This page contains information about which telephone companies the various 01577 numbers are allocated to.
| First Digits | Status | Communications Provider | Number Length | Notes | Change |
|---|---|---|---|---|---|
| 01577 00 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 01 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 02 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 03 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 04 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 05 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 06 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 07 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 08 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 09 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 10 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 11 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 12 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 13 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 14 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 15 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 16 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 17 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 18 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 19 | Free for National Dialling Only | - | (0)+10 | - | - |
| 01577 200 | Protected | - | 4+6 | - | - |
| 01577 201 | Protected | - | 4+6 | - | - |
| 01577 202 | Protected | - | 4+6 | - | - |
| 01577 203 | Protected | - | 4+6 | - | - |
| 01577 204 | Protected | - | 4+6 | - | - |
| 01577 205 | Protected | - | 4+6 | - | - |
| 01577 206 | Protected | - | 4+6 | - | - |
| 01577 207 | Protected | - | 4+6 | - | - |
| 01577 208 | Allocated | TalkTalk Communications Limited | 4+6 | - | 11/12/2007 |
| 01577 209 | Allocated | TalkTalk Communications Limited | 4+6 | - | 11/12/2007 |
| 01577 21 | Allocated | Telephony Services Limited | 4+6 | F-Digit '2' | 07/01/2008 |
| 01577 22 | Allocated | Net-Work Internet Ltd | 4+6 | F-Digit '2' | 27/12/2007 |
| 01577 230 | Protected | - | 4+6 | - | - |
| 01577 231 | Protected | - | 4+6 | - | - |
| 01577 232 | Protected | - | 4+6 | - | - |
| 01577 233 | Protected | - | 4+6 | - | - |
| 01577 234 | Protected | - | 4+6 | - | - |
| 01577 235 | Protected | - | 4+6 | - | - |
| 01577 236 | Protected | - | 4+6 | - | - |
| 01577 237 | Allocated | Premium O Limited | 4+6 | - | 14/01/2008 |
| 01577 238 | Protected | - | 4+6 | - | - |
| 01577 239 | Protected | - | 4+6 | - | - |
| 01577 24 | Allocated | Telecom2 Ltd | 4+6 | F-Digit '6' | 10/09/2009 |
| 01577 250 | Allocated | PTGI International Carrier Services Ltd | 4+6 | - | 30/08/2011 |
| 01577 251 | Allocated | PTGI International Carrier Services Ltd | 4+6 | - | 30/08/2011 |
| 01577 252 | Protected | - | 4+6 | - | - |
| 01577 253 | Protected | - | 4+6 | - | - |
| 01577 254 | Protected | - | 4+6 | - | - |
