Checkliste für Nummernportierung

Account number, PIN, authorized user name as it appears on the bill

Shows billing address and account details needed for verification

Address on file must match exactly - including suite/unit numbers

Early termination fees may apply - review your current agreement

Main lines, fax lines, toll-free numbers - list everything

Different number types have different porting requirements

Each carrier has their own LOA form - use the correct one

Must be signed by account holder or authorized contact

Leave no blanks - incomplete LOAs will be rejected

Signature must match the authorized user on the account

Some carriers require photo ID of the authorized signer

Store digitally for easy reference if issues arise

Avoid Monday mornings or month-end - schedule mid-week if possible

Simple ports: 1-3 days | Complex/business ports: 5-10 business days

Let team know when brief service interruption may occur

Some carriers allow call forwarding during transition

So you can test immediately and resolve issues quickly

Set up users, extensions, voicemail before port completes

Make test calls to verify system works before porting

IVR, ring groups, after-hours routing should be ready

Record professional greetings for all mailboxes

Critical for emergency services - verify address is correct

Hardware should be ready before go-live

Call from mobile/external line to verify calls route correctly

Verify caller ID displays correctly on outbound calls

Leave messages and retrieve them to confirm working

Send and receive test faxes

Listen for echo, latency, or audio issues

Verify with previous carrier to avoid double billing

If number changed, update website, business cards, ads