HyperCloudSoft · Singapore

Keeping your business number during a Singapore PBX migration.

Number eligibility is checked before a migration is promised. A cloud-phone package does not itself confirm that an existing number can move.

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Prepare the current-service information

Provide the current carrier, service type, account holder and the numbers that must remain reachable. Identify any number ranges, hunt groups, fax lines or equipment attached to the existing service. Send account documents only through an agreed secure channel, with unrelated details removed where appropriate.

For an older copper/PSTN or ISDN arrangement, assessment is particularly important. Do not cancel the current service simply because a new PBX subscription has been selected.

Separate PBX setup from carrier work

Extensions, call routes and clients can be configured as one workstream. Carrier approval, number eligibility and any number move are another. Their dependencies and dates must be coordinated. We confirm the proposed carrier arrangement, permitted caller identification and inbound routing during scoping.

Agree the cutover and acceptance tests

Confirm who approves the carrier request and who is available during cutover.
Test inbound calling from more than one external network.
Test outbound caller ID, transfers, voicemail and the intended queue or IVR.
Check device and client behaviour for the people who answer calls.
Agree how callers reach the business if the planned route is unavailable.

Confirm timing and charges in writing

The required documents, lead time, fees and technical options depend on the current service and proposed provider. An initial enquiry cannot establish eligibility or a guaranteed transfer date. Your quotation and migration plan should identify the conditions and responsibilities.

Review the wider migration checklist. Include the current carrier and number-retention requirement in your sales enquiry.

Discuss your requirements

Discuss your requirements Compare published prices

Documents and details usually needed

The company name exactly as it appears on the current telco account.
A recent bill or account statement showing the numbers (with unrelated details redacted where appropriate).
The full list of numbers to move, including any number ranges or hunt groups.
Authorisation from someone who can sign for the account.
The preferred porting date and the cutover contact person.

Exact requirements depend on the carriers involved. We confirm the list during scoping.

A typical porting sequence

Eligibility check. Confirm with the carrier that the numbers and line type can be ported.
Build and test. Set up the new phone system and test it with temporary numbers before porting.
Submit the request. The new carrier submits the port with your authorisation.
Cutover day. Numbers move; we test inbound calls from mobile and landline networks, and outbound caller ID.
Close-out. Only after testing, cancel services that are no longer needed.

Things that commonly cause delays

The account name or details on the request not matching the current telco's records.
Numbers that belong to a block, where the carrier requires the whole block to move together (common with ISDN).
Outstanding contract terms with the current provider.
Services cancelled before porting, which can cause the number to be lost.

While the port is in progress

Staff can already use the new system for internal and outbound calls. Callers still reach you on the old service until the port completes. Plan a fallback, such as call forwarding, in case the cutover window slips.

Porting is quoted case by case. See also replacing your PABX and SIP trunk vs phone lines.

New numbers instead of porting

Sometimes a business decides to take new numbers rather than port, for example when the old line type cannot be ported or the business is moving anyway. If so, plan the change: update the website, email signatures, name cards and online listings, and keep the old number forwarding for a period if the old carrier allows it. New numbers come from the carrier and are quoted per customer.

Frequently asked questions

Can every Singapore business number be ported?

Not always. Eligibility depends on the current carrier, the line type and the contract. We check before promising a move.

Should I cancel my old line first?

No. Cancelling before the port completes can mean losing the number. Cancel only after the new service is tested.

How much does porting cost?

Porting is quoted case by case, because it depends on the carriers, numbers and line types involved.