Code allocations for the 01666 STD code

Summary

  • Status
    • Free for National Dialling Only: 20
    • Allocated: 106
    • Protected: 234
    • Free: 1
  • Operators : 87
  • Latest change : July 2012
Click here for Status definitions
Have you received a call from a number beginning 01666? Get information on a full number beginning 01666, using our full UK number search.
Find out about the location and calling costs for 01666 numbers on our 01666 code page.

This page contains information about which telephone companies the various 01666 numbers are allocated to.

First Digits Status Communications Provider Number Length Notes Change
01666 00 Free for National Dialling Only - (0)+10 - -
01666 01 Free for National Dialling Only - (0)+10 - -
01666 02 Free for National Dialling Only - (0)+10 - -
01666 03 Free for National Dialling Only - (0)+10 - -
01666 04 Free for National Dialling Only - (0)+10 - -
01666 05 Free for National Dialling Only - (0)+10 - -
01666 06 Free for National Dialling Only - (0)+10 - -
01666 07 Free for National Dialling Only - (0)+10 - -
01666 08 Free for National Dialling Only - (0)+10 - -
01666 09 Free for National Dialling Only - (0)+10 - -
01666 10 Free for National Dialling Only - (0)+10 - -
01666 11 Free for National Dialling Only - (0)+10 - -
01666 12 Free for National Dialling Only - (0)+10 - -
01666 13 Free for National Dialling Only - (0)+10 - -
01666 14 Free for National Dialling Only - (0)+10 - -
01666 15 Free for National Dialling Only - (0)+10 - -
01666 16 Free for National Dialling Only - (0)+10 - -
01666 17 Free for National Dialling Only - (0)+10 - -
01666 18 Free for National Dialling Only - (0)+10 - -
01666 19 Free for National Dialling Only - (0)+10 - -
01666 20 Allocated TelNG Limited 4+6 F-Digit '2' 28/02/2007
01666 21 Allocated Frontier Systems Ltd 4+6 F-Digit '3' 27/09/2007
01666 22 Allocated Barritel Limited 4+6 F-Digit '2' 26/06/2007
01666 230 Protected - 4+6 - -
01666 231 Protected - 4+6 - -
01666 232 Protected - 4+6 - -
01666 233 Protected - 4+6 - -
01666 234 Protected - 4+6 - -
01666 235 Protected - 4+6 - -
01666 236 Protected - 4+6 - -
01666 237 Protected - 4+6 - -
01666 238 Allocated TalkTalk Communications Limited 4+6 - 20/01/2012
01666 239 Allocated TalkTalk Communications Limited 4+6 - 20/01/2012
01666 24 Allocated Teledesign Ltd 4+6 F-Digit '2' 28/09/2007
01666 25 Allocated (aq) Limited trading as aql 4+6 - 03/10/2007
01666 26 Allocated Localphone Limited 4+6 F-Digit '0' 10/05/2007
01666 27 Allocated VoIP-Un Limited 4+6 F-Digit '0' 01/11/2007
01666 280 Protected - 4+6 - -
01666 281 Protected - 4+6 - -
01666 282 Protected - 4+6 - -
01666 283 Protected - 4+6 - -
01666 284 Protected - 4+6 - -
01666 285 Protected - 4+6 - -
01666 286 Protected - 4+6 - -
01666 287 Protected - 4+6 - -
01666 288 Protected - 4+6 - -
01666 289 Protected - 4+6 - -
01666 29 Allocated Nationwide Telephone Assistance Ltd 4+6 F-Digit '0' 02/10/2007
01666 30 Allocated Syntec Limited 4+6 - 22/11/2005
01666 310 Allocated Nexbridge Communications Limited 4+6 - 17/03/2011
