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 531
ONVOY, LLC - NE 64
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
2025-09-24 531-430 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2025-04-16 531-396 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E LINCOLN NE
2025-04-08 531-395 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2025-02-06 531-371 0XXX8XXX9XXX which blocks → ONVOY, LLC - NE 549E NORFOLK NE
2025-02-06 531-372 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2024-03-26 531-366 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2024-02-22 531-361 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NE 549E FREMONT NE
2024-02-22 531-362 0XXX1XXX2XXX3XXX5XXX8XXX · 6 holders which blocks → ONVOY, LLC - NE 549E BEATRICE NE
2024-02-14 531-360 0XXX1XXX2XXX3XXX · 4 holders which blocks → ONVOY, LLC - NE 549E ALBION NE
2023-08-17 531-341 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E CARLETON NE
2023-08-17 531-342 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E ONG NE
2023-08-04 531-334 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E OHIOWA NE
2023-08-04 531-336 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E BENNET NE
2023-08-04 531-337 3XXX7XXX · 2 holders which blocks → ONVOY, LLC - NE 549E PLATTE CTR NE
2023-08-04 531-339 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E AVOCA NE
2023-06-27 531-328 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → ONVOY, LLC - NE 549E FAIRBURY NE
2023-06-27 531-332 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E OSCEOLA NE
2023-06-23 531-327 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E WESTERN NE
2023-05-31 531-325 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2023-04-12 531-317 0XXX1XXX3XXX5XXX · 3 holders which blocks → ONVOY, LLC - NE 549E HALLAM NE
2023-04-12 531-318 0XXX1XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E WILBER NE
2023-04-12 531-319 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC - NE 549E DAVENPORT NE
2023-04-12 531-320 0XXX1XXX4XXX · 2 holders which blocks → ONVOY, LLC - NE 549E GRAFTON NE
2023-04-12 531-323 0XXX1XXX5XXX · 2 holders which blocks → ONVOY, LLC - NE 549E JULIAN NE
2021-06-23 531-322 0XXX2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - NE 549E CERESCO NE
2021-04-29 531-776 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - NE 549E AINSWORTH NE
2021-04-13 531-810 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E LINCOLN NE
2021-04-13 531-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2021-03-08 531-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E COLUMBUS NE
2020-10-26 531-353 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NE 549E WAHOO NE
2020-04-03 531-253 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E OTOE NE
2020-04-03 531-534 0XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - NE 549E DEWEESE NE
2020-04-03 531-551 0XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E DUNBAR NE
2019-08-23 531-238 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E RANDOLPH NE
2019-08-22 531-235 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E EMERSON NE
2019-08-22 531-236 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E HUMPHREY NE
2019-08-22 531-237 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E PENDER NE
2019-07-18 531-230 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E COLUMBUS NE
2019-05-01 531-221 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E SO YANKTON NE
2019-03-07 531-331 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - NE 549E MARTELL NE
2019-03-07 531-351 3XXX5XXX6XXX which blocks → ONVOY, LLC - NE 549E TABLE ROCK NE
2019-03-07 531-535 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - NE 549E KENESAW NE
2019-03-06 531-231 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - NE 549E CLAYCENTER NE
2019-03-06 531-251 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E DAWSON NE
2019-03-06 531-521 0XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - NE 549E DAVEY NE
2019-03-06 531-533 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E GUIDE ROCK NE
2019-02-15 531-530 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E LINCOLN NE
2018-10-24 531-234 0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - NE 549E NEWMAN GRV NE
2018-10-15 531-227 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E CLARKSON NE
2018-04-27 531-223 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NE 549E HOWELLS NE

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.