Code allocations for numbers beginning 03123

Summary

  • Status
    • Protected: 1
  • Operators : 1
  • Latest change : June 2025
Click here for Status definitions
Have you received a call from a number beginning 03123? Get information on a full number beginning 03123, using our full UK number search.
Find out about the location and calling costs for 0312 numbers on our 0312 code page.

This page contains information about which telephone companies the various 03123 numbers are allocated to.

First Digits Status
0312 3 Protected