0551 Dialling Code

0551 is a UK-wide dialling code used for Freephone telephone numbers.

The correct way to format a number in the 0551 code is:

0551 nnn nnnn (for dialling within the UK)
+44 551 nnn nnnn (for dialling from outside the UK)

Allocated subsets of numbers in 0551

Prefix Telecommunications Provider Last Change Notes
0551100 Pulsant (Scotland) Limited 02/2009 10 Digit Numbers
0551101 Frontier Systems Ltd 09/2007 10 Digit Numbers
0551107 24 Seven Communications Ltd 08/2009 10 Digit Numbers
0551140 BT 03/2004 10 Digit Numbers
0551143 BT 05/2001 10 Digit Numbers
0551144 BT 11/2000 10 Digit Numbers
0551145 BT 03/2004 10 Digit Numbers
0551146 BT 03/2004 10 Digit Numbers
0551147 BT 03/2004 10 Digit Numbers
0551148 BT 03/2004 10 Digit Numbers
0551149 BT 03/2004 10 Digit Numbers
0551155 Resilient Networks Plc 06/2006 10 Digit Numbers
0551650 BT 02/2002 10 Digit Numbers
0551651 BT 08/2007 10 Digit Numbers
0551652 BT 04/2008 10 Digit Numbers
0551653 BT 04/2008 10 Digit Numbers
0551654 BT 01/2011 10 Digit Numbers
0551655 BT 02/2002 10 Digit Numbers
0551656 BT 08/2007 10 Digit Numbers
0551657 BT 01/2011 10 Digit Numbers
0551658 BT 01/2011 10 Digit Numbers
0551659 BT 04/2008 10 Digit Numbers
0551660 BT 02/2002 10 Digit Numbers
0551661 BT 08/2007 10 Digit Numbers
0551662 BT 04/2008 10 Digit Numbers
0551663 BT 04/2008 10 Digit Numbers
0551664 BT 08/2007 10 Digit Numbers
0551665 BT 02/2002 10 Digit Numbers
0551666 BT 08/2007 10 Digit Numbers
0551667 BT 08/2007 10 Digit Numbers
0551668 BT 07/2011 10 Digit Numbers
0551669 BT 07/2011 10 Digit Numbers

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