NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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, all time — NPA 434
BRIGHTSPEED OF VIRGINIA, LLC 76
NEW CINGULAR WIRELESS PCS, LLC - DC 44
VERIZON VIRGINIA, INC. 42
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 32
ONVOY, LLC - VA 28
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-02-24 434-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LYNCHBURG VA
2020-11-11 434-427 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E EMPORIA VA
2020-10-15 434-554 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E DANVILLE VA
2020-10-09 434-431 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E WHITMELL VA
2020-10-08 434-445 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - VA 138E DILLWYN VA
2020-09-29 434-291 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J LYNCHBURG VA
2020-09-29 434-833 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J CHARLOTSVL VA
2020-09-18 434-257 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J CHARLOTSVL VA
2020-09-08 434-241 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J LYNCHBURG VA
2020-09-08 434-399 3XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H RENAN VA
2020-09-08 434-622 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CREWE VA
2020-09-08 434-633 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CONCORD VA
2020-09-08 434-644 0XXX1XXX2XXX4XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H BURKEVILLE VA
2020-09-08 434-655 0XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BRODNAX VA
2020-09-08 434-722 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BARNESVL VA
2020-09-08 434-844 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H ALLWOOD VA
2020-09-08 434-899 0XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BLACKRIDGE VA
2020-09-08 434-966 0XXX1XXX6XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BEECHWOOD VA
2020-09-04 434-355 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H EPPES FORK VA
2020-09-04 434-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BROOKNEAL VA
2020-08-31 434-368 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 EMPORIA VA
2020-08-13 434-240 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J CHATHAM VA
2020-07-13 434-344 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H LA CROSSE VA
2020-07-13 434-567 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SOBRUNSWIK VA
2020-07-13 434-677 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H VICTORIA VA
2020-07-13 434-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GLADSTONE VA
2020-07-13 434-788 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H KENBRIDGE VA
2020-07-13 434-877 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FORK UNION VA
2020-06-26 434-235 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J CHARLOTSVL VA
2020-06-19 434-345 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ALTAVISTA VA
2020-06-19 434-900 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HALIFAX VA
2020-06-10 434-474 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - VA 138E HAMPDESDNY VA
2020-05-13 434-436 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E DRAKESBRCH VA
2020-05-11 434-998 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E APPOMATTOX VA
2020-02-18 434-232 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J LYNCHBURG VA
2019-10-23 434-424 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHARLOTSVL VA
2019-10-09 434-231 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E SCHUYLER VA
2019-10-03 434-443 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E CHARLOTSVL VA
2019-09-18 434-597 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - VA 138E STONYCREEK VA
2019-05-17 434-230 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F SOUTH HILL VA
2019-05-14 434-331 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E EMPORIA VA
2019-04-25 434-217 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHASE CITY VA
2019-03-28 434-278 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F PINEYRIVER VA
2019-03-27 434-393 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHRLTTCTHS VA
2019-03-21 434-468 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CAPRON VA
2019-03-20 434-300 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J LYNCHBURG VA
2019-03-20 434-400 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J CHARLOTSVL VA
2019-03-19 434-800 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J LAWRENCEVL VA
2019-03-08 434-666 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H CHARLOTSVL VA
2019-03-07 434-500 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BOYDTON VA

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.