This page contains information about which telephone companies the various 01670 numbers are allocated to.
| First Digits | Status | Communications Provider | Number Length | Notes | Change |
|---|---|---|---|---|---|
| 01670 00 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 01 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 02 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 03 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 04 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 05 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 06 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 07 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 08 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 09 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 10 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 11 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 12 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 13 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 14 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 15 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 16 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 17 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 18 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 19 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01670 200 | Allocated | Bicom Systems EURL | 4+6 | - | 01/03/2012 |
| 01670 201 | Allocated | Invoco Ltd | 4+6 | - | 03/04/2012 |
| 01670 202 | Allocated | VoiceHost Limited | 4+6 | - | 20/08/2010 |
| 01670 203 | Allocated | API Telecom Limited | 4+6 | - | 05/04/2012 |
| 01670 204 | Allocated | ICC Networks Ltd | 4+6 | - | 16/04/2012 |
| 01670 205 | Allocated | Orbtalk Limited | 4+6 | - | 24/04/2012 |
| 01670 206 | Allocated | ICC Networks Ltd | 4+6 | - | 18/04/2012 |
| 01670 207 | Allocated | TalkTalk Communications Limited | 4+6 | - | 21/05/2012 |
| 01670 208 | Allocated | IOVOX Limited | 4+6 | - | 04/07/2012 |
| 01670 209 | Allocated | Simwood eSMS Limited | 4+6 | - | 26/04/2012 |
| 01670 21 | Allocated | FleXtel Limited | 4+6 | - | 23/11/2005 |
| 01670 22 | Allocated | British Sky Broadcasting Limited | 4+6 | F-Digits '0,1,2,3,4,5,6,7' | 07/06/2006 |
| 01670 230 | Protected | - | 4+6 | - | - |
| 01670 231 | Protected | - | 4+6 | - | - |
| 01670 232 | Protected | - | 4+6 | - | - |
| 01670 233 | Protected | - | 4+6 | - | - |
| 01670 234 | Protected | - | 4+6 | - | - |
| 01670 235 | Protected | - | 4+6 | - | - |
| 01670 236 | Protected | - | 4+6 | - | - |
| 01670 237 | Protected | - | 4+6 | - | - |
| 01670 238 | Protected | - | 4+6 | - | - |
| 01670 239 | Protected | - | 4+6 | - | - |
| 01670 24 | Allocated | TelNG Limited | 4+6 | F-Digit '2' | 28/02/2007 |
| 01670 250 | Protected | - | 4+6 | - | - |
| 01670 251 | Protected | - | 4+6 | - | - |
| 01670 252 | Protected | - | 4+6 | - | - |
| 01670 253 | Protected | - | 4+6 | - | - |
| 01670 254 | Protected | - | 4+6 | - | - |
| 01670 255 | Protected | - | 4+6 | - | - |
| 01670 256 | Protected | - | 4+6 | - | - |
| 01670 257 | Protected | - | 4+6 | - | - |
| 01670 258 | Protected | - | 4+6 | - | - |
| 01670 259 | Protected | - | 4+6 | - | - |