| 01577 255 | Protected | - | 4+6 | - | - |
| 01577 256 | Protected | - | 4+6 | - | - |
| 01577 257 | Protected | - | 4+6 | - | - |
| 01577 258 | Protected | - | 4+6 | - | - |
| 01577 259 | Protected | - | 4+6 | - | - |
| 01577 26 | Allocated | Timico Limited | 4+6 | F-Digit '8' | 14/05/2008 |
| 01577 27 | Allocated | Nodemax Limited | 4+6 | F-Digit '0' | 16/07/2008 |
| 01577 28 | Allocated | X-Pilot Limited | 4+6 | F-Digit '0' | 12/08/2008 |
| 01577 29 | Allocated | Starcomm Ltd | 4+6 | F-Digit '0' | 22/09/2008 |
| 01577 30 | Allocated | Danemere Street Creative | 4+6 | - | 09/06/2005 |
| 01577 31 | Allocated | Syntec Limited | 4+6 | F-Digit '2' | 16/02/2006 |
| 01577 320 | Protected | - | 4+6 | - | - |
| 01577 321 | Protected | - | 4+6 | - | - |
| 01577 322 | Protected | - | 4+6 | - | - |
| 01577 323 | Protected | - | 4+6 | - | - |
| 01577 324 | Protected | - | 4+6 | - | - |
| 01577 325 | Protected | - | 4+6 | - | - |
| 01577 326 | Protected | - | 4+6 | - | - |
| 01577 327 | Protected | - | 4+6 | - | - |
| 01577 328 | Protected | - | 4+6 | - | - |
| 01577 329 | Protected | - | 4+6 | - | - |
| 01577 33 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | - | 16/05/2005 |
| 01577 340 | Protected | - | 4+6 | - | - |
| 01577 341 | Protected | - | 4+6 | - | - |
| 01577 342 | Allocated | Orbtalk Limited | 4+6 | - | 21/09/2011 |
| 01577 343 | Allocated | Invoco Ltd | 4+6 | - | 02/11/2011 |
| 01577 344 | Allocated | Barritec Limited | 4+6 | - | 28/09/2011 |
| 01577 345 | Allocated | Internexus Networks Limited | 4+6 | - | 21/11/2011 |
| 01577 346 | Allocated | Bicom Systems EURL | 4+6 | - | 01/03/2012 |
| 01577 347 | Allocated | Broadcast Telecom Ltd | 4+6 | - | 29/02/2012 |
| 01577 348 | Allocated | API Telecom Limited | 4+6 | - | 30/03/2012 |
| 01577 349 | Allocated | ICC Networks Ltd | 4+6 | - | 17/04/2012 |
| 01577 350 | Allocated | Inclarity Communications Ltd | 4+6 | - | 07/06/2006 |
| 01577 351 | Allocated | Inclarity Communications Ltd | 4+6 | - | 07/06/2006 |
| 01577 352 | Allocated | Inclarity Communications Ltd | 4+6 | - | 07/06/2006 |
| 01577 353 | Protected | - | 4+6 | - | - |
| 01577 354 | Protected | - | 4+6 | - | - |
| 01577 355 | Allocated | Inclarity Communications Ltd | 4+6 | - | 07/06/2006 |
| 01577 356 | Protected | - | 4+6 | - | - |
| 01577 357 | Protected | - | 4+6 | - | - |
| 01577 358 | Protected | - | 4+6 | - | - |
| 01577 359 | Protected | - | 4+6 | - | - |
| 01577 36 | Allocated | TelNG Limited | 4+6 | F-Digit '2' | 28/02/2007 |
| 01577 37 | Allocated | FleXtel Limited | 4+6 | - | 24/10/2005 |
| 01577 38 | Allocated | Frontier Systems Ltd | 4+6 | - | 26/09/2007 |
| 01577 39 | Allocated | (aq) Limited trading as aql | 4+6 | - | 03/10/2007 |
| 01577 40 | Allocated | Vodafone Ltd (Energis) | 4+6 | F-Digit '1' | 23/09/2008 |
| 01577 410 | Allocated | Voxbone SA | 4+6 | - | 09/12/2011 |
| 01577 411 | Protected | - | 4+6 | - | - |
