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1800 xxx xxxx - Toll-free domestic services (Free if calling from a landline. Airtime charges apply if calling from a mobile line. '1800' is alias for '6'; as such these services can be reached as toll numbers, including from outside of Singapore, by replacing '1800 xxx xxxx' with '+65 6xxx xxxx'.) 1900 xxx xxxx - Premium rate services
In North America, the area served by the North American Numbering Plan (NANP) system of area codes, fictitious telephone numbers are usually of the form (XXX) 555-xxxx. The use of 555 numbers in fiction, however, led a desire to assign some of them in the real world, and some of them are no longer suitable for use in fiction.
A1. Belgium. +32. 456. 9. Unleashed (Mobile Vikings / JIM Mobile) (or other) Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). If there is only 32.. followed by any other, shorter number, like 32 51 724859, this is the number of a normal phone, not a mobile.
A QR code for the URL of the English Wikipedia Mobile main page. A QR code (short for " quick-response code ") is a type of two-dimensional matrix barcode, invented in 1994, by Japanese company Denso Wave for labelling automobile parts.   A barcode is a machine-readable optical image that contains information specific to the labelled item.
A dial tone ( dialling tone in the UK) is a telephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone, when an off-hook condition is detected. It indicates that the exchange is working and is ready to initiate a telephone call. The tone stops when the first dialed digit is ...
5. GreatPeopleSearch. GreatPeopleSearch is a user-friendly free reverse phone number lookup site that provides searchers with fast and accurate results. It draws on publicly available national ...
As with the landline home numbers, the mobile numbers' middle three-digit part is extended to four digits (e.g., 016490641) due to the increased number of mobile phone users. Business numbers If a number starts with 070, the number does not belong to any particular area, and is a number given by an Internet telephone service.
E.123. E.123 is an international standard by the standardization union ( ITU-T ), entitled Notation for national and international telephone numbers, e-mail addresses and web addresses.  It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.