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Number Porting to VoIP — What to Expect

Porting moves a geographic or non-geographic number range from the losing carrier to your new VoIP provider. Done well it is invisible to customers; done badly it means busy tones on a Tuesday morning. Paperwork discipline wins.

Next step: Align broadband go-live with port dates. Contact us with your current bill and company registration name.

Lead times and blackout windows

Simple ports may complete in a couple of weeks; multi-line DDI blocks or complex legacy billing can stretch longer. Avoid major marketing pushes in the ±48h window around port.

Reject reasons you can prevent

Company name mismatch, wrong postcode, outstanding charges or pending orders on the line all cause rejects. Ask the losing CP for a “single line integrity” check before you submit.

Temporary forwarding

Dual-forward rarely replaces a formal port — costs add up — but staged testing with pilot DIDs reduces risk. Document inbound hunt group behaviour after cutover.

Cutover-night runbook

Pair with renewal playbook and PSTN migration; test 999/112 from a handset after SIP re-registers.

Related guides

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