| 01577 412 | Protected | - | 4+6 | - | - |
| 01577 413 | Protected | - | 4+6 | - | - |
| 01577 414 | Protected | - | 4+6 | - | - |
| 01577 415 | Protected | - | 4+6 | - | - |
| 01577 416 | Protected | - | 4+6 | - | - |
| 01577 417 | Protected | - | 4+6 | - | - |
| 01577 418 | Protected | - | 4+6 | - | - |
| 01577 419 | Protected | - | 4+6 | - | - |
| 01577 42 | Allocated | 3C Limited | 4+6 | F-Digit '2' | 01/10/2008 |
| 01577 43 | Allocated | Solutios Limited | 4+6 | F-Digit '2' | 03/11/2008 |
| 01577 44 | Allocated | Served Up Limited. | 4+6 | F-Digit '0' | 08/10/2008 |
| 01577 45 | Allocated | Pulsant (Scotland) Limited | 4+6 | - | 17/02/2009 |
| 01577 46 | Allocated | IPV6 Limited | 4+6 | F-Digit '0' | 06/02/2009 |
| 01577 47 | Allocated | Mars Communications Limited | 4+6 | F-Digit '0' | 05/02/2009 |
| 01577 48 | Allocated | Andrews & Arnold (Numbers) Ltd | 4+6 | F-Digit '0' | 20/03/2009 |
| 01577 49 | Allocated | Nexus Telecommunications Limited | 4+6 | F-Digit '0' | 11/06/2009 |
| 01577 50 | Allocated | Mundio Mobile Limited | 4+6 | F-Digit '6' | 30/06/2009 |
| 01577 51 | Allocated | CFL Communications Limited | 4+6 | F-Digit '0' | 13/07/2009 |
| 01577 520 | Allocated | Digitech Solutions Global Limited | 4+6 | - | 27/04/2010 |
| 01577 521 | Free | - | 4+6 | - | - |
| 01577 522 | Allocated | Suretec Systems Ltd | 4+6 | - | 06/05/2010 |
| 01577 523 | Allocated | Atomstream Limited | 4+6 | - | 12/05/2010 |
| 01577 524 | Allocated | Simwood eSMS Limited | 4+6 | - | 13/08/2010 |
| 01577 525 | Allocated | Telephone Box Limited | 4+6 | - | 10/12/2010 |
| 01577 526 | Allocated | Cheers International Sales Limited | 4+6 | - | 14/12/2010 |
| 01577 527 | Allocated | Windsor Telecom Plc | 4+6 | - | 22/07/2010 |
| 01577 528 | Allocated | iNet Telecoms Ltd (Voipfone) | 4+6 | - | 19/08/2010 |
| 01577 529 | Allocated | Phone Co-Op Numbering Limited | 4+6 | - | 23/12/2010 |
| 01577 530 | Allocated | Invosys Limited | 4+6 | - | 17/01/2011 |
| 01577 531 | Allocated | British Sky Broadcasting Limited | 4+6 | - | 01/02/2011 |
| 01577 532 | Allocated | Nexbridge Communications Limited | 4+6 | - | 17/03/2011 |
| 01577 533 | Protected | - | 4+6 | - | - |
| 01577 534 | Allocated | Globecom International Limited | 4+6 | - | 04/01/2011 |
| 01577 535 | Allocated | Hello Telecom (UK) PLC | 4+6 | - | 20/07/2012 |
| 01577 536 | Allocated | Ziron (UK) Ltd | 4+6 | - | 30/07/2012 |
| 01577 537 | Allocated | Content Guru Ltd | 4+6 | - | 12/10/2012 |
| 01577 538 | Allocated | i-Net Communications Group Plc | 4+6 | - | 25/06/2013 |
| 01577 539 | Free | - | 4+6 | - | - |
| 01577 540 | Allocated | iHub UK Ltd | 4+6 | - | 16/08/2013 |
| 01577 541 | Allocated | IOVOX Limited | 4+6 | - | 03/07/2012 |
| 01577 542 | Allocated | Kalnet4u Ltd | 4+6 | - | 23/05/2013 |
| 01577 543 | Allocated | Resilient Networks Plc | 4+6 | - | 14/05/2014 |
| 01577 544 | Allocated | We Love Communications Limited | 4+6 | - | 13/08/2012 |