| 01670 26 | Allocated | Verizon UK Ltd | 4+6 | F-Digit '1' | 18/04/2007 |
| 01670 270 | Protected | - | 4+6 | - | - |
| 01670 271 | Protected | - | 4+6 | - | - |
| 01670 272 | Protected | - | 4+6 | - | - |
| 01670 273 | Protected | - | 4+6 | - | - |
| 01670 274 | Protected | - | 4+6 | - | - |
| 01670 275 | Protected | - | 4+6 | - | - |
| 01670 276 | Protected | - | 4+6 | - | - |
| 01670 277 | Protected | - | 4+6 | - | - |
| 01670 278 | Protected | - | 4+6 | - | - |
| 01670 279 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 25/11/2005 |
| 01670 280 | Allocated | Digitech Solutions Global Limited | 4+6 | - | 08/09/2010 |
| 01670 281 | Protected | - | 4+6 | - | - |
| 01670 282 | Protected | - | 4+6 | - | - |
| 01670 283 | Protected | - | 4+6 | - | - |
| 01670 284 | Protected | - | 4+6 | - | - |
| 01670 285 | Protected | - | 4+6 | - | - |
| 01670 286 | Protected | - | 4+6 | - | - |
| 01670 287 | Protected | - | 4+6 | - | - |
| 01670 288 | Protected | - | 4+6 | - | - |
| 01670 289 | Protected | - | 4+6 | - | - |
| 01670 29 | Allocated | Frontier Systems Ltd | 4+6 | F-Digit '3' | 27/09/2007 |
| 01670 30 | Allocated | Localphone Limited | 4+6 | F-Digit '0' | 10/05/2007 |
| 01670 31 | Allocated | TG Support Limited | 4+6 | F-Digit '2' | 29/05/2007 |
| 01670 32 | Allocated | VoIP-Un Limited | 4+6 | F-Digit '0' | 01/11/2007 |
| 01670 33 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 15/03/2005 |
| 01670 340 | Allocated | Linear Telecoms Limited | 4+6 | - | 14/10/2010 |
| 01670 341 | Protected | - | 4+6 | - | - |
| 01670 342 | Protected | - | 4+6 | - | - |
| 01670 343 | Protected | - | 4+6 | - | - |
| 01670 344 | Protected | - | 4+6 | - | - |
| 01670 345 | Protected | - | 4+6 | - | - |
| 01670 346 | Protected | - | 4+6 | - | - |
| 01670 347 | Protected | - | 4+6 | - | - |
| 01670 348 | Protected | - | 4+6 | - | - |
| 01670 349 | Protected | - | 4+6 | - | - |
| 01670 35 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 36 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 37 | Allocated | Danemere Street Creative | 4+6 | - | 14/06/2005 |
| 01670 380 | Allocated | Level 3 Communications UK Limited | 4+6 | - | 17/09/2003 |
| 01670 381 | Allocated | Level 3 Communications UK Limited | 4+6 | - | 17/09/2003 |
| 01670 382 | Allocated | Level 3 Communications UK Limited | 4+6 | - | 17/09/2003 |
| 01670 383 | Allocated | Level 3 Communications UK Limited | 4+6 | - | 17/09/2003 |
| 01670 384 | Protected | - | 4+6 | - | - |
| 01670 385 | Protected | - | 4+6 | - | - |
| 01670 386 | Protected | - | 4+6 | - | - |
| 01670 387 | Protected | - | 4+6 | - | - |
| 01670 388 | Protected | - | 4+6 | - | - |
| 01670 389 | Allocated | Level 3 Communications UK Limited | 4+6 | - | 17/09/2003 |
| 01670 39 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 40 | Allocated | Barritel Limited | 4+6 | F-Digit '2' | 26/06/2007 |
| 01670 41 | Allocated | (aq) Limited trading as aql | 4+6 | - | 03/10/2007 |
| 01670 42 | Allocated | InTechnology Plc | 4+6 | F-Digit '2' | 03/12/2007 |
| 01670 43 | Allocated | Telephony Services Limited | 4+6 | F-Digit '2' | 21/12/2007 |
| 01670 44 | Allocated | Net Solutions Europe Limited | 4+6 | F-Digit '4' | 22/02/2006 |
