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� Home : ITU-T : Publications : Recommendations : X�Series : X.121
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X.121�:�International numbering plan for public data networks �

Recommendation X.121

In force components
Number
 Title Status
X.121 (10/00)
� 		International numbering plan for public data networks � In force
�
�
Superseded and Withdrawn components
Number
 Title Status
X.121 (11/88)
� 		International numbering plan for public data networks � Superseded
X.121 (09/92)
� 		International numbering plan for public data networks � Superseded
X.121 (10/96)
� 		International numbering plan for public data networks � Superseded

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