This page contains information about which telephone companies the various 03336 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0333 600 | Allocated | Windsor Telecom Plc | 06/2008 |
| 0333 601 | Free | - | - |
| 0333 602 | Free | - | - |
| 0333 603 | Free | - | - |
| 0333 604 | Free | - | - |
| 0333 605 | Free | - | - |
| 0333 606 | Free | - | - |
| 0333 607 | Free | - | - |
| 0333 608 | Free | - | - |
| 0333 609 | Free | - | - |
| 0333 610 | Free | - | - |
| 0333 611 | Free | - | - |
| 0333 612 | Free | - | - |
| 0333 613 | Free | - | - |
| 0333 614 | Free | - | - |
| 0333 615 | Free | - | - |
| 0333 616 | Free | - | - |
| 0333 617 | Free | - | - |
| 0333 618 | Free | - | - |
| 0333 619 | Free | - | - |
| 0333 620 | Free | - | - |
| 0333 621 | Free | - | - |
| 0333 622 | Allocated | Promotions4All Ltd | 12/2009 |
| 0333 623 | Free | - | - |
| 0333 624 | Free | - | - |
| 0333 625 | Free | - | - |
| 0333 626 | Free | - | - |
| 0333 627 | Free | - | - |
| 0333 628 | Free | - | - |
| 0333 629 | Free | - | - |
| 0333 630 | Free | - | - |
| 0333 631 | Free | - | - |
| 0333 632 | Free | - | - |
| 0333 633 | Allocated | Teledesign Ltd | 08/2008 |
| 0333 634 | Free | - | - |
| 0333 635 | Free | - | - |
| 0333 636 | Allocated | Eclipse Tel Limited | 11/2009 |
| 0333 637 | Free | - | - |
| 0333 638 | Free | - | - |
| 0333 639 | Free | - | - |
| 0333 640 | Free | - | - |
| 0333 641 | Free | - | - |
| 0333 642 | Allocated | Safety In Numbers.co.uk Limited | 07/2014 |
| 0333 643 | Free | - | - |
| 0333 644 | Free | - | - |
| 0333 645 | Free | - | - |
| 0333 646 | Free | - | - |
| 0333 647 | Free | - | - |
| 0333 648 | Free | - | - |
| 0333 649 | Free | - | - |
| 0333 650 | Free | - | - |
| 0333 651 | Free | - | - |
| 0333 652 | Free | - | - |
| 0333 653 | Free | - | - |
| 0333 654 | Free | - | - |
| 0333 655 | Free | - | - |
| 0333 656 | Free | - | - |
| 0333 657 | Free | - | - |
| 0333 658 | Free | - | - |
| 0333 659 | Free | - | - |
| 0333 660 | Free | - | - |
| 0333 661 | Free | - | - |
| 0333 662 | Free | - | - |
| 0333 663 | Free | - | - |
| 0333 664 | Allocated | BT | 11/2014 |
| 0333 665 | Allocated | BT | 11/2014 |
| 0333 666 | Allocated | Admiral Telecom Limited | 03/2007 |
| 0333 667 | Free | - | - |
| 0333 668 | Free | - | - |
| 0333 669 | Free | - | - |
| 0333 670 | Allocated | Stream Live Ltd | 08/2012 |
| 0333 671 | Free | - | - |
| 0333 672 | Free | - | - |
| 0333 673 | Free | - | - |
| 0333 674 | Free | - | - |
| 0333 675 | Free | - | - |
| 0333 676 | Free | - | - |
| 0333 677 | Allocated | SOS Technology Limited | 08/2012 |
| 0333 678 | Allocated | SwanseaIT Limited T/A Blue Telecoms | 05/2014 |
| 0333 679 | Free | - | - |
| 0333 680 | Free | - | - |
| 0333 681 | Free | - | - |
| 0333 682 | Free | - | - |
| 0333 683 | Free | - | - |
| 0333 684 | Free | - | - |
| 0333 685 | Free | - | - |
| 0333 686 | Free | - | - |
| 0333 687 | Free | - | - |
| 0333 688 | Allocated | Numbers Telecom Limited | 07/2012 |
| 0333 689 | Free | - | - |
| 0333 690 | Free | - | - |
| 0333 691 | Free | - | - |
| 0333 692 | Free | - | - |
| 0333 693 | Free | - | - |
| 0333 694 | Free | - | - |
| 0333 695 | Free | - | - |
| 0333 696 | Free | - | - |
| 0333 697 | Free | - | - |
| 0333 698 | Free | - | - |
| 0333 699 | Free | - | - |