| 01670 450 | Protected | - | 4+6 | - | - |
| 01670 451 | Protected | - | 4+6 | - | - |
| 01670 452 | Protected | - | 4+6 | - | - |
| 01670 453 | Protected | - | 4+6 | - | - |
| 01670 454 | Protected | - | 4+6 | - | - |
| 01670 455 | Protected | - | 4+6 | - | - |
| 01670 456 | Protected | - | 4+6 | - | - |
| 01670 457 | Allocated | TalkTalk Communications Limited | 4+6 | - | 28/09/2007 |
| 01670 458 | Allocated | TalkTalk Communications Limited | 4+6 | - | 28/09/2007 |
| 01670 459 | Allocated | TalkTalk Communications Limited | 4+6 | - | 28/09/2007 |
| 01670 460 | Allocated | Telecom2 Ltd | 4+6 | - | 08/09/2009 |
| 01670 461 | Allocated | Nodemax Limited | 4+6 | - | 09/07/2008 |
| 01670 462 | Allocated | TalkTalk Communications Limited | 4+6 | - | 28/07/2008 |
| 01670 463 | Allocated | 3C Limited | 4+6 | - | 01/10/2008 |
| 01670 464 | Allocated | Starcomm Ltd | 4+6 | - | 03/10/2008 |
| 01670 465 | Allocated | Solutios Limited | 4+6 | - | 20/11/2008 |
| 01670 466 | Allocated | Net-Work Internet Ltd | 4+6 | - | 23/06/2008 |
| 01670 467 | Allocated | Served Up Limited. | 4+6 | - | 13/10/2008 |
| 01670 468 | Allocated | Voxbone SA | 4+6 | - | 24/09/2008 |
| 01670 469 | Allocated | Mars Communications Limited | 4+6 | - | 05/02/2009 |
| 01670 470 | Protected | - | 4+6 | - | - |
| 01670 471 | Protected | - | 4+6 | - | - |
| 01670 472 | Protected | - | 4+6 | - | - |
| 01670 473 | Protected | - | 4+6 | - | - |
| 01670 474 | Protected | - | 4+6 | - | - |
| 01670 475 | Protected | - | 4+6 | - | - |
| 01670 476 | Protected | - | 4+6 | - | - |
| 01670 477 | Allocated | Spitfire Network Services Ltd | 4+6 | - | 11/11/2011 |
| 01670 478 | Protected | - | 4+6 | - | - |
| 01670 479 | Protected | - | 4+6 | - | - |
| 01670 480 | Allocated | IPV6 Limited | 4+6 | - | 13/02/2009 |
| 01670 481 | Allocated | X-Pilot Limited | 4+6 | - | 17/06/2009 |
| 01670 482 | Allocated | Mundio Mobile Limited | 4+6 | - | 01/07/2009 |
| 01670 483 | Allocated | Telecoms World Plc | 4+6 | - | 09/06/2009 |
| 01670 484 | Allocated | Andrews & Arnold (Numbers) Ltd | 4+6 | - | 30/03/2009 |
| 01670 485 | Allocated | CFL Communications Limited | 4+6 | - | 14/07/2009 |
| 01670 486 | Allocated | Known Communications Limited | 4+6 | - | 18/09/2009 |
| 01670 487 | Allocated | Nexus Telecommunications Limited | 4+6 | - | 30/09/2009 |
| 01670 488 | Allocated | Invomo Ltd | 4+6 | - | 08/12/2009 |
| 01670 489 | Allocated | TeleWare PLC | 4+6 | - | 07/01/2010 |
| 01670 490 | Protected | - | 4+6 | - | - |
| 01670 491 | Protected | - | 4+6 | - | - |
| 01670 492 | Protected | - | 4+6 | - | - |
| 01670 493 | Protected | - | 4+6 | - | - |
| 01670 494 | Protected | - | 4+6 | - | - |
| 01670 495 | Protected | - | 4+6 | - | - |
| 01670 496 | Protected | - | 4+6 | - | - |
| 01670 497 | Allocated | Premium O Limited | 4+6 | - | 04/02/2008 |
| 01670 498 | Protected | - | 4+6 | - | - |
| 01670 499 | Protected | - | 4+6 | - | - |
| 01670 50 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 51 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 52 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 53 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 54 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 55 | Allocated | Vodafone Ltd (Energis) | 4+6 | - | 26/05/2006 |
