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Codes & Tools for Using Wireless Away from Home & Out of the Country

Mobile Network Codes (MNC)
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Roaming Code Key Roaming Codes:
The Mobile Network Code (MNC) is a 6-digit number used by wireless networks to determine on which network your wireless device should be operating.  The MNC is transmitted by the cell site and a list of codes is saved in the wireless handset.

The System IDentification Number (SID) is a 15-bit numeric identifier used by cellular systems to identify the home system of a wireless carrier and by the cellular telephone to determine its roaming status.  The SID is transmitted by the cell site.

The Preferred Roaming List (PRL) is a list of numbers stored in a CDMA wireless phone that determines how your phone will behave in certain geographic areas, whether or not it can roam and on what roaming carriers. 
Our PRL's are no longer being updated.

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