NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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 223
ONVOY, LLC - PA 77
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
2021-04-14 223-302 0XXX1XXX2XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - PA 547E BLRDGSUMMT PA
2021-04-14 223-355 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → ONVOY, LLC - PA 547E DRY RUN PA
2021-01-28 223-249 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E MILLERSVL PA
2021-01-28 223-250 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E WAYNESBORO PA
2021-01-28 223-251 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E HARISBGZN2 PA
2021-01-28 223-252 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - PA 547E MCALISTRVL PA
2021-01-15 223-247 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E DOVER PA
2020-10-08 223-243 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E NEWBLOMFLD PA
2020-10-05 223-244 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E LANCASTER PA
2020-05-13 223-235 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E LITTLESTN PA
2020-05-13 223-236 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E MANCHESTER PA
2020-05-13 223-245 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E ANNVILLE PA
2020-01-27 223-323 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E TERRE HILL PA
2020-01-27 223-332 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - PA 547E LYKENS PA
2019-08-14 223-220 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E CHAMBERSBG PA
2018-09-28 223-212 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E CARLISLE PA
2018-08-30 223-747 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E EASTBERLIN PA
2018-08-15 223-206 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E FAYETTEVL PA
2018-08-15 223-207 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E COLUMBIA PA
2018-08-15 223-208 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E LEWISTOWN PA
2017-10-19 223-777 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E STRASBURG PA
2017-10-06 223-222 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PALMYRA PA
2017-09-01 223-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E SHELLSVL PA
2017-08-31 223-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E LANCASTER PA
— 223-238 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E AIRVILLE PA
— 223-333 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E LEBANON PA
— 223-888 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - PA 547E HALIFAX PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.