| 01577 545 | Allocated | Minotaur Telecom Limited | 4+6 | - | 05/02/2013 |
| 01577 546 | Allocated | Magnetic North Software Limited | 4+6 | - | 19/02/2013 |
| 01577 547 | Allocated | Radius Communications Limited | 4+6 | - | 08/01/2014 |
| 01577 548 | Free | - | 4+6 | - | - |
| 01577 549 | Allocated | XoverX Ltd | 4+6 | - | 30/04/2013 |
| 01577 550 | Protected | - | 4+6 | - | - |
| 01577 551 | Protected | - | 4+6 | - | - |
| 01577 552 | Protected | - | 4+6 | - | - |
| 01577 553 | Protected | - | 4+6 | - | - |
| 01577 554 | Protected | - | 4+6 | - | - |
| 01577 555 | Protected | - | 4+6 | - | - |
| 01577 556 | Protected | - | 4+6 | - | - |
| 01577 557 | Protected | - | 4+6 | - | - |
| 01577 558 | Protected | - | 4+6 | - | - |
| 01577 559 | Protected | - | 4+6 | - | - |
| 01577 560 | Protected | - | 4+6 | - | - |
| 01577 561 | Protected | - | 4+6 | - | - |
| 01577 562 | Protected | - | 4+6 | - | - |
| 01577 563 | Protected | - | 4+6 | - | - |
| 01577 564 | Protected | - | 4+6 | - | - |
| 01577 565 | Protected | - | 4+6 | - | - |
| 01577 566 | Protected | - | 4+6 | - | - |
| 01577 567 | Protected | - | 4+6 | - | - |
| 01577 568 | Protected | - | 4+6 | - | - |
| 01577 569 | Protected | - | 4+6 | - | - |
| 01577 570 | Protected | - | 4+6 | - | - |
| 01577 571 | Protected | - | 4+6 | - | - |
| 01577 572 | Protected | - | 4+6 | - | - |
| 01577 573 | Protected | - | 4+6 | - | - |
| 01577 574 | Protected | - | 4+6 | - | - |
| 01577 575 | Protected | - | 4+6 | - | - |
| 01577 576 | Protected | - | 4+6 | - | - |
| 01577 577 | Protected | - | 4+6 | - | - |
| 01577 578 | Protected | - | 4+6 | - | - |
| 01577 579 | Protected | - | 4+6 | - | - |
| 01577 580 | Protected | - | 4+6 | - | - |
| 01577 581 | Protected | - | 4+6 | - | - |
| 01577 582 | Protected | - | 4+6 | - | - |
| 01577 583 | Protected | - | 4+6 | - | - |
| 01577 584 | Protected | - | 4+6 | - | - |
| 01577 585 | Protected | - | 4+6 | - | - |
| 01577 586 | Protected | - | 4+6 | - | - |
| 01577 587 | Protected | - | 4+6 | - | - |
| 01577 588 | Protected | - | 4+6 | - | - |
| 01577 589 | Protected | - | 4+6 | - | - |
| 01577 590 | Protected | - | 4+6 | - | - |
| 01577 591 | Protected | - | 4+6 | - | - |
| 01577 592 | Protected | - | 4+6 | - | - |
| 01577 593 | Protected | - | 4+6 | - | - |
| 01577 594 | Protected | - | 4+6 | - | - |
| 01577 595 | Protected | - | 4+6 | - | - |
| 01577 596 | Protected | - | 4+6 | - | - |
| 01577 597 | Protected | - | 4+6 | - | - |
| 01577 598 | Protected | - | 4+6 | - | - |
| 01577 599 | Protected | - | 4+6 | - | - |
| 01577 600 | Protected | - | 4+6 | - | - |
| 01577 601 | Protected | - | 4+6 | - | - |
| 01577 602 | Protected | - | 4+6 | - | - |
| 01577 603 | Protected | - | 4+6 | - | - |
| 01577 604 | Protected | - | 4+6 | - | - |
| 01577 605 | Protected | - | 4+6 | - | - |
| 01577 606 | Protected | - | 4+6 | - | - |