| 01670 56 | Allocated | Vodafone Ltd (C&W) | 4+6 | - | 15/02/2010 |
| 01670 570 | Allocated | Inclarity Communications Ltd | 4+6 | - | 13/06/2005 |
| 01670 571 | Allocated | Inclarity Communications Ltd | 4+6 | - | 13/06/2005 |
| 01670 572 | Allocated | Inclarity Communications Ltd | 4+6 | - | 13/06/2005 |
| 01670 573 | Protected | - | 4+6 | - | - |
| 01670 574 | Protected | - | 4+6 | - | - |
| 01670 575 | Allocated | Inclarity Communications Ltd | 4+6 | - | 13/06/2005 |
| 01670 576 | Protected | - | 4+6 | - | - |
| 01670 577 | Protected | - | 4+6 | - | - |
| 01670 578 | Protected | - | 4+6 | - | - |
| 01670 579 | Protected | - | 4+6 | - | - |
| 01670 580 | Allocated | Six Degrees Unified Comms Limited | 4+6 | - | 29/11/2012 |
| 01670 581 | Protected | - | 4+6 | - | - |
| 01670 582 | Protected | - | 4+6 | - | - |
| 01670 583 | Protected | - | 4+6 | - | - |
| 01670 584 | Allocated | Six Degrees Unified Comms Limited | 4+6 | - | 18/11/2013 |
| 01670 585 | Protected | - | 4+6 | - | - |
| 01670 586 | Protected | - | 4+6 | - | - |
| 01670 587 | Protected | - | 4+6 | - | - |
| 01670 588 | Protected | - | 4+6 | - | - |
| 01670 589 | Protected | - | 4+6 | - | - |
| 01670 59 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 600 | Allocated | Suretec Systems Ltd | 4+6 | - | 06/05/2010 |
| 01670 601 | Allocated | Calltracks Limited | 4+6 | - | 08/07/2010 |
| 01670 602 | Allocated | Atomstream Limited | 4+6 | - | 26/03/2010 |
| 01670 603 | Allocated | Core Telecom Limited | 4+6 | - | 06/08/2010 |
| 01670 604 | Allocated | Windsor Telecom Plc | 4+6 | - | 22/07/2010 |
| 01670 605 | Allocated | Cheers International Sales Limited | 4+6 | - | 15/12/2010 |
| 01670 606 | Allocated | Telephone Box Limited | 4+6 | - | 09/12/2010 |
| 01670 607 | Allocated | Phone Co-Op Numbering Limited | 4+6 | - | 23/12/2010 |
| 01670 608 | Allocated | Globecom International Limited | 4+6 | - | 04/01/2011 |
| 01670 609 | Allocated | Invosys Limited | 4+6 | - | 20/01/2011 |
| 01670 610 | Allocated | Nexbridge Communications Limited | 4+6 | - | 17/03/2011 |
| 01670 611 | Allocated | IP Base Ltd | 4+6 | - | 03/02/2011 |
| 01670 612 | Allocated | Numbergroup Network Ltd | 4+6 | - | 28/09/2011 |
| 01670 613 | Allocated | COLT Technology Services | 4+6 | - | 20/10/2011 |
| 01670 614 | Allocated | Internexus Networks Limited | 4+6 | - | 22/11/2011 |
| 01670 615 | Allocated | Hello Telecom (UK) PLC | 4+6 | - | 12/12/2011 |
| 01670 616 | Allocated | Tesla Dynamic Ltd | 4+6 | - | 07/07/2011 |
| 01670 617 | Allocated | Barritec Limited | 4+6 | - | 28/09/2011 |
| 01670 618 | Allocated | iNet Telecoms Ltd (Voipfone) | 4+6 | - | 17/10/2011 |
| 01670 619 | Allocated | Broadcast Telecom Ltd | 4+6 | - | 29/02/2012 |
| 01670 620 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 621 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 622 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 623 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 624 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 625 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 626 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 627 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 628 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 629 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 06/09/2011 |
