What is number porting?¶
Number porting allows a customer to keep the same mobile number when moving to a different network provider.
What this means¶
The number stays the same, but the network, SIM or eSIM and account records may change.
A number may have been with one provider during the relevant event and another provider later.
The handset may also have changed.
The SIM identifiers and subscription details may be different before and after the port.
Porting is ordinary and legitimate.
But it may also appear in investigations involving account takeover, fraud or attempts to gain control of a number.
The timing of the port can be important.
It may be registered to one person, used by another and moved between devices and providers.
The operational takeaway is: number porting preserves the telephone number while changing the provider and network identity behind it. Establish the relevant-time provider, SIM, device and user before interpreting the records.
What to check or do next¶
- Investigators should therefore ask which provider served the number at the relevant time.
- Look for provider-change notices, replacement SIMs, account-security alerts, loss of service, password resets and communications around the event.
Evidential limits¶
This matters because a current provider record may not explain the entire history of the number.
Do not assume the present network held the historical records.
The number itself does not identify the user.