When you sign up for a fax or voice subscription you will need to select a telephone number. For certain subscriptions you get to choose between Geographic numbers and National numbers. Geographic nrs are regular fixed line telephone numbers with a net code indicating a specific city or locality, for example 020 for Amsterdam. If you want a geographic number you are required to have a physical presence in the city in question. National or Non-Geographic nrs have a net code that is not linked to a specific city, for example 085 or 088 in the Netherlands. For these numbers you are only required to have a physical presence in the Netherlands.
XOIP operates a specific type of Dutch non-geographic number type with net codes 084 and 087 that is designated especially for IP telecommunications services and for which the calling rate can be set by the service provider. XOIP used to have free fax and voice number services based on a premium call rate but decided to phase out this ‘caller pays’ model. All XOIP numbers for newly issued (paid) XOIP subscriptions have the regular national rate, meaning that callers do not pay any surcharge over and above their regular call charges. The only difference with 085 / 088 numbers is that XOIP’s 084 and 087 numbers cannot be ported out. If you want to be able to take your number to another provider you need to select a geographic or 085 number.
084/087 numbers with a premium calling rate are still in service but are being phased out.
084/087 numbers can receive calls from networks within the Netherlands. In case you expect to receive calls from outside the EU or from online fax sending services, we recommend that you opt for a geographic number.
Porting your existing telephone number to XOIP
For Fax Pro subscriptions XOIP can take over your existing telephone number. You can choose this as an option when you select your number. XOIP charges a one-off porting fee to cover administrative expenses, which is specified in your subscription price. It will take approximately 5-7 working days to port your number. You need to upload a recent invoice with the number indicated on it, to prove that you are the number holder.
At the moment you can only select a f you want to port in your number.