| 01670 630 | Allocated | Radius Communications Limited | 4+6 | - | 07/01/2014 |
| 01670 631 | Allocated | TalkTalk Communications Limited | 4+6 | - | 07/03/2014 |
| 01670 632 | Allocated | TalkTalk Communications Limited | 4+6 | - | 20/06/2014 |
| 01670 633 | Allocated | iHub UK Ltd | 4+6 | - | 18/06/2014 |
| 01670 634 | Allocated | Resilient Networks Plc | 4+6 | - | 14/05/2014 |
| 01670 635 | Free | - | 4+6 | - | - |
| 01670 636 | Free | - | 4+6 | - | - |
| 01670 637 | Allocated | British Sky Broadcasting Limited | 4+6 | - | 21/08/2013 |
| 01670 638 | Allocated | British Sky Broadcasting Limited | 4+6 | - | 21/08/2013 |
| 01670 639 | Free | - | 4+6 | - | - |
| 01670 640 | Protected | - | 4+6 | - | - |
| 01670 641 | Protected | - | 4+6 | - | - |
| 01670 642 | Protected | - | 4+6 | - | - |
| 01670 643 | Protected | - | 4+6 | - | - |
| 01670 644 | Protected | - | 4+6 | - | - |
| 01670 645 | Protected | - | 4+6 | - | - |
| 01670 646 | Protected | - | 4+6 | - | - |
| 01670 647 | Protected | - | 4+6 | - | - |
| 01670 648 | Protected | - | 4+6 | - | - |
| 01670 649 | Protected | - | 4+6 | - | - |
| 01670 650 | Protected | - | 4+6 | - | - |
| 01670 651 | Protected | - | 4+6 | - | - |
| 01670 652 | Protected | - | 4+6 | - | - |
| 01670 653 | Protected | - | 4+6 | - | - |
| 01670 654 | Protected | - | 4+6 | - | - |
| 01670 655 | Protected | - | 4+6 | - | - |
| 01670 656 | Protected | - | 4+6 | - | - |
| 01670 657 | Protected | - | 4+6 | - | - |
| 01670 658 | Protected | - | 4+6 | - | - |
| 01670 659 | Protected | - | 4+6 | - | - |
| 01670 660 | Protected | - | 4+6 | - | - |
| 01670 661 | Protected | - | 4+6 | - | - |
| 01670 662 | Protected | - | 4+6 | - | - |
| 01670 663 | Protected | - | 4+6 | - | - |
| 01670 664 | Protected | - | 4+6 | - | - |
| 01670 665 | Protected | - | 4+6 | - | - |
| 01670 666 | Protected | - | 4+6 | - | - |
| 01670 667 | Protected | - | 4+6 | - | - |
| 01670 668 | Protected | - | 4+6 | - | - |
| 01670 669 | Protected | - | 4+6 | - | - |
| 01670 670 | Protected | - | 4+6 | - | - |
| 01670 671 | Protected | - | 4+6 | - | - |
| 01670 672 | Protected | - | 4+6 | - | - |
| 01670 673 | Protected | - | 4+6 | - | - |
| 01670 674 | Protected | - | 4+6 | - | - |
| 01670 675 | Protected | - | 4+6 | - | - |
| 01670 676 | Protected | - | 4+6 | - | - |
| 01670 677 | Protected | - | 4+6 | - | - |
| 01670 678 | Protected | - | 4+6 | - | - |
| 01670 679 | Protected | - | 4+6 | - | - |
| 01670 680 | Protected | - | 4+6 | - | - |
| 01670 681 | Protected | - | 4+6 | - | - |
| 01670 682 | Protected | - | 4+6 | - | - |
| 01670 683 | Protected | - | 4+6 | - | - |
| 01670 684 | Protected | - | 4+6 | - | - |
| 01670 685 | Protected | - | 4+6 | - | - |
| 01670 686 | Protected | - | 4+6 | - | - |
| 01670 687 | Protected | - | 4+6 | - | - |
| 01670 688 | Protected | - | 4+6 | - | - |
| 01670 689 | Protected | - | 4+6 | - | - |
| 01670 690 | Protected | - | 4+6 | - | - |
| 01670 691 | Protected | - | 4+6 | - | - |
