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 947
ONVOY, LLCV - MI 23
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
2023-06-26 947-248 0XXX1XXX2XXX3XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C ROCHESTER MI
2023-06-26 947-265 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C NORTHVILLE MI
2023-06-26 947-266 2XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C MILFDWH LK MI
2023-06-26 947-267 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C COMMERCE MI
2021-10-19 947-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C W BLOOMFLD MI
2021-05-19 947-247 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C HOLLY MI
2021-01-12 947-272 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2021-01-05 947-244 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2020-12-17 947-479 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C ROCHESTER MI
2020-11-24 947-227 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C WALLEDLAKE MI
2020-09-17 947-957 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2020-06-24 947-223 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C COMMERCE MI
2020-06-23 947-941 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ROYAL OAK MI
2016-04-25 947-200 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2016-04-25 947-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C MILFDWH LK MI
2015-09-29 947-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C DRAYTON PL MI
2015-09-29 947-333 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C LAKE ORION MI
2015-09-29 947-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C COMMERCE MI
2015-09-29 947-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2015-08-19 947-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C CLARKSTON MI
2015-06-16 947-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C MILFDWH LK MI
— 947-219 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C BIRMINGHAM MI
— 947-282 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C SOUTHFIELD MI

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.