| 01577 607 | Protected | - | 4+6 | - | - |
| 01577 608 | Protected | - | 4+6 | - | - |
| 01577 609 | Protected | - | 4+6 | - | - |
| 01577 610 | Allocated | Linear Telecoms Limited | 4+6 | - | 14/10/2010 |
| 01577 611 | Protected | - | 4+6 | - | - |
| 01577 612 | Protected | - | 4+6 | - | - |
| 01577 613 | Protected | - | 4+6 | - | - |
| 01577 614 | Protected | - | 4+6 | - | - |
| 01577 615 | Protected | - | 4+6 | - | - |
| 01577 616 | Protected | - | 4+6 | - | - |
| 01577 617 | Protected | - | 4+6 | - | - |
| 01577 618 | Protected | - | 4+6 | - | - |
| 01577 619 | Protected | - | 4+6 | - | - |
| 01577 62 | Allocated | VoIP-Un Limited | 4+6 | F-Digit '0' | 31/10/2007 |
| 01577 63 | Allocated | Teledesign Ltd | 4+6 | F-Digit '2' | 17/09/2007 |
| 01577 64 | Allocated | Net Solutions Europe Limited | 4+6 | F-Digit '4' | 08/03/2006 |
| 01577 65 | Allocated | Barritel Limited | 4+6 | F-Digit '2' | 21/06/2007 |
| 01577 660 | Protected | - | 4+6 | - | - |
| 01577 661 | Protected | - | 4+6 | - | - |
| 01577 662 | Protected | - | 4+6 | - | - |
| 01577 663 | Protected | - | 4+6 | - | - |
| 01577 664 | Protected | - | 4+6 | - | - |
| 01577 665 | Protected | - | 4+6 | - | - |
| 01577 666 | Allocated | VoiceHost Limited | 4+6 | - | 22/06/2010 |
| 01577 667 | Protected | - | 4+6 | - | - |
| 01577 668 | Protected | - | 4+6 | - | - |
| 01577 669 | Protected | - | 4+6 | - | - |
| 01577 67 | Allocated | Edge Telecom Limited | 4+6 | F-Digit '0' | 22/02/2005 |
| 01577 68 | Allocated | TTNC Limited | 4+6 | F-Digits '0,1,2,3,4,5,6,7,8,9' | 18/09/2006 |
| 01577 69 | Allocated | InTechnology Plc | 4+6 | F-Digit '2' | 04/10/2007 |
| 01577 700 | Protected | - | 4+6 | - | - |
| 01577 701 | Protected | - | 4+6 | - | - |
| 01577 702 | Protected | - | 4+6 | - | - |
| 01577 703 | Protected | - | 4+6 | - | - |
| 01577 704 | Protected | - | 4+6 | - | - |
| 01577 705 | Protected | - | 4+6 | - | - |
| 01577 706 | Protected | - | 4+6 | - | - |
| 01577 707 | Protected | - | 4+6 | - | - |
| 01577 708 | Protected | - | 4+6 | - | - |
| 01577 709 | Protected | - | 4+6 | - | - |
| 01577 710 | Protected | - | 4+6 | - | - |
| 01577 711 | Protected | - | 4+6 | - | - |
| 01577 712 | Protected | - | 4+6 | - | - |
| 01577 713 | Protected | - | 4+6 | - | - |
| 01577 714 | Protected | - | 4+6 | - | - |
| 01577 715 | Protected | - | 4+6 | - | - |
| 01577 716 | Protected | - | 4+6 | - | - |
| 01577 717 | Protected | - | 4+6 | - | - |
| 01577 718 | Protected | - | 4+6 | - | - |
| 01577 719 | Protected | - | 4+6 | - | - |
| 01577 720 | Protected | - | 4+6 | - | - |
| 01577 721 | Protected | - | 4+6 | - | - |
| 01577 722 | Protected | - | 4+6 | - | - |
| 01577 723 | Protected | - | 4+6 | - | - |
| 01577 724 | Protected | - | 4+6 | - | - |
| 01577 725 | Protected | - | 4+6 | - | - |
| 01577 726 | Protected | - | 4+6 | - | - |
| 01577 727 | Protected | - | 4+6 | - | - |
| 01577 728 | Protected | - | 4+6 | - | - |