01666 311 Allocated British Sky Broadcasting Limited 4+6 - 18/04/2011
01666 312 Protected - 4+6 - -
01666 313 Free - 4+6 - -
01666 314 Allocated Internexus Networks Limited 4+6 - 22/11/2011
01666 315 Allocated Minotaur Telecom Limited 4+6 - 27/10/2011
01666 316 Allocated Barritec Limited 4+6 - 28/09/2011
01666 317 Allocated iNet Telecoms Ltd (Voipfone) 4+6 - 17/10/2011
01666 318 Allocated Hello Telecom (UK) PLC 4+6 - 17/11/2011
01666 319 Allocated Orbtalk Limited 4+6 - 23/02/2012
01666 32 Allocated Danemere Street Creative 4+6 - 14/06/2005
01666 33 Allocated Gamma Telecom Holdings Ltd 4+6 - 04/05/2005
01666 340 Protected - 4+6 - -
01666 341 Protected - 4+6 - -
01666 342 Protected - 4+6 - -
01666 343 Protected - 4+6 - -
01666 344 Allocated Six Degrees Unified Comms Limited 4+6 - 29/11/2012
01666 345 Protected - 4+6 - -
01666 346 Protected - 4+6 - -
01666 347 Protected - 4+6 - -
01666 348 Protected - 4+6 - -
01666 349 Protected - 4+6 - -
01666 350 Protected - 4+6 - -
01666 351 Protected - 4+6 - -
01666 352 Protected - 4+6 - -
01666 353 Protected - 4+6 - -
01666 354 Protected - 4+6 - -
01666 355 Protected - 4+6 - -
01666 356 Protected - 4+6 - -
01666 357 Protected - 4+6 - -
01666 358 Protected - 4+6 - -
01666 359 Protected - 4+6 - -
01666 36 Allocated IV Response Limited 4+6 - 25/07/2005
01666 370 Protected - 4+6 - -
01666 371 Protected - 4+6 - -
01666 372 Protected - 4+6 - -
01666 373 Protected - 4+6 - -
01666 374 Protected - 4+6 - -
01666 375 Protected - 4+6 - -
01666 376 Protected - 4+6 - -
01666 377 Allocated Spitfire Network Services Ltd 4+6 - 19/09/2006
01666 378 Protected - 4+6 - -
01666 379 Protected - 4+6 - -
01666 38 Allocated Net Solutions Europe Limited 4+6 F-Digit '8' 21/02/2006
01666 39 Allocated TTNC Limited 4+6 F-Digits '0,1,2,3,4,5,6,7,8,9' 28/09/2006
01666 40 Allocated InTechnology Plc 4+6 F-Digit '2' 27/11/2007
01666 410 Protected - 4+6 - -
01666 411 Protected - 4+6 - -
01666 412 Protected - 4+6 - -
01666 413 Protected - 4+6 - -
01666 414 Protected - 4+6 - -
01666 415 Protected - 4+6 - -
01666 416 Protected - 4+6 - -
01666 417 Allocated Premium O Limited 4+6 - 04/02/2008
01666 418 Protected - 4+6 - -
01666 419 Protected - 4+6 - -
01666 42 Allocated Telecom2 Ltd 4+6 F-Digit '6' 11/09/2009
01666 43 Allocated Timico Limited 4+6 F-Digit '8' 16/05/2008
01666 44 Allocated Net-Work Internet Ltd 4+6 F-Digit '4' 28/05/2008
01666 450 Allocated Voxbone SA 4+6 - 09/12/2011
01666 451 Protected - 4+6 - -
01666 452 Protected - 4+6 - -
01666 453 Protected - 4+6 - -
01666 454 Protected - 4+6 - -
01666 455 Protected - 4+6 - -
01666 456 Protected - 4+6 - -
01666 457 Protected - 4+6 - -
01666 458 Protected - 4+6 - -
01666 459 Protected - 4+6 - -
01666 46 Allocated Nodemax Limited 4+6 F-Digit '0' 09/07/2008
01666 47 Allocated Starcomm Ltd 4+6 F-Digit '0' 26/09/2008
01666 48 Allocated 3C Limited 4+6 F-Digit '2' 01/10/2008
01666 49 Allocated Served Up Limited. 4+6 F-Digit '5' 16/10/2008
01666 50 Allocated BT 4+6 - 15/07/1994
01666 51 Allocated BT 4+6 - 15/07/1994
