This page contains information about which telephone companies the various 02306 numbers are allocated to.
| First Digits | Status | Number Length |
|---|---|---|
| 023 0600 | Free for National Dialling Only | (0)+10 |
| 023 0601 | Free for National Dialling Only | (0)+10 |
| 023 0602 | Free for National Dialling Only | (0)+10 |
| 023 0603 | Free for National Dialling Only | (0)+10 |
| 023 0604 | Free for National Dialling Only | (0)+10 |
| 023 0605 | Free for National Dialling Only | (0)+10 |
| 023 0606 | Free for National Dialling Only | (0)+10 |
| 023 0607 | Free for National Dialling Only | (0)+10 |
| 023 0608 | Free for National Dialling Only | (0)+10 |
| 023 0609 | Free for National Dialling Only | (0)+10 |
| 023 0610 | Free for National Dialling Only | (0)+10 |
| 023 0611 | Free for National Dialling Only | (0)+10 |
| 023 0612 | Free for National Dialling Only | (0)+10 |
| 023 0613 | Free for National Dialling Only | (0)+10 |
| 023 0614 | Free for National Dialling Only | (0)+10 |
| 023 0615 | Free for National Dialling Only | (0)+10 |
| 023 0616 | Free for National Dialling Only | (0)+10 |
| 023 0617 | Free for National Dialling Only | (0)+10 |
| 023 0618 | Free for National Dialling Only | (0)+10 |
| 023 0619 | Free for National Dialling Only | (0)+10 |
| 023 0620 | Free for National Dialling Only | (0)+10 |
| 023 0621 | Free for National Dialling Only | (0)+10 |
| 023 0622 | Free for National Dialling Only | (0)+10 |
| 023 0623 | Free for National Dialling Only | (0)+10 |
| 023 0624 | Free for National Dialling Only | (0)+10 |
| 023 0625 | Free for National Dialling Only | (0)+10 |
| 023 0626 | Free for National Dialling Only | (0)+10 |
| 023 0627 | Free for National Dialling Only | (0)+10 |
| 023 0628 | Free for National Dialling Only | (0)+10 |
| 023 0629 | Free for National Dialling Only | (0)+10 |
| 023 0630 | Free for National Dialling Only | (0)+10 |
| 023 0631 | Free for National Dialling Only | (0)+10 |
| 023 0632 | Free for National Dialling Only | (0)+10 |
| 023 0633 | Free for National Dialling Only | (0)+10 |
| 023 0634 | Free for National Dialling Only | (0)+10 |
| 023 0635 | Free for National Dialling Only | (0)+10 |
| 023 0636 | Free for National Dialling Only | (0)+10 |
| 023 0637 | Free for National Dialling Only | (0)+10 |
| 023 0638 | Free for National Dialling Only | (0)+10 |
| 023 0639 | Free for National Dialling Only | (0)+10 |
| 023 0640 | Free for National Dialling Only | (0)+10 |
| 023 0641 | Free for National Dialling Only | (0)+10 |
| 023 0642 | Free for National Dialling Only | (0)+10 |
| 023 0643 | Free for National Dialling Only | (0)+10 |
| 023 0644 | Free for National Dialling Only | (0)+10 |
| 023 0645 | Free for National Dialling Only | (0)+10 |
| 023 0646 | Free for National Dialling Only | (0)+10 |
| 023 0647 | Free for National Dialling Only | (0)+10 |
| 023 0648 | Free for National Dialling Only | (0)+10 |
| 023 0649 | Free for National Dialling Only | (0)+10 |
| 023 0650 | Free for National Dialling Only | (0)+10 |
| 023 0651 | Free for National Dialling Only | (0)+10 |
| 023 0652 | Free for National Dialling Only | (0)+10 |
| 023 0653 | Free for National Dialling Only | (0)+10 |
| 023 0654 | Free for National Dialling Only | (0)+10 |
| 023 0655 | Free for National Dialling Only | (0)+10 |
| 023 0656 | Free for National Dialling Only | (0)+10 |
| 023 0657 | Free for National Dialling Only | (0)+10 |
| 023 0658 | Free for National Dialling Only | (0)+10 |
| 023 0659 | Free for National Dialling Only | (0)+10 |
| 023 0660 | Free for National Dialling Only | (0)+10 |
| 023 0661 | Free for National Dialling Only | (0)+10 |
| 023 0662 | Free for National Dialling Only | (0)+10 |
| 023 0663 | Free for National Dialling Only | (0)+10 |
| 023 0664 | Free for National Dialling Only | (0)+10 |
| 023 0665 | Free for National Dialling Only | (0)+10 |
| 023 0666 | Free for National Dialling Only | (0)+10 |
| 023 0667 | Free for National Dialling Only | (0)+10 |
| 023 0668 | Free for National Dialling Only | (0)+10 |
| 023 0669 | Free for National Dialling Only | (0)+10 |
| 023 0670 | Free for National Dialling Only | (0)+10 |
| 023 0671 | Free for National Dialling Only | (0)+10 |
| 023 0672 | Free for National Dialling Only | (0)+10 |
| 023 0673 | Free for National Dialling Only | (0)+10 |
| 023 0674 | Free for National Dialling Only | (0)+10 |
| 023 0675 | Free for National Dialling Only | (0)+10 |
| 023 0676 | Free for National Dialling Only | (0)+10 |
| 023 0677 | Free for National Dialling Only | (0)+10 |
| 023 0678 | Free for National Dialling Only | (0)+10 |
| 023 0679 | Free for National Dialling Only | (0)+10 |
| 023 0680 | Free for National Dialling Only | (0)+10 |
| 023 0681 | Free for National Dialling Only | (0)+10 |
| 023 0682 | Free for National Dialling Only | (0)+10 |
| 023 0683 | Free for National Dialling Only | (0)+10 |
| 023 0684 | Free for National Dialling Only | (0)+10 |
| 023 0685 | Free for National Dialling Only | (0)+10 |
| 023 0686 | Free for National Dialling Only | (0)+10 |
| 023 0687 | Free for National Dialling Only | (0)+10 |
| 023 0688 | Free for National Dialling Only | (0)+10 |
| 023 0689 | Free for National Dialling Only | (0)+10 |
| 023 0690 | Free for National Dialling Only | (0)+10 |
| 023 0691 | Free for National Dialling Only | (0)+10 |
| 023 0692 | Free for National Dialling Only | (0)+10 |
| 023 0693 | Free for National Dialling Only | (0)+10 |
| 023 0694 | Free for National Dialling Only | (0)+10 |
| 023 0695 | Free for National Dialling Only | (0)+10 |
| 023 0696 | Free for National Dialling Only | (0)+10 |
| 023 0697 | Free for National Dialling Only | (0)+10 |
| 023 0698 | Free for National Dialling Only | (0)+10 |
| 023 0699 | Free for National Dialling Only | (0)+10 |