| 01577 729 | Protected | - | 4+6 | - | - |
| 01577 730 | Protected | - | 4+6 | - | - |
| 01577 731 | Protected | - | 4+6 | - | - |
| 01577 732 | Protected | - | 4+6 | - | - |
| 01577 733 | Protected | - | 4+6 | - | - |
| 01577 734 | Protected | - | 4+6 | - | - |
| 01577 735 | Protected | - | 4+6 | - | - |
| 01577 736 | Protected | - | 4+6 | - | - |
| 01577 737 | Protected | - | 4+6 | - | - |
| 01577 738 | Protected | - | 4+6 | - | - |
| 01577 739 | Protected | - | 4+6 | - | - |
| 01577 740 | Protected | - | 4+6 | - | - |
| 01577 741 | Protected | - | 4+6 | - | - |
| 01577 742 | Protected | - | 4+6 | - | - |
| 01577 743 | Protected | - | 4+6 | - | - |
| 01577 744 | Protected | - | 4+6 | - | - |
| 01577 745 | Protected | - | 4+6 | - | - |
| 01577 746 | Protected | - | 4+6 | - | - |
| 01577 747 | Protected | - | 4+6 | - | - |
| 01577 748 | Protected | - | 4+6 | - | - |
| 01577 749 | Protected | - | 4+6 | - | - |
| 01577 750 | Protected | - | 4+6 | - | - |
| 01577 751 | Protected | - | 4+6 | - | - |
| 01577 752 | Protected | - | 4+6 | - | - |
| 01577 753 | Protected | - | 4+6 | - | - |
| 01577 754 | Protected | - | 4+6 | - | - |
| 01577 755 | Protected | - | 4+6 | - | - |
| 01577 756 | Protected | - | 4+6 | - | - |
| 01577 757 | Protected | - | 4+6 | - | - |
| 01577 758 | Protected | - | 4+6 | - | - |
| 01577 759 | Protected | - | 4+6 | - | - |
| 01577 760 | Protected | - | 4+6 | - | - |
| 01577 761 | Protected | - | 4+6 | - | - |
| 01577 762 | Protected | - | 4+6 | - | - |
| 01577 763 | Protected | - | 4+6 | - | - |
| 01577 764 | Protected | - | 4+6 | - | - |
| 01577 765 | Protected | - | 4+6 | - | - |
| 01577 766 | Protected | - | 4+6 | - | - |
| 01577 767 | Protected | - | 4+6 | - | - |
| 01577 768 | Protected | - | 4+6 | - | - |
| 01577 769 | Protected | - | 4+6 | - | - |
| 01577 770 | Protected | - | 4+6 | - | - |
| 01577 771 | Protected | - | 4+6 | - | - |
| 01577 772 | Protected | - | 4+6 | - | - |
| 01577 773 | Protected | - | 4+6 | - | - |
| 01577 774 | Protected | - | 4+6 | - | - |
| 01577 775 | Protected | - | 4+6 | - | - |
| 01577 776 | Protected | - | 4+6 | - | - |
| 01577 777 | Protected | - | 4+6 | - | - |
| 01577 778 | Protected | - | 4+6 | - | - |
| 01577 779 | Protected | - | 4+6 | - | - |
| 01577 780 | Protected | - | 4+6 | - | - |
| 01577 781 | Protected | - | 4+6 | - | - |
| 01577 782 | Protected | - | 4+6 | - | - |
| 01577 783 | Protected | - | 4+6 | - | - |
| 01577 784 | Protected | - | 4+6 | - | - |
| 01577 785 | Protected | - | 4+6 | - | - |
| 01577 786 | Protected | - | 4+6 | - | - |
| 01577 787 | Protected | - | 4+6 | - | - |
| 01577 788 | Protected | - | 4+6 | - | - |
| 01577 789 | Protected | - | 4+6 | - | - |
| 01577 790 | Protected | - | 4+6 | - | - |
| 01577 791 | Protected | - | 4+6 | - | - |
| 01577 792 | Protected | - | 4+6 | - | - |
| 01577 793 | Protected | - | 4+6 | - | - |
| 01577 794 | Protected | - | 4+6 | - | - |
