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The Cellular One Carrier From United States is denoted by codes: 310 320, 310 390, 310 570. The followings IDs are called HNI (Home network identity). This code is created by the combination of two other Mobile Country Code (MCC) and Mobile Network Code (MNC). The first three numbers stand for the MCC and they are used in order to identify the region which the carried comes from (in the following example it’s United States). The last numbers of the HNI code are equal with the MNC and this ID is given for the specific mobile network operator.
Besides Cellular One United States has assigned country code + 1. This number + 1 is equal with international calling code and it’s simply the telephone dialing prefixes used for calling Cellular One numbers.
Cellular One uses 1 GSM bands, 0 UMTS bands, 0 and 0 CDMA bands.. You can read the specific frequency bands in the table below. All bands of the Cellular One are display in MHz units.
Another important information in Cellular One United States architectures is the standard of used protocols. It also uses 1 protocols such as GSM, UMTS, LTE, CDMA. The ISO standard code of Cellular One is US. You can see more info about this mobile network operator at https://www.cellularoneonline.com/. How to check Cellular One coverage? How to check if your phone will work in United States?
| Name | Cellular One |
|---|---|
| Company | Smith Bagley, Inc. |
| Country |  United States |
| Country ISO | US |
| Country code | + 1 |
| Carrier website | https://www.cellularoneonline.com/ |
| Carrier codes |
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| Mobile prefix | 2xx, 3xx, 4xx, 5xx, 6xx, 7xx, 8xx, 9xx |
| Mobile prefix comment | Mobile number format: +1 NXX-NXX-XXXX, N=digits 2–9, X=digits 0–9. The first 3 digits, NXX, is geographic area code. |
| Size of NSN | 10 |
| Number format | +1 2xx xxx xxxx +1 3xx xxx xxxx +1 4xx xxx xxxx +1 5xx xxx xxxx +1 6xx xxx xxxx +1 7xx xxx xxxx +1 8xx xxx xxxx +1 9xx xxx xxxx more... |
| Coverage map | Check Cellular One Coverage |
| GSM bands |
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| UMTS protocols |
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