| 01670 692 | Protected | - | 4+6 | - | - |
| 01670 693 | Protected | - | 4+6 | - | - |
| 01670 694 | Protected | - | 4+6 | - | - |
| 01670 695 | Protected | - | 4+6 | - | - |
| 01670 696 | Protected | - | 4+6 | - | - |
| 01670 697 | Protected | - | 4+6 | - | - |
| 01670 698 | Protected | - | 4+6 | - | - |
| 01670 699 | Protected | - | 4+6 | - | - |
| 01670 70 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 71 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 72 | Allocated | Edge Telecom Limited | 4+6 | - | 08/04/2005 |
| 01670 73 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 740 | Protected | - | 4+6 | - | - |
| 01670 741 | Protected | - | 4+6 | - | - |
| 01670 742 | Protected | - | 4+6 | - | - |
| 01670 743 | Protected | - | 4+6 | - | - |
| 01670 744 | Protected | - | 4+6 | - | - |
| 01670 745 | Protected | - | 4+6 | - | - |
| 01670 746 | Protected | - | 4+6 | - | - |
| 01670 747 | Protected | - | 4+6 | - | - |
| 01670 748 | Protected | - | 4+6 | - | - |
| 01670 749 | Protected | - | 4+6 | - | - |
| 01670 75 | Allocated | Affiniti Integrated Solutions Ltd | 4+6 | - | 15/01/2004 |
| 01670 76 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 77 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 78 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 79 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 80 | Allocated | TTNC Limited | 4+6 | F-Digits '0,1,2,3,4,5,6,7,8,9' | 28/09/2006 |
| 01670 81 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 82 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 83 | Allocated | Syntec Limited | 4+6 | F-Digit '2' | 16/12/2005 |
| 01670 84 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 85 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 86 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01670 87 | Allocated | Nationwide Telephone Assistance Ltd | 4+6 | F-Digit '0' | 12/10/2007 |
| 01670 88 | Allocated | Teledesign Ltd | 4+6 | F-Digit '2' | 28/09/2007 |
| 01670 89 | Allocated | Magrathea Telecommunications Limited | 4+6 | - | 24/09/2004 |
| 01670 900 | Protected | - | 4+6 | - | - |
| 01670 901 | Protected | - | 4+6 | - | - |
| 01670 902 | Protected | - | 4+6 | - | - |
| 01670 903 | Protected | - | 4+6 | - | - |
| 01670 904 | Protected | - | 4+6 | - | - |
| 01670 905 | Protected | - | 4+6 | - | - |
| 01670 906 | Protected | - | 4+6 | - | - |
| 01670 907 | Protected | - | 4+6 | - | - |
| 01670 908 | Protected | - | 4+6 | - | - |
| 01670 909 | Protected | - | 4+6 | - | - |
| 01670 910 | Protected | - | 4+6 | - | - |
| 01670 911 | Protected | - | 4+6 | - | - |
| 01670 912 | Protected | - | 4+6 | - | - |
| 01670 913 | Protected | - | 4+6 | - | - |
| 01670 914 | Protected | - | 4+6 | - | - |
| 01670 915 | Protected | - | 4+6 | - | - |
| 01670 916 | Protected | - | 4+6 | - | - |
| 01670 917 | Protected | - | 4+6 | - | - |
| 01670 918 | Protected | - | 4+6 | - | - |
| 01670 919 | Protected | - | 4+6 | - | - |
| 01670 920 | Protected | - | 4+6 | - | - |
| 01670 921 | Protected | - | 4+6 | - | - |
| 01670 922 | Protected | - | 4+6 | - | - |
| 01670 923 | Protected | - | 4+6 | - | - |
| 01670 924 | Protected | - | 4+6 | - | - |