01666 520 Allocated Inclarity Communications Ltd 4+6 - 03/02/2005
01666 521 Allocated Inclarity Communications Ltd 4+6 - 03/02/2005
01666 522 Allocated Inclarity Communications Ltd 4+6 - 03/02/2005
01666 523 Protected - 4+6 - -
01666 524 Protected - 4+6 - -
01666 525 Allocated Inclarity Communications Ltd 4+6 - 03/02/2005
01666 526 Protected - 4+6 - -
01666 527 Protected - 4+6 - -
01666 528 Protected - 4+6 - -
01666 529 Protected - 4+6 - -
01666 53 Allocated Vodafone Ltd (C&W) 4+6 - 15/02/2010
01666 54 Allocated Edge Telecom Limited 4+6 - 08/04/2005
01666 55 Allocated BT 4+6 - 14/11/1994
01666 560 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 561 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 562 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 563 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 564 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 565 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 566 Protected - 4+6 - -
01666 567 Protected - 4+6 - -
01666 568 Protected - 4+6 - -
01666 569 Allocated Vodafone Ltd (Thus) 4+6 - 21/03/2000
01666 57 Allocated BT 4+6 - 15/07/1994
01666 58 Allocated Verizon UK Ltd 4+6 - 03/12/2004
01666 59 Allocated Easynet Enterprise Services Limited 4+6 - 26/04/2005
01666 60 Allocated Solutios Limited 4+6 F-Digit '2' 20/11/2008
01666 61 Allocated IPV6 Limited 4+6 F-Digit '0' 13/02/2009
01666 62 Allocated Mars Communications Limited 4+6 - 05/02/2009
01666 63 Allocated Telecoms World Direct Ltd 4+6 F-Digit '0' 28/04/2009
01666 64 Allocated Andrews & Arnold (Numbers) Ltd 4+6 F-Digit '0' 27/03/2009
01666 65 Allocated Mundio Mobile Limited 4+6 F-Digit '6' 30/06/2009
01666 66 Allocated X-Pilot Limited 4+6 F-Digit '0' 17/06/2009
01666 67 Allocated CFL Communications Limited 4+6 F-Digit '0' 14/07/2009
01666 68 Allocated Nexus Telecommunications Limited 4+6 F-Digit '0' 11/06/2009
01666 69 Allocated Level 3 Communications UK Limited 4+6 F-Digit '1' 14/08/2009
01666 70 Allocated Known Communications Limited 4+6 F-Digit '0' 18/09/2009
01666 710 Allocated Digitech Solutions Global Limited 4+6 - 27/04/2010
01666 711 Allocated Calltracks Limited 4+6 - 08/07/2010
01666 712 Allocated Atomstream Limited 4+6 - 14/05/2010
01666 713 Allocated Telephone Box Limited 4+6 - 15/12/2010
01666 714 Allocated VoiceHost Limited 4+6 - 05/10/2010
01666 715 Allocated Windsor Telecom Plc 4+6 - 22/07/2010
01666 716 Allocated Telappliant Ltd 4+6 - 21/06/2010
01666 717 Allocated Suretec Systems Ltd 4+6 - 07/05/2010
01666 718 Allocated Affiniti Integrated Solutions Ltd 4+6 - 09/07/2010
01666 719 Allocated Simwood eSMS Limited 4+6 - 03/08/2010
01666 720 Allocated Cheers International Sales Limited 4+6 - 15/12/2010
01666 721 Allocated Phone Co-Op Numbering Limited 4+6 - 23/12/2010
01666 722 Allocated Globecom International Limited 4+6 - 04/01/2011
01666 723 Allocated Invosys Limited 4+6 - 19/01/2011
01666 724 Allocated IP Base Ltd 4+6 - 03/02/2011
01666 725 Allocated Broadcast Telecom Ltd 4+6 - 29/02/2012
