NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 256
ONVOY, LLC - AL 34
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-09-03 256-915 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E CULLMAN AL
2021-09-03 256-916 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2021-09-03 256-918 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E MASSEY AL
2021-09-03 256-921 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E TALLADEGA AL
2021-09-03 256-928 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → ONVOY, LLC - AL 604E GAYLESVL AL
2021-07-26 256-956 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E FLORENCE AL
2021-03-03 256-866 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E KILLEN AL
2021-01-13 256-967 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E TOWN CREEK AL
2021-01-12 256-897 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E COURTLAND AL
2021-01-12 256-957 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2021-01-11 256-884 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E MENTONE AL
2021-01-08 256-863 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2020-12-31 256-873 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - AL 604E ATTALLA AL
2020-12-28 256-862 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E ANNISTON AL
2020-12-28 256-865 0XXX1XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → ONVOY, LLC - AL 604E ASHLAND AL
2020-12-28 256-871 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E ATHENS AL
2020-12-21 256-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2019-08-08 256-780 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E MRNSCRSRDS AL
2019-08-08 256-870 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E MADISON AL
2018-08-29 256-719 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E MOULTON AL
2017-01-09 256-860 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E GUNTERSVL AL
2016-03-17 256-291 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E RUSSELLVL AL
2016-02-17 256-787 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E HANCEVILLE AL
2015-11-25 256-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2015-09-25 256-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GURLEY AL
2014-10-13 256-973 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2008-06-11 256-886 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2007-04-19 256-690 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
— 256-257 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E FALKVILLE AL
— 256-406 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E FORT PAYNE AL
— 256-596 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E ALEXANDRCY AL
— 256-646 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GADSDEN AL
— 256-674 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E VALLEYHEAD AL
— 256-987 0XXX1XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - AL 604E GRAYSON AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.