Numbering Resources

PCS 5YY-NXX Assignments

PCS 5YY numbers are used for "follow me" personal communication services. Personal communications service is defined more formally as "a set of capabilities that allows some combination of personal mobility, terminal mobility, and service profile management. It enables each personal communications service user to participate in a user-defined set of subscribed services and to initiate and/or receive calls on the basis of some combination of a personal number, terminal number, and service profile across multiple networks at any terminal, fixed or mobile, irrespective of geographic location. Service is limited only by terminal and network capabilities and restrictions imposed by the personal communications service provider."

PCS 5YY numbers are in the format 5YY-NXX-XXXX. 5YY-NXX codes, each subsuming a block of 10,000 numbers, are assigned to service providers who provide personal communications service as defined above. These service providers, in turn, assign individual numbers to their customers.

Potential customers in search of a particular PCS 5YY number should download and review current 5YY-NXX assignments, find the NXX for the number they want, and contact the service provider listed to determine if the number and service they want is available. Unlike toll free numbers, PCS 5YY numbers are not portable, so PCS 5YY numbers may not be ported from one service provider to another.

It is important to note that PCS 5YY numbers are not defined as free to the calling party. In fact, the assignment guidelines do not address charging for personal communications services. Depending on the service provider, calls could be charged to the calling party, the called party, or some combination of both.

5YY-NXX codes are assigned according to guidelines developed by the Industry Numbering Committee, which is sponsored by ATIS.

View current 5YY-NXX assignments

Request a 5YY-NXX assignment

In July 2011, the industry set aside the following NPAs to augment the 5YY resources: 521, 523, 524, 525, 526, 527, 528, 529, 532, 538, 542, 543, 545, 547, 549, 552, 553, 554, 556, 569, 578 and 589. These are in addition to the previously-reserved NPAs 577, 588, and 522.

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