NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, last 30 days
New assignments by month
Sep 2026
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 903-634 | 7XXX which blocks → | CUMBY TELEPHONE COOPERATIVE, INC. | 4042 | LONE OAK | TX |
| — | 903-635 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LONGVIEW | TX |
| — | 903-636 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | BIG SANDY | TX |
| — | 903-637 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | PITTSBURG | TX |
| — | 903-639 | not yet reported which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | HUGHES SPG | TX |
| — | 903-640 | none assigned yet which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | BONHAM | TX |
| — | 903-641 | 1XXX5XXX8XXX9XXX which blocks → | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| — | 903-642 | 1XXX2XXX4XXX6XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | OAKWOOD | TX |
| — | 903-643 | none assigned yet which blocks → | SOUTHWESTERN BELL | 9533 | LONGVIEW | TX |
| — | 903-645 | not yet reported which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | DAINGERFLD | TX |
| — | 903-646 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HENDERSON | TX |
| — | 903-647 | 3XXX5XXX6XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | DENISON | TX |
| — | 903-648 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | WEAVER | TX |
| — | 903-649 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HENDERSON | TX |
| — | 903-651 | 0XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | WHITESBORO | TX |
| — | 903-652 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | DEPORT | TX |
| — | 903-653 | 0XXX1XXX2XXX4XXX5XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | LONGVIEW | TX |
| — | 903-654 | 9XXX which blocks → | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| — | 903-655 | 4XXX9XXX · 2 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | HENDERSON | TX |
| — | 903-656 | 5XXX which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | LONE STAR | TX |
| — | 903-657 | not yet reported which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | HENDERSON | TX |
| — | 903-658 | 8XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HENDERSON | TX |
| — | 903-660 | 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | HALLSVILLE | TX |
| — | 903-661 | not yet reported which blocks → | BRIGHTSPEED OF EASTERN TEXAS, INC. | 2084 | PALESTINE | TX |
| — | 903-662 | 1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | LONE OAK | TX |
| — | 903-663 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | LONGVIEW | TX |
| — | 903-664 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | TELEPHONE | TX |
| — | 903-665 | 0XXX which blocks → | SOUTHWESTERN BELL | 9533 | JEFFERSON | TX |
| — | 903-666 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | JEFFERSON | TX |
| — | 903-667 | not yet reported which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | DEKALB | TX |
| — | 903-668 | 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | HALLSVILLE | TX |
| — | 903-670 | not yet reported which blocks → | BRIGHTSPEED OF EASTERN TEXAS, INC. | 2084 | ATHENS | TX |
| — | 903-671 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | REDWATER | TX |
| — | 903-672 | 7XXX which blocks → | BRIGHTSPEED OF LOUISIANA, LLC | 0434 | VIVIAN | TX |
| — | 903-673 | 6XXX which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | PURDON | TX |
| — | 903-674 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | DETROIT | TX |
| — | 903-675 | not yet reported which blocks → | BRIGHTSPEED OF EASTERN TEXAS, INC. | 2084 | ATHENS | TX |
| — | 903-676 | 8XXX which blocks → | BRIGHTSPEED OF EASTERN TEXAS, INC. | 2084 | ATHENS | TX |
| — | 903-677 | not yet reported which blocks → | BRIGHTSPEED OF EASTERN TEXAS, INC. | 2084 | ATHENS | TX |
| — | 903-678 | not yet reported which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | BECKVILLE | TX |
| — | 903-679 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | KARNACK | TX |
| — | 903-681 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ATHENS | TX |
| — | 903-682 | 6XXX which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | FROST | TX |
| — | 903-683 | 0XXX which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | RUSK | TX |
| — | 903-684 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | AVERY | TX |
| — | 903-685 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | GARY | TX |
| — | 903-686 | 1XXX2XXX3XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | LONGVIEW | TX |
| — | 903-687 | not yet reported which blocks → | EASTEX TEL. COOP., INC. | 2068 | WASKOM | TX |
| — | 903-690 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | CARTHAGE | TX |
| — | 903-691 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | TEXARKANA | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.