01666 726 Allocated Bicom Systems EURL 4+6 - 01/03/2012
01666 727 Allocated Invoco Ltd 4+6 - 03/04/2012
01666 728 Allocated API Telecom Limited 4+6 - 05/04/2012
01666 729 Allocated ICC Networks Ltd 4+6 - 16/04/2012
01666 730 Allocated Content Guru Ltd 4+6 - 12/10/2012
01666 731 Allocated Ziron (UK) Ltd 4+6 - 31/07/2012
01666 732 Allocated We Love Communications Limited 4+6 - 13/08/2012
01666 733 Allocated Media Hawk Ltd 4+6 - 10/04/2013
01666 734 Allocated Kalnet4u Ltd 4+6 - 30/05/2013
01666 735 Allocated i-Net Communications Group Plc 4+6 - 03/07/2013
01666 736 Allocated IOVOX Limited 4+6 - 27/03/2014
01666 737 Allocated Radius Communications Limited 4+6 - 08/01/2014
01666 738 Allocated Affiniti Integrated Solutions Ltd 4+6 - 21/07/2014
01666 739 Allocated XoverX Ltd 4+6 - 30/04/2013
01666 740 Protected - 4+6 - -
01666 741 Protected - 4+6 - -
01666 742 Protected - 4+6 - -
01666 743 Protected - 4+6 - -
01666 744 Protected - 4+6 - -
01666 745 Protected - 4+6 - -
01666 746 Protected - 4+6 - -
01666 747 Protected - 4+6 - -
01666 748 Protected - 4+6 - -
01666 749 Protected - 4+6 - -
01666 750 Protected - 4+6 - -
01666 751 Protected - 4+6 - -
01666 752 Protected - 4+6 - -
01666 753 Protected - 4+6 - -
01666 754 Protected - 4+6 - -
01666 755 Protected - 4+6 - -
01666 756 Protected - 4+6 - -
01666 757 Protected - 4+6 - -
01666 758 Protected - 4+6 - -
01666 759 Protected - 4+6 - -
01666 760 Protected - 4+6 - -
01666 761 Protected - 4+6 - -
01666 762 Protected - 4+6 - -
01666 763 Protected - 4+6 - -
01666 764 Protected - 4+6 - -
01666 765 Protected - 4+6 - -
01666 766 Protected - 4+6 - -
01666 767 Protected - 4+6 - -
01666 768 Protected - 4+6 - -
01666 769 Protected - 4+6 - -
01666 770 Protected - 4+6 - -
01666 771 Protected - 4+6 - -
01666 772 Protected - 4+6 - -
01666 773 Protected - 4+6 - -
01666 774 Protected - 4+6 - -
01666 775 Protected - 4+6 - -
01666 776 Protected - 4+6 - -
01666 777 Protected - 4+6 - -
01666 778 Protected - 4+6 - -
01666 779 Protected - 4+6 - -
01666 780 Protected - 4+6 - -
01666 781 Protected - 4+6 - -
01666 782 Protected - 4+6 - -
01666 783 Protected - 4+6 - -
01666 784 Protected - 4+6 - -
01666 785 Protected - 4+6 - -
01666 786 Protected - 4+6 - -
01666 787 Protected - 4+6 - -
01666 788 Protected - 4+6 - -
01666 789 Protected - 4+6 - -
01666 790 Protected - 4+6 - -
01666 791 Protected - 4+6 - -
01666 792 Protected - 4+6 - -
01666 793 Protected - 4+6 - -
01666 794 Protected - 4+6 - -
01666 795 Protected - 4+6 - -
01666 796 Protected - 4+6 - -
01666 797 Protected - 4+6 - -
01666 798 Protected - 4+6 - -
01666 799 Protected - 4+6 - -
01666 80 Allocated Telephony Services Limited 4+6 - 01/11/2004
01666 81 Allocated Magrathea Telecommunications Limited 4+6 - 19/11/2004
01666 82 Allocated BT 4+6 - 15/07/1994
01666 83 Allocated BT 4+6 - 15/07/1994
01666 84 Allocated BT 4+6 - 15/07/1994
01666 850 Allocated Linear Telecoms Limited 4+6 - 14/10/2010
01666 851 Protected - 4+6 - -
01666 852 Protected - 4+6 - -
01666 853 Protected - 4+6 - -
01666 854 Protected - 4+6 - -
01666 855 Protected - 4+6 - -