| 01577 795 | Protected | - | 4+6 | - | - |
| 01577 796 | Protected | - | 4+6 | - | - |
| 01577 797 | Protected | - | 4+6 | - | - |
| 01577 798 | Protected | - | 4+6 | - | - |
| 01577 799 | Protected | - | 4+6 | - | - |
| 01577 80 | Allocated | Affiniti Integrated Solutions Ltd | 4+6 | - | 17/06/2004 |
| 01577 81 | Allocated | Localphone Limited | 4+6 | F-Digit '0' | 10/05/2007 |
| 01577 82 | Allocated | Nationwide Telephone Assistance Ltd | 4+6 | F-Digit '0' | 02/10/2007 |
| 01577 83 | Allocated | BT | 4+6 | - | 15/07/2005 |
| 01577 84 | Allocated | BT | 4+6 | - | 15/07/2005 |
| 01577 85 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01577 86 | Allocated | BT | 4+6 | - | 15/07/1994 |
| 01577 870 | Protected | - | 4+6 | - | - |
| 01577 871 | Protected | - | 4+6 | - | - |
| 01577 872 | Protected | - | 4+6 | - | - |
| 01577 873 | Protected | - | 4+6 | - | - |
| 01577 874 | Protected | - | 4+6 | - | - |
| 01577 875 | Protected | - | 4+6 | - | - |
| 01577 876 | Protected | - | 4+6 | - | - |
| 01577 877 | Allocated | Spitfire Network Services Ltd | 4+6 | - | 10/11/2011 |
| 01577 878 | Protected | - | 4+6 | - | - |
| 01577 879 | Protected | - | 4+6 | - | - |
| 01577 880 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 881 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 882 | Protected | - | 4+6 | - | - |
| 01577 883 | Protected | - | 4+6 | - | - |
| 01577 884 | Protected | - | 4+6 | - | - |
| 01577 885 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 886 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 887 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 888 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 889 | Allocated | Vodafone Ltd (Thus) | 4+6 | - | 21/05/1998 |
| 01577 89 | Allocated | Magrathea Telecommunications Limited | 4+6 | - | 24/09/2004 |
| 01577 900 | Protected | - | 4+6 | - | - |
| 01577 901 | Protected | - | 4+6 | - | - |
| 01577 902 | Protected | - | 4+6 | - | - |
| 01577 903 | Protected | - | 4+6 | - | - |
| 01577 904 | Protected | - | 4+6 | - | - |
| 01577 905 | Protected | - | 4+6 | - | - |
| 01577 906 | Protected | - | 4+6 | - | - |
| 01577 907 | Protected | - | 4+6 | - | - |
| 01577 908 | Protected | - | 4+6 | - | - |
| 01577 909 | Protected | - | 4+6 | - | - |
| 01577 910 | Protected | - | 4+6 | - | - |
| 01577 911 | Protected | - | 4+6 | - | - |
| 01577 912 | Protected | - | 4+6 | - | - |
| 01577 913 | Protected | - | 4+6 | - | - |
| 01577 914 | Protected | - | 4+6 | - | - |
| 01577 915 | Protected | - | 4+6 | - | - |
| 01577 916 | Protected | - | 4+6 | - | - |
| 01577 917 | Protected | - | 4+6 | - | - |
| 01577 918 | Protected | - | 4+6 | - | - |
| 01577 919 | Protected | - | 4+6 | - | - |
| 01577 920 | Protected | - | 4+6 | - | - |
| 01577 921 | Protected | - | 4+6 | - | - |
| 01577 922 | Protected | - | 4+6 | - | - |
| 01577 923 | Protected | - | 4+6 | - | - |
| 01577 924 | Protected | - | 4+6 | - | - |
