NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 928-736 | NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM | 4449 | TOYEI | AZ | |
| 928-737 | HOPI TELECOMMUNICATIONS INCORPORATED - AZ | 815D | POLACCA | AZ | |
| 928-738 | HOPI TELECOMMUNICATIONS INCORPORATED - AZ | 815D | KEAMSCNYON | AZ | |
| 928-739 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | SHOW LOW | AZ | |
| 928-752 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | FLAGSTAFF | AZ | |
| 928-753 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | KINGMAN | AZ | |
| 928-754 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | BULLHDCYN | AZ | |
| 928-755 | NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM | 4449 | GANADO | AZ | |
| 928-756 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | PRESCOTT | AZ | |
| 928-757 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | KINGMAN | AZ | |
| 928-758 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | BULLHEADCY | AZ | |
| 928-759 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-763 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | BULLHEADCY | AZ | |
| 928-764 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | CASTLEROCK | AZ | |
| 928-765 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | WIKIEUP | AZ | |
| 928-766 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | YUCCA | AZ | |
| 928-767 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | LKMHVRNCHS | AZ | |
| 928-768 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | MOHAVE VLY | AZ | |
| 928-769 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | PEACH SPG | AZ | |
| 928-770 | CSC VOICE, LLC | 612K | MOHAVE VLY | AZ | |
| 928-771 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-772 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-773 | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ | |
| 928-774 | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ | |
| 928-775 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-776 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-777 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-778 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-779 | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ | |
| 928-781 | NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM | 4449 | CHINLE | AZ | |
| 928-782 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-783 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-785 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-787 | NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM | 4449 | LUKACHUKAI | AZ | |
| 928-788 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | MOHAVE VLY | AZ | |
| 928-789 | NORTH COUNTY COMMUNICATIONS CORPORATION | 8293 | FLAGSTAFF | AZ | |
| 928-810 | NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM | 4449 | WINDOWROCK | AZ | |
| 928-811 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | AZ | |
| 928-812 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | GLOBE | AZ | |
| 928-813 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | GLOBE | AZ | |
| 928-817 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | YUMA | AZ | |
| 928-819 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-821 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ | |
| 928-828 | VALLEY TEL COOP INC | 2176 | BONITA | AZ | |
| 928-830 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ | |
| 928-832 | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ | |
| 928-833 | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ | |
| 928-851 | FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ | 4419 | BOUSE | AZ | |
| 928-853 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | FLAGSTAFF | AZ | |
| 928-854 | CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | LKHAVASUCY | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.