| 01670 925 | Protected | - | 4+6 | - | - |
| 01670 926 | Protected | - | 4+6 | - | - |
| 01670 927 | Protected | - | 4+6 | - | - |
| 01670 928 | Protected | - | 4+6 | - | - |
| 01670 929 | Protected | - | 4+6 | - | - |
| 01670 930 | Protected | - | 4+6 | - | - |
| 01670 931 | Protected | - | 4+6 | - | - |
| 01670 932 | Protected | - | 4+6 | - | - |
| 01670 933 | Protected | - | 4+6 | - | - |
| 01670 934 | Protected | - | 4+6 | - | - |
| 01670 935 | Protected | - | 4+6 | - | - |
| 01670 936 | Protected | - | 4+6 | - | - |
| 01670 937 | Protected | - | 4+6 | - | - |
| 01670 938 | Protected | - | 4+6 | - | - |
| 01670 939 | Protected | - | 4+6 | - | - |
| 01670 940 | Allocated | Ziron (UK) Ltd | 4+6 | - | 31/07/2012 |
| 01670 941 | Allocated | Content Guru Ltd | 4+6 | - | 12/10/2012 |
| 01670 942 | Allocated | Media Hawk Ltd | 4+6 | - | 10/04/2013 |
| 01670 943 | Allocated | Kalnet4u Ltd | 4+6 | - | 30/05/2013 |
| 01670 944 | Allocated | We Love Communications Limited | 4+6 | - | 13/08/2012 |
| 01670 945 | Allocated | Minotaur Telecom Limited | 4+6 | - | 18/12/2012 |
| 01670 946 | Allocated | TalkTalk Communications Limited | 4+6 | - | 19/08/2013 |
| 01670 947 | Allocated | i-Net Communications Group Plc | 4+6 | - | 03/07/2013 |
| 01670 948 | Allocated | XoverX Ltd | 4+6 | - | 30/04/2013 |
| 01670 949 | Allocated | Magnetic North Software Limited | 4+6 | - | 15/01/2013 |
| 01670 950 | Protected | - | 4+6 | - | - |
| 01670 951 | Protected | - | 4+6 | - | - |
| 01670 952 | Protected | - | 4+6 | - | - |
| 01670 953 | Protected | - | 4+6 | - | - |
| 01670 954 | Protected | - | 4+6 | - | - |
| 01670 955 | Protected | - | 4+6 | - | - |
| 01670 956 | Protected | - | 4+6 | - | - |
| 01670 957 | Protected | - | 4+6 | - | - |
| 01670 958 | Protected | - | 4+6 | - | - |
| 01670 959 | Protected | - | 4+6 | - | - |
| 01670 960 | Protected | - | 4+6 | - | - |
| 01670 961 | Protected | - | 4+6 | - | - |
| 01670 962 | Protected | - | 4+6 | - | - |
| 01670 963 | Protected | - | 4+6 | - | - |
| 01670 964 | Protected | - | 4+6 | - | - |
| 01670 965 | Protected | - | 4+6 | - | - |
| 01670 966 | Protected | - | 4+6 | - | - |
| 01670 967 | Protected | - | 4+6 | - | - |
| 01670 968 | Protected | - | 4+6 | - | - |
| 01670 969 | Protected | - | 4+6 | - | - |
| 01670 970 | Protected | - | 4+6 | - | - |
| 01670 971 | Protected | - | 4+6 | - | - |
| 01670 972 | Protected | - | 4+6 | - | - |
| 01670 973 | Protected | - | 4+6 | - | - |
| 01670 974 | Protected | - | 4+6 | - | - |
| 01670 975 | Protected | - | 4+6 | - | - |
| 01670 976 | Protected | - | 4+6 | - | - |
| 01670 977 | Protected | - | 4+6 | - | - |
| 01670 978 | Protected | - | 4+6 | - | - |
| 01670 979 | Protected | - | 4+6 | - | - |
| 01670 980 | Protected | - | 4+6 | - | - |
| 01670 981 | Protected | - | 4+6 | - | - |
| 01670 982 | Protected | - | 4+6 | - | - |
| 01670 983 | Protected | - | 4+6 | - | - |
| 01670 984 | Protected | - | 4+6 | - | - |
| 01670 985 | Protected | - | 4+6 | - | - |
| 01670 986 | Protected | - | 4+6 | - | - |
| 01670 987 | Protected | - | 4+6 | - | - |
| 01670 988 | Protected | - | 4+6 | - | - |
| 01670 989 | Protected | - | 4+6 | - | - |
| 01670 99 | Protected | - | N/A | - | - |