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 937
ONVOY, LLC - OH 19
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
2022-02-04 937-934 0XXX1XXX2XXX4XXX · 3 holders which blocks → ONVOY, LLC - OH 464C JACKSONCTR OH
2022-02-01 937-942 2XXX4XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C HIGGINSPT OH
2021-07-22 937-905 0XXX1XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C WMANSFIELD OH
2021-07-16 937-814 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
2021-06-21 937-812 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C XENIA OH
2020-05-28 937-932 0XXX1XXX2XXX3XXX · 2 holders which blocks → ONVOY, LLC - OH 464C HUNTSVILLE OH
2020-05-28 937-989 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C YORKCENTER OH
2018-04-09 937-637 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
2018-02-22 937-897 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C SIDNEY OH
2017-11-01 937-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C BEAVERCREK OH
2017-10-31 937-600 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C XENIA OH
2017-06-14 937-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C JACKSONCTR OH
2016-04-07 937-230 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C MILFORDCTR OH
2016-04-07 937-880 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C RAYMOND OH
2016-04-07 937-967 1XXX2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - OH 464C MT VICTORY OH
2014-12-23 937-970 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C CEDARVILLE OH
2010-03-25 937-716 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
2007-12-21 937-867 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
— 937-751 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH

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.