01666 856 Protected - 4+6 - -
01666 857 Protected - 4+6 - -
01666 858 Protected - 4+6 - -
01666 859 Protected - 4+6 - -
01666 86 Allocated BT 4+6 - 15/07/1994
01666 87 Allocated FleXtel Limited 4+6 - 23/11/2005
01666 88 Allocated BT 4+6 - 15/07/1994
01666 89 Allocated BT 4+6 - 15/07/1994
01666 900 Protected - 4+6 - -
01666 901 Protected - 4+6 - -
01666 902 Protected - 4+6 - -
01666 903 Protected - 4+6 - -
01666 904 Protected - 4+6 - -
01666 905 Protected - 4+6 - -
01666 906 Protected - 4+6 - -
01666 907 Protected - 4+6 - -
01666 908 Protected - 4+6 - -
01666 909 Protected - 4+6 - -
01666 910 Protected - 4+6 - -
01666 911 Protected - 4+6 - -
01666 912 Protected - 4+6 - -
01666 913 Protected - 4+6 - -
01666 914 Protected - 4+6 - -
01666 915 Protected - 4+6 - -
01666 916 Protected - 4+6 - -
01666 917 Protected - 4+6 - -
01666 918 Protected - 4+6 - -
01666 919 Protected - 4+6 - -
01666 920 Protected - 4+6 - -
01666 921 Protected - 4+6 - -
01666 922 Protected - 4+6 - -
01666 923 Protected - 4+6 - -
01666 924 Protected - 4+6 - -
01666 925 Protected - 4+6 - -
01666 926 Protected - 4+6 - -
01666 927 Protected - 4+6 - -
01666 928 Protected - 4+6 - -
01666 929 Protected - 4+6 - -
01666 930 Protected - 4+6 - -
01666 931 Protected - 4+6 - -
01666 932 Protected - 4+6 - -
01666 933 Protected - 4+6 - -
01666 934 Protected - 4+6 - -
01666 935 Protected - 4+6 - -
01666 936 Protected - 4+6 - -
01666 937 Protected - 4+6 - -
01666 938 Protected - 4+6 - -
01666 939 Protected - 4+6 - -
01666 940 Protected - 4+6 - -
01666 941 Protected - 4+6 - -
01666 942 Protected - 4+6 - -
01666 943 Protected - 4+6 - -
01666 944 Protected - 4+6 - -
01666 945 Protected - 4+6 - -
01666 946 Protected - 4+6 - -
01666 947 Protected - 4+6 - -
01666 948 Protected - 4+6 - -
01666 949 Protected - 4+6 - -
01666 950 Protected - 4+6 - -
01666 951 Protected - 4+6 - -
01666 952 Protected - 4+6 - -
01666 953 Protected - 4+6 - -
01666 954 Protected - 4+6 - -
01666 955 Protected - 4+6 - -
01666 956 Protected - 4+6 - -
01666 957 Protected - 4+6 - -
01666 958 Protected - 4+6 - -
01666 959 Protected - 4+6 - -
01666 960 Protected - 4+6 - -
01666 961 Protected - 4+6 - -
01666 962 Protected - 4+6 - -
01666 963 Protected - 4+6 - -
01666 964 Protected - 4+6 - -
01666 965 Protected - 4+6 - -
01666 966 Protected - 4+6 - -
01666 967 Protected - 4+6 - -
01666 968 Protected - 4+6 - -
01666 969 Protected - 4+6 - -
01666 970 Protected - 4+6 - -
01666 971 Protected - 4+6 - -
01666 972 Protected - 4+6 - -
01666 973 Protected - 4+6 - -
01666 974 Protected - 4+6 - -
01666 975 Protected - 4+6 - -
01666 976 Protected - 4+6 - -
01666 977 Protected - 4+6 - -
01666 978 Protected - 4+6 - -
01666 979 Protected - 4+6 - -
01666 980 Protected - 4+6 - -
01666 981 Protected - 4+6 - -
01666 982 Protected - 4+6 - -
01666 983 Protected - 4+6 - -
01666 984 Protected - 4+6 - -
01666 985 Protected - 4+6 - -
01666 986 Protected - 4+6 - -
01666 987 Protected - 4+6 - -
01666 988 Protected - 4+6 - -
01666 989 Protected - 4+6 - -
01666 99 Protected - N/A - -