc.py
new file mode 100644
index 00000000..f0114bc4
--- /dev/null
+++ b/stdnum/ec/ruc.py
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+# cif.py - functions for handling Ecuadorian fiscal numbers
+# coding: utf-8
+#
+# Copyright (C) 2014 Jonathan Finlay
+#
+# 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
+
+"""RUC (Registro Único de Contribuyentes, Ecuadorian company tax number).
+
+The RUC is a tax identification number for legal entities. It has 13 digits
+where the third digit is a number who denoting the type of entity.
+
+>>> validate('1714307103001') # Natural entity
+'1714307103001'
+>>> validate('1768152130001') # Public entity
+'1768152130001'
+>>> validate('1792060346001') # Juridical entity
+'1792060346001'
+>>> validate('1792060346-001')
+'1792060346001'
+>>> validate('1763154690001')  # Invalid
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> validate('179206034601')  # too short
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+"""
+
+from stdnum.ec import ci
+from stdnum.exceptions import *
+
+
+__all__ = ['compact', 'validate', 'is_valid']
+
+
+# use the same compact function as CI
+compact = ci.compact
+
+def calc_check_sum(number):
+    result = 0
+    if int(number[2]) == 6:
+        # 6 = Public RUC
+        coefficient = "32765432"
+        result = sum(int(number[i]) * int(coefficient[i]) for i in range(8))
+        residue = result % 11
+        if residue == 0:
+            result = residue
+        else:
+            result = 11 - residue
+    elif int(number[2]) == 9:
+        # 9 = Juridical RUC
+        coefficient = "432765432"
+        result = sum(int(number[i]) * int(coefficient[i]) for i in range(9))
+        residue = result % 11
+        if residue == 0:
+            result = residue
+        else:
+            result = 11 - residue
+    elif int(number[2]) < 6:
+        # less than 6 = Natural RUC
+        coefficient = "212121212"
+        for i in range(9):
+            suma = int(number[i]) * int(coefficient[i])
+            if suma > 10:
+                str_sum = str(suma)
+                suma = int(str_sum[0]) + int(str_sum[1])
+            result += suma
+        residue = result % 10
+        if residue == 0:
+            result = residue
+        else:
+            result = 10 - residue
+    else:
+        raise InvalidFormat()
+    return result
+
+
+def validate(number):
+    """Checks to see if the number provided is a valid RUC number. This
+    checks the length, formatting, check digit and check sum."""
+    number = compact(number)
+    if len(number) != 13:
+        raise InvalidLength()
+    if not number.isdigit():
+        raise InvalidFormat()
+    checker = int(number[8]) if int(number[2]) == 6 else int(number[9])
+    if calc_check_sum(number) != checker:
+        raise InvalidChecksum()
+    return number
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid RUC number. This
+    checks the length, formatting and check digit."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False