| 01577 925 | Protected | - | 4+6 | - | - |
| 01577 926 | Protected | - | 4+6 | - | - |
| 01577 927 | Protected | - | 4+6 | - | - |
| 01577 928 | Protected | - | 4+6 | - | - |
| 01577 929 | Protected | - | 4+6 | - | - |
| 01577 930 | Protected | - | 4+6 | - | - |
| 01577 931 | Protected | - | 4+6 | - | - |
| 01577 932 | Protected | - | 4+6 | - | - |
| 01577 933 | Protected | - | 4+6 | - | - |
| 01577 934 | Protected | - | 4+6 | - | - |
| 01577 935 | Protected | - | 4+6 | - | - |
| 01577 936 | Protected | - | 4+6 | - | - |
| 01577 937 | Protected | - | 4+6 | - | - |
| 01577 938 | Protected | - | 4+6 | - | - |
| 01577 939 | Protected | - | 4+6 | - | - |
| 01577 940 | Protected | - | 4+6 | - | - |
| 01577 941 | Protected | - | 4+6 | - | - |
| 01577 942 | Protected | - | 4+6 | - | - |
| 01577 943 | Protected | - | 4+6 | - | - |
| 01577 944 | Protected | - | 4+6 | - | - |
| 01577 945 | Protected | - | 4+6 | - | - |
| 01577 946 | Protected | - | 4+6 | - | - |
| 01577 947 | Protected | - | 4+6 | - | - |
| 01577 948 | Protected | - | 4+6 | - | - |
| 01577 949 | Protected | - | 4+6 | - | - |
| 01577 950 | Protected | - | 4+6 | - | - |
| 01577 951 | Protected | - | 4+6 | - | - |
| 01577 952 | Protected | - | 4+6 | - | - |
| 01577 953 | Protected | - | 4+6 | - | - |
| 01577 954 | Protected | - | 4+6 | - | - |
| 01577 955 | Protected | - | 4+6 | - | - |
| 01577 956 | Protected | - | 4+6 | - | - |
| 01577 957 | Protected | - | 4+6 | - | - |
| 01577 958 | Protected | - | 4+6 | - | - |
| 01577 959 | Protected | - | 4+6 | - | - |
| 01577 960 | Protected | - | 4+6 | - | - |
| 01577 961 | Protected | - | 4+6 | - | - |
| 01577 962 | Protected | - | 4+6 | - | - |
| 01577 963 | Protected | - | 4+6 | - | - |
| 01577 964 | Protected | - | 4+6 | - | - |
| 01577 965 | Protected | - | 4+6 | - | - |
| 01577 966 | Protected | - | 4+6 | - | - |
| 01577 967 | Protected | - | 4+6 | - | - |
| 01577 968 | Protected | - | 4+6 | - | - |
| 01577 969 | Protected | - | 4+6 | - | - |
| 01577 970 | Protected | - | 4+6 | - | - |
| 01577 971 | Protected | - | 4+6 | - | - |
| 01577 972 | Protected | - | 4+6 | - | - |
| 01577 973 | Protected | - | 4+6 | - | - |
| 01577 974 | Protected | - | 4+6 | - | - |
| 01577 975 | Protected | - | 4+6 | - | - |
| 01577 976 | Protected | - | 4+6 | - | - |
| 01577 977 | Protected | - | 4+6 | - | - |
| 01577 978 | Protected | - | 4+6 | - | - |
| 01577 979 | Protected | - | 4+6 | - | - |
| 01577 980 | Protected | - | 4+6 | - | - |
| 01577 981 | Protected | - | 4+6 | - | - |
| 01577 982 | Protected | - | 4+6 | - | - |
| 01577 983 | Protected | - | 4+6 | - | - |
| 01577 984 | Protected | - | 4+6 | - | - |
| 01577 985 | Protected | - | 4+6 | - | - |
| 01577 986 | Protected | - | 4+6 | - | - |
| 01577 987 | Protected | - | 4+6 | - | - |
| 01577 988 | Protected | - | 4+6 | - | - |
| 01577 989 | Protected | - | 4+6 | - | - |
| 01577 99 | Protected